Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
  • H01F27/36—Electric or magnetic shields or screens
  • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
  • B60L53/12—Inductive energy transfer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/30—Constructional details of charging stations
  • B60L53/32—Constructional details of charging stations by charging in short intervals along the itinerary, e.g. during short stops
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/28—Coils; Windings; Conductive connections
  • H01F27/2871—Pancake coils
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
  • H01F27/36—Electric or magnetic shields or screens
  • H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic material
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
  • H01F38/14—Inductive couplings
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
  • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Definitions

• the present disclosure relates to a coil unit, a power transmission device, a power reception device, a power transmission system, and a mobile object.
• JP2021-27112A discloses a coil unit used in a power transmitting device and a power receiving device of a wireless power transmission system.
• the coil unit includes a coil formed in a spiral shape.
• a magnetic field is generated in the coil. Due to the influence of this magnetic field, current flows through the coil of the power receiving device.
• a large high-frequency current is passed through a resonant circuit that includes a coil. At this time, the amount of heat generated by the coil increases. The amount of heat generated by the coil increases due to, for example, the skin effect.
• the skin effect is suppressed. Therefore, heat generation in the coil can be suppressed.
• the Litz wire is formed by twisting together a large number of enameled wires, the manufacturing cost is high and it takes time and effort to manufacture. In high power systems, the coils can be large, which can add to manufacturing costs and labor.
• JP2021-27112A a technique is also known that employs a planar coil that has a spiral shape and a plate shape, and has a rectangular conductor cross section. According to such a planar coil, the thickness of the coil can be reduced.
• a power transmission device is installed on a road surface such as a parking lot, and a power reception device is installed in the electric vehicle.
• a power transmitting device and/or a power receiving device includes a coil unit in order to generate a magnetic field or to generate a current due to the influence of the magnetic field.
• a coil unit in order to generate a magnetic field or to generate a current due to the influence of the magnetic field.
• the first invention has been made in consideration of these points, and aims to reduce the dimensions of the coil unit.
• the second invention has been made in consideration of these points, and aims to realize efficient power transmission.
• the first invention aims to reduce the size of a coil unit.
• the coil unit according to the first invention includes: A coil including a coil element formed in a spiral shape around an arbitrary central axis, a magnetic resin layer, a first shield member, and a second shield member,
• the coil has a first main surface and a second main surface opposite to the first main surface,
• the magnetic resin layer is in direct contact with the second main surface of the coil,
• the coil, the magnetic resin layer, the first shield member, and the second shield member are laminated in this order in a direction from the first main surface to the second main surface,
• the first shield member is divided into a plurality of shield pieces.
• the coil element may include a conductor having a spiral shape
• the magnetic resin layer may be in direct contact with the conductor
• the first shield member may include ferrite.
• the distance between the first shield member and the second shield member may be 2 mm or less.
• a heat conductive member may be disposed between the first shield member and the second shield member.
• the coil element includes a first straight section group consisting of a plurality of first straight sections arranged in a radial direction and extending in a first direction, and a first straight section group consisting of a plurality of first straight sections arranged in a radial direction and extending in a second direction non-parallel to the first direction.
• a gap may be formed in the first shield member that extends linearly between adjacent shield pieces and crosses at least a portion of the first straight portion group when viewed in the axial direction.
• the angle formed by the gap and at least a portion of the first straight line portion group may be 80° to 100°.
• the gap and at least a portion of the first straight portion group may be perpendicular to each other.
• the gap may extend from radially inward to the first linear portion group to radially outward from the first linear portion group.
• the gap When viewed in the axial direction, the gap may extend between the second group of straight portions and the central axis.
• the gap or its extension When viewed in the axial direction, the gap or its extension may overlap the central axis.
• the first shield member includes another gap that extends linearly between adjacent shield pieces, and that extends within the first linear section group along the first linear section when viewed in the axial direction. may be formed,
• the other gap is the smallest integer gap greater than or equal to the total number of the plurality of first straight line parts divided by three, counting from the innermost first straight line part of the plurality of first straight line parts. It may extend on the side of the central axis line rather than the one straight line portion.
• the first shield member includes another gap extending linearly between adjacent shield pieces, and extending within the second linear part group along the second linear part when viewed in the axial direction. may be formed,
• the other gap is the smallest integer not less than the value obtained by dividing the total number of the plurality of second straight parts by three, counting from the innermost second straight part of the plurality of second straight parts. It may extend on the side of the central axis line rather than the two straight parts.
• the first shield member includes another gap that extends linearly between adjacent shield pieces, and that extends within the first linear section group along the first linear section when viewed in the axial direction. may be formed,
• the other gap is the smallest integer gap greater than or equal to the total number of the plurality of first straight line parts divided by three, counting from the outermost first straight line part of the plurality of first straight line parts.
• the linear portion may extend on the side opposite to the central axis.
• the first shield member includes another gap extending linearly between adjacent shield pieces, and extending within the second linear part group along the second linear part when viewed in the axial direction. may be formed,
• the other gap is the smallest integer gap greater than or equal to the total number of the plurality of second straight line parts divided by three, counting from the outermost second straight line part of the plurality of second straight line parts.
• the two linear portions may extend on the side opposite to the central axis.
• the coil element is a first straight part group consisting of a plurality of first straight parts arranged in the radial direction and extending in the first direction; a second straight part group consisting of a plurality of second straight parts arranged in the radial direction and extending in a second direction non-parallel to the first direction; an intermediate curved section group that is arranged between the first straight section group and the second straight section group and includes a plurality of intermediate curved sections; It may further include, Adjacent end portions of the first straight line portion and the second straight line portion may be connected via the intermediate curved portion.
• a gap may be formed in the first shield member that extends linearly between adjacent shield pieces and crosses at least a portion of the group of intermediate curved portions when viewed in the axial direction.
• an angle between the gap and a tangent to at least a portion of the group of intermediate curved portions may be 80° to 100°.
• the gap and the tangent line may be perpendicular to each other when viewed in the axial direction.
• the coil element is a first straight part group consisting of a plurality of first straight parts arranged in the radial direction and extending in the first direction; a second linear portion group consisting of a plurality of second linear portions arranged in the radial direction and extending in a second direction non-parallel to the first direction; a first intermediate straight line part group that is arranged between the first straight line part group and the second straight line part group and includes a plurality of first intermediate straight line parts; may further include, Adjacent end portions of the first linear portion and the second linear portion may be connected via the first intermediate linear portion.
• the angle formed by the first straight portion and the first intermediate straight portion may be 125° to 145°
• the angle formed by the second straight portion and the first intermediate straight portion may be 125° to 145°.
• the angle formed by the first straight line portion and the first intermediate straight line portion may be 135°
• the angle between the second straight portion and the first intermediate straight portion may be 135°
• the coil element may be generally octagonal in shape.
• the coil element may have a generally regular octagonal shape.
• a gap may be formed in the first shield member that extends linearly between adjacent shield pieces and crosses at least a portion of the first intermediate straight portion group when viewed in the axial direction.
• the angle formed by the gap and the at least part of the first intermediate straight portion group may be 80° to 100°.
• the gap and at least a portion of the first intermediate straight portion group may be perpendicular to each other.
• the coil element is a first straight part group consisting of a plurality of first straight parts arranged in the radial direction and extending in the first direction; a second linear portion group consisting of a plurality of second linear portions arranged in the radial direction and extending in a second direction non-parallel to the first direction; a first intermediate straight line part group that is arranged between the first straight line part group and the second straight line part group and includes a plurality of first intermediate straight line parts; a second intermediate straight portion group that is arranged between the first intermediate straight portion group and the second intermediate straight portion group and includes a plurality of second intermediate straight portions; may further include, Adjacent end portions of the first linear portion and the second linear portion may be connected via the first intermediate linear portion, Adjacent end portions of the first intermediate straight portion and the second straight portion may be connected via the second intermediate straight portion.
• the angle formed by the first straight line portion and the first intermediate straight line portion may be 140° to 160°
• the angle formed by the first intermediate straight portion and the second intermediate straight portion may be 140° to 160°
• the angle formed by the second intermediate straight portion and the second straight portion may be 140° to 160°.
• the angle formed by the first straight line portion and the first intermediate straight line portion may be 150°
• the angle formed by the first intermediate straight portion and the second intermediate straight portion may be 150°
• the angle between the second intermediate straight portion and the second straight portion may be 150°.
• the coil element may have a generally dodecagonal shape.
• the coil element may have a regular dodecagonal shape as a whole.
• the first shield member has a gap that extends linearly between adjacent shield pieces, and includes at least a portion of the first group of intermediate straight portions or at least one of the group of second intermediate linear portions when viewed in the axial direction.
• a gap may be formed across the section.
• the angle formed by the gap and the at least part of the first intermediate straight part group or the at least part of the second intermediate straight part group may be 80° to 100°. .
• the gap and the at least part of the first group of intermediate straight parts or the at least part of the group of second intermediate straight parts may be perpendicular to each other.
• a gap may be formed in the first shield member, which is a gap extending linearly between adjacent shield pieces and crossing at least a portion of the coil element when viewed in the axial direction, Viewed in the axial direction, the gap may intersect at least a portion of the plurality of turns forming the coil element; When viewed in the axial direction, at a point where the gap and the turn intersect, an angle between the gap and the turn or a tangent to the turn may be 80° to 100°.
• the gap When viewed in the axial direction, at a point where the gap and the turn intersect, the gap may be orthogonal to the turn or a tangent to the turn.
• the coil unit according to the first invention may further include a first connection terminal connected to the coil,
• the coil may have an inner end close to the central axis and an outer end far from the central axis,
• the first connection terminal may be connected to the inner end and extend from the inside of the coil to the outside.
• the first shield member may have a gap extending linearly between adjacent shield pieces and extending from the inside of the coil to the outside. Viewed in the axial direction, the first connection terminal may extend within the gap or within a notch formed in the shield piece.
• the first connection terminal may extend from the inside of the coil to the outside at a height position overlapping the small shield piece.
• the coil element may have a plurality of turns arranged in a radial direction, When viewed in the axial direction, at a point where the first connection terminal and each turn portion intersect, an angle formed by the first connection terminal and the turn portion or a tangent to the turn portion is 80° to 100°. It's okay.
• the first connection terminal When viewed in the axial direction, at a point where the first connection terminal intersects each turn, the first connection terminal may be orthogonal to the turn or a tangent to the turn.
• the coil element may further include a straight part group consisting of a plurality of straight parts arranged in the radial direction and extending in the same direction, When viewed in the axial direction, the first connection terminal may intersect with the group of straight parts.
• the angle formed by the first connection terminal and the straight line portion group may be 80° to 100°.
• the first connection terminal When viewed in the axial direction, the first connection terminal may be perpendicular to the group of straight portions.
• the coil element may further include a curved section group consisting of a plurality of curved sections arranged in the radial direction and extending parallel to each other, When viewed in the axial direction, the first connection terminal may intersect with the group of curved portions.
• an angle between the first connection terminal and a tangent to the curved portion group may be 80° to 100°.
• the first connection terminal When viewed in the axial direction, the first connection terminal may be orthogonal to a tangent to the group of curved portions.
• the first point may be a point where the first connection terminal and the outer peripheral edge of the first shield member overlap when viewed in the axial direction
• a point where a second connection terminal connected to the outer end portion and an outer peripheral edge of the first shield member overlap may be defined as a second point
• an angle formed by a first imaginary line connecting the first point and the central axis line and a second imaginary line connecting the second point and the central axis line is 90° or less It may be.
• the angle formed by the first virtual line and the second virtual line may be 45° or less.
• the first point may be a point where the first connection terminal and the outer peripheral edge of the first shield member overlap when viewed in the axial direction, When viewed in the axial direction, a point where a second connection terminal connected to the outer end portion and an outer peripheral edge of the first shield member overlap may be defined as a second point, The distance between the first point and the second point may be 100 mm or less.
• the distance between the first point and the second point may be 50 mm or less.
• the coil unit according to the first invention may further include a second connection terminal connected to the coil, When viewed in the axial direction, the second shield member may have a rectangular shape, and the first connection terminal and the second connection terminal may extend from the same side of the second shield member. .
• the coil element may revolve around the central axis in a first rotation direction from an outer end to an inner end thereof,
• the outer end portion may be offset from the inner end portion in the first circumferential direction.
• the coil element includes a first turn portion including the inner end portion, and a second turn portion radially adjacent to the first turn portion, the coil element being radially outward from the first turn portion.
• a power transmission device includes a coil unit according to the first invention.
• a power receiving device includes a coil unit according to the first invention.
• the power transmission system includes: Comprising a power transmission device and a power reception device, At least one of the power transmitting device and the power receiving device includes a coil unit according to the first invention.
• a moving body according to the first invention includes a coil unit according to the first invention.
• the dimensions of the coil unit can be reduced.
• the second invention aims to realize efficient power transmission.
• a coil unit according to a second invention includes a coil including a coil element formed in a spiral shape around an arbitrary central axis, Viewed axially, the coil element is generally octagonal in shape.
• the coil element may include seven groups of straight portions extending along seven of the eight sides of the octagon; The angle formed by the adjacent groups of linear portions may be 125° to 145°.
• the angle formed by the adjacent linear portion groups may be 135°.
• the coil element may have a generally regular octagonal shape.
• the coil unit according to the second invention includes a coil including a coil element formed in a spiral shape around an arbitrary central axis, Viewed axially, the coil element has a generally dodecagonal shape.
• the coil element may include 11 linear portion groups extending along 11 of the 12 sides of the dodecagon, The angle formed by the group of adjacent straight portions may be 140° to 160°.
• the angle formed by the adjacent straight line portion groups may be 150°.
• the coil element may have a regular dodecagonal shape as a whole.
• the coil unit according to the second invention may further include a first shield member,
• the first shield member may be divided into a plurality of shield pieces,
• the first shield member may have a gap extending linearly between adjacent shield pieces,
• the coil element may include a group of straight parts arranged in a radial direction and consisting of a plurality of straight parts extending in the same direction, When viewed in the axial direction, the gap may cross at least a portion of the straight portion group.
• the angle formed by the gap and the at least part of the group of straight portions may be 80° to 100°.
• the gap When viewed in the axial direction, the gap may be orthogonal to the at least a portion of the group of straight portions.
• the power transmission device includes the coil unit according to the second invention.
• the power receiving device includes the coil unit according to the second invention.
• the power transmission system includes: Comprising a power transmission device and a power reception device, At least one of the power transmitting device and the power receiving device includes a coil unit according to the second invention.
• the moving body according to the second invention includes the coil unit according to the second invention.
• FIG. 1 is a diagram schematically showing a wireless power transmission system to which a coil unit according to an embodiment can be applied.
• FIG. 2 is a perspective view of a coil unit used in the wireless power transmission system shown in FIG. 1.
• FIG. 3 is an exploded perspective view of the coil unit shown in FIG. 2.
• FIG. 4 is a sectional view of the coil unit taken along line IV-IV in FIG. 2.
• 5A is a plan view of the coil unit shown in FIG. 2.
• FIG. FIG. 5B is a diagram showing a first point, a second point, a first virtual line, and a second virtual line of the coil unit shown in FIG. 5A.
• FIG. 6A is a diagram corresponding to FIG. 5A, and is a diagram showing a modified example of the coil unit.
• FIG. 5A is a diagram corresponding to FIG. 5A, and is a diagram showing a modified example of the coil unit.
• FIG. 6B is a diagram showing a first point, a second point, a first virtual line, and a second virtual line in the coil unit shown in FIG. 6A.
• FIG. 7 is a cross-sectional view of the coil unit taken along line VII-VII in FIG. 6A.
• FIG. 8 is a diagram corresponding to FIG. 5A, and is a diagram showing another modification of the coil unit.
• FIG. 9 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 10 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 11 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 12 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 13 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 14 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 15 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 16 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 17 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 18 is a cross-sectional view of the coil unit taken along line XVIII-XVIII in FIG. 17.
• FIG. 19 is an exploded perspective view of the coil shown in FIG. 17.
• FIG. 20 is a diagram corresponding to FIG. 17 and illustrating still another modification of the coil unit.
• FIG. 21 is a diagram corresponding to FIG. 17 and illustrating still another modification of the coil unit.
• FIG. 22 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 23 is a diagram corresponding to FIG. 17 and illustrating still another modification of the coil unit.
• FIG. 24 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 25 is a diagram corresponding to FIG.
• FIG. 26 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 27 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 28 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 29 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 30 is a diagram corresponding to FIG. 17, and is a diagram showing still another modification of the coil unit.
• FIG. 31 is a diagram corresponding to FIG. 17 and illustrating still another modification of the coil unit.
• FIG. 32 is a diagram corresponding to FIG.
• FIG. 33 is a diagram corresponding to FIG. 17 and illustrating still another modification of the coil unit.
• FIG. 34 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 35 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 36 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 37 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 38 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 39 is a diagram corresponding to FIG.
• FIG. 40 is a diagram corresponding to FIG. 5A, and is a diagram showing still another modification of the coil unit.
• FIG. 41 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 42 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 43 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 44 is a diagram corresponding to FIG. 17 and illustrating still another modification of the coil unit.
• FIG. 45 is a diagram corresponding to FIG. 5A and illustrating still another modification of the coil unit.
• FIG. 46 is a table showing the Q value and loss of the coil units of Examples 1-1 to 1-7.
• FIG. 47 is a table showing the Q value and loss of the coil units of Example 2 and Comparative Examples 2-1 to 2-4.
• FIG. 48 is a table showing the evaluation results of the coil unit of Example 3.
• FIG. 49 is a table showing the evaluation results of the coil unit of Example 4.
• FIG. 50 is a table showing the comparison results of the coil units of Example 3 and Example 4.
• FIG. 51 is a table showing the evaluation results of the coil unit of Example 5.
• FIG. 52 is a table showing the evaluation results of the coil unit of Example 6.
• FIG. 53 is a table showing the comparison results of the coil units of Example 5 and Example 6.
• FIG. 54 is a table showing the Q value of the coil unit of Example 7.
• FIG. 55 is a table showing the comparison results of the Q values of the coil units of Example 7.
• FIG. 48 is a table showing the evaluation results of the coil unit of Example 3.
• FIG. 56 is a diagram corresponding to FIG. 17, and is a diagram for explaining the eighth embodiment.
• FIG. 57 is a diagram for explaining the shape of the coil of the coil unit of Example 8-1.
• FIG. 58 is a diagram for explaining the shape of the coil of the coil unit of Example 8-2.
• FIG. 59 is a diagram for explaining the shape of the coil of the coil unit of Example 8-3.
• FIG. 60 is a diagram for explaining the shape of the coil of the coil unit of Example 8-4.
• FIG. 61 is a graph showing the Q values of the coil units of Examples 8-1 to 8-4.
• FIG. 62 is a graph showing the coupling coefficients of the coil units of Examples 8-1 to 8-4.
• FIG. 63 is a graph showing the product of the coupling coefficient and Q value of the coil units of Examples 8-1 to 8-4.
• sheet is a concept that includes members that can also be called films or plates.
• sheet surface refers to the target sheet-like member when the target sheet-like (plate-like, film-like) member is viewed from an overall perspective. Refers to the surface that coincides with the plane direction (plane direction) of a (plate-shaped, film-shaped) member. Furthermore, in this specification, the normal direction of a sheet-like (plate-like, film-like) member refers to the direction toward the sheet surface (plate surface, film surface) of the target sheet-like (plate-like, film-like) member. refers to the normal direction of
• FIG. 1 schematically shows a wireless power transmission system S to which a coil unit according to an embodiment described later can be applied.
• a wireless power transmission system S (hereinafter abbreviated as power transmission system S) will be described with reference to FIG. 1.
• the power transmission system S includes a power transmission device 1 and a power reception device 2.
• Power transmission device 1 includes a coil unit 5 and a high frequency current supply section 1A.
• Coil unit 5 in power transmission device 1 functions as a power transmission coil unit.
• the high frequency current supply section 1A supplies a high frequency current to the coil unit 5 as a power transmission coil unit.
• the power receiving device 2 includes a coil unit 5 and a conversion section 2A.
• the coil unit 5 in the power receiving device 2 functions as a power receiving coil unit.
• the converter 2A shapes the high frequency current generated in the coil unit 5.
• the converter 2A includes a rectifier circuit that converts high frequency current into direct current.
• the power transmitting device 1 When transmitting power wirelessly (non-contact) from the power transmitting device 1 to the power receiving device 2, the power transmitting device 1 supplies high frequency current of a predetermined frequency from the high frequency current supply section 1A to the coil unit 5 as a power transmitting coil unit. do. At this time, a magnetic field is generated in the coil unit 5 due to electromagnetic induction. In the power receiving device 2, a high frequency current is generated in the coil unit 5 as a power receiving coil unit due to the influence of this magnetic field.
• the converter 2A converts this high frequency current into a direct current, and supplies the converted direct current to, for example, a battery (not shown).
• the power transmission system S shown in FIG. 1 employs a magnetic resonance method as a power transmission method.
• the power transmission system S may be configured as an electromagnetic induction power transmission system.
• the power transmission system S is configured as a system that wirelessly transmits power to an electric vehicle.
• the power transmission device 1 is installed on a road, a parking lot, or the like.
• Power receiving device 2 is installed in an electric vehicle.
• the use of the power transmission system S is not limited to power transmission to electric vehicles.
• the power transmission system S may be used to transmit power to a flying object such as a drone or a robot.
• the power transmission system S may be used to transmit power to a submersible underwater or an exploration robot.
• the power transmission system S can be used to transmit power to various moving objects such as electric vehicles, flying objects, robots, and submarines.
• the application of the coil unit according to the embodiment is not limited to a wireless power transmission system.
• the coil unit according to the embodiment may be used in a transformer, a DC-DC converter, an antenna, etc.
• Each of the power transmission systems S includes, as the coil unit 5, one of the coil units 5 according to the first and second embodiments and modifications thereof, which will be described later.
• the same coil unit 5 may be used in each of the power transmitting device 1 and the power receiving device 2.
• different coil units 5 may be used in each of the power transmitting device 1 and the power receiving device 2.
• the coil unit 5 of the first and second embodiments and their modifications may be used in one of the power transmitting device 1 and the power receiving device 2, and another type of coil unit may be used in the other.
• the coil unit 5 according to the first and second embodiments and modifications thereof will be described.
• FIG. 2 is a perspective view of the coil unit 5 according to the first embodiment.
• FIG. 3 is an exploded perspective view of the coil unit 5.
• FIG. 4 is a cross-sectional view of the coil unit 5 taken along line IV-IV in FIG. 5A and 5B are plan views of the coil unit 5.
• FIG. In FIGS. 3 and 5A illustrations of a first connection terminal 46 and a second connection terminal 47, which will be described later, are omitted.
• the coil unit 5 includes a coil 10, a magnetic resin layer 20, a first shield member 30, and a second shield member 40.
• the coil unit 5 further includes a first connection terminal 46 and a second connection terminal 47. As shown in FIG. 2, the first connection terminal 46 and the second connection terminal 47 are connected to one end 10e1 and the other end 10e2 of the coil 10, respectively.
• the coil 10 has a first main surface 10a and a second main surface 10b.
• the second main surface 10b is a surface opposite to the first main surface 10a.
• the coil 10, the magnetic resin layer 20, the first shield member 30, and the second shield member 40 are arranged in this order in the direction from the first main surface 10a to the second main surface 10b.
• first side and second side used with respect to the coil unit 5 and its components mean the side toward which the first major surface 10a faces and the side toward which the second major surface 10b faces, respectively.
• the coil 10 includes a coil element 10i formed in a spiral shape around an arbitrary central axis C.
• the spiral shape refers to the shape of a plane curve that moves away from the center as it turns (or approaches the center as it turns).
• the planar curve mentioned here also includes a planar pattern that is bent in a polygonal line. In the illustrated embodiment, the spiral shape is located on a virtual plane orthogonal to the central axis.
• Coil element 10i is formed from a conductive material. In this embodiment, the coil element 10i is made of copper, but is not limited thereto. Coil element 10i may be formed from other conductive materials such as copper alloy, aluminum, aluminum alloy.
• the coil 10 is composed of a single coil element 10i.
• the coil element 10i is plate-shaped. That is, the coil element 10i is a planar coil. Specifically, the coil element 10i is a non-Litz wire planar coil element. As shown in FIG. 4, the cross-sectional shape of the conducting wire in the direction orthogonal to the spiral-shaped circumferential direction of the coil element 10i is rectangular.
• the symbol C shown in FIGS. 2 to 5B indicates the central axis of the coil element 10i (or the coil 10) passing through the center of the spiral shape of the coil element 10i.
• the axial direction means a direction extending on the central axis C or a direction parallel to the central axis C.
• the radial direction means the radial direction of a circle centered on the central axis C.
• the circumferential direction means a direction along a circle centered on the central axis C (circumferential direction of the circle).
• the coil element 10i includes a conductor 10E having a spiral shape.
• the conductor 10E includes a plurality of turn portions 101 to 108 arranged in the radial direction.
• the conductor 10E includes first to eighth turn portions 101 to 108.
• the first to eighth turn portions 101 to 108 are arranged in this order from the inside to the outside in the radial direction.
• the first turn part 101 is located at the innermost position in the radial direction
• the eighth turn part 108 is located at the outermost position in the radial direction.
• the first turn portion 101 forms the innermost peripheral portion of the coil element 10i.
• the eighth turn portion 108 forms the outermost peripheral portion of the coil element 10i.
• radially inward of a certain member means a position closer to the central axis C than the member.
• the radially outer side of a certain member means a position that is further away from the member in the radial direction.
• radially outward of the coil element 10i this means a position farther outward in the radial direction than the outermost turn portion 108.
• Each of the turn portions 101 to 108 extends on the virtual plane.
• the first to eighth turn portions 101 to 108 are connected in this order, thereby forming the coil element 10i in a spiral shape.
• the coil element 10i (conductor 10E) is wound so that each of the turn portions 101 to 108 generally forms a square, but the coil element 10i (conductor 10E) is not limited to this.
• Each of the turn portions 101 to 108 may be wound so as to substantially form a polygon other than a quadrangle.
• each turn 101-108 is located radially inward than the other end of the turn 101-108.
• the other end of each of the turn parts 101 to 108 is located radially outward from one end of the turn parts 101 to 108.
• Each of the turn parts 101 to 108 includes a plurality of straight parts 11 to 14 arranged around the central axis C.
• Straight portions 11 to 14 adjacent in the circumferential direction of a circle centered on the central axis C are connected to each other.
• circumferentially adjacent linear portions are connected via first intermediate curved portions 151 to 154 that curve along the circumferential direction.
• the first to eighth turn parts 101 to 108 include a first straight part 11 and a third straight part 13 extending in the first direction D1, and a second straight part 12 and a third straight part 13 extending in the second direction D2. 4 straight portions 14.
• the first direction D1 and the second direction D2 are non-parallel to each other.
• the first direction D1 and the second direction D2 are orthogonal to each other.
• the first straight part 11 and the third straight part 13 are arranged so that the central axis C passes therebetween.
• the second straight part 12 and the fourth straight part 14 are arranged so that the central axis C passes therebetween.
• adjacent ends of the first straight part 11 and the second straight part 12 are connected via the first A intermediate curved part 151.
• adjacent ends of the second straight part 12 and the third straight part 13 are connected via the 1B intermediate curved part 152.
• the ends of the third straight part 13 and the fourth straight part 14 that are adjacent to each other are connected via a first C intermediate curved part 153.
• adjacent ends of the fourth straight part 14 of the first turn part 101 and the first straight part 11 of the second turn part 102 are connected via the first D intermediate curved part 154.
• the adjacent ends of the fourth straight part 14 of the second turn part 102 and the first straight part 11 of the third turn part 103 are connected via a first D intermediate curved part 154.
• the first connecting terminal 46 is connected to the first straight portion 11 of the first turn portion 101 located at the innermost position.
• a second connection terminal 47 is connected to the fourth straight portion 14 of the eighth turn portion 108 located at the outermost position.
• the first straight portions 11 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first straight portion group 11G. Further, the second straight portions 12 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a second straight portion group 12G. Further, the third straight portions 13 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a third straight portion group 13G. Further, the fourth straight portions 14 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a fourth straight portion group 14G.
• the radially adjacent straight portions 11, 11; 12, 12; 13, 13; 14, 14 are spaced apart from each other in the radial direction.
• the first to fourth straight line portion groups 11G to 14G are parallel straight line groups consisting of a plurality of first to fourth straight line portions 11 to 14, respectively.
• the first A intermediate curved portions 151 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first A intermediate curved portion group 151G.
• the first B intermediate curved portions 152 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first B intermediate curved portion group 152G.
• the first C intermediate curve portions 153 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first C intermediate curve portion group 153G.
• the first D intermediate curved portions 154 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first D intermediate curved portion group 154G.
• the radially adjacent first intermediate curved portions 151, 151; 152, 152; 153, 153; 154, 154 are spaced apart from each other in the radial direction.
• the 1A to 1D intermediate curve portion groups 151G to 154G are parallel curve groups consisting of a plurality of 1A to 1D intermediate curve portions 151 to 154, respectively.
• the pitches of the plurality of turn portions 101 to 108 are equal. Therefore, the distance between the first turn section 101 and the second turn section 102 is equal to the distance between the second turn section 102 and the third turn section 103. Further, in each of the straight line portion groups 11G to 14G, the pitches of the plurality of straight line portions 11 to 14 are equal. Therefore, the distance between the first straight section 11 of the first turn section 101 and the first straight section 11 of the second turn section 102, and the distance between the first straight section 11 of the second turn section 102 and the first straight section 11 of the third turn section 103 are determined. The distance to the straight part 11 is equal.
• each of the first intermediate curved portion groups 151G to 154G the pitches of the plurality of first intermediate curved portions 151 to 154 are equal. Therefore, the distance between the first intermediate curved section 151 of the first turn section 101 and the first intermediate curved section 151 of the second turn section 102, and the distance between the first intermediate curved section 151 of the second turn section 102 and the third turn section 103 are determined. and the first intermediate curved portion 151 are equal.
• the coil element 10i described above is formed by punching a spiral shape from a metal plate such as a copper plate, for example.
• the coil element 10i can also be formed by etching a metal foil such as a copper foil into a spiral shape.
• the coil element 10i can be formed in a complicated spiral pattern. However, etching takes time and effort to ensure the thickness of the coil element 10i that allows high power transmission. Therefore, punching is preferable from the viewpoint of manufacturing efficiency.
• the thickness of the conductor 10E in the coil element 10i may be, for example, 0.2 mm or more and 1.0 mm or less.
• the radius of the coil element 10i (the distance from the center axis C to the furthest part in the radial direction) may be 200 mm or more.
• the radius of the coil element 10i (from the center axis C to the furthest part in the radial direction) distance) is usually 200 mm or more and 350 mm or less.
• the coil element 10i has an overall rectangular shape.
• the maximum dimension in the longitudinal direction of the coil element 10i may be 300 mm or more and 700 mm or less, and the maximum dimension in the lateral direction perpendicular to the longitudinal direction may be 200 mm or more and 650 mm or less.
• the longitudinal dimension of the coil element 10i may be 550 mm or more and 700 mm or less
• the transverse dimension of the coil element 10i may be 400 mm or more and 550 mm or less.
• the longitudinal dimension of the coil element 10i may be 350 mm or more and 500 mm or less, and the transverse dimension of the coil element 10i may be 200 mm or more and 350 mm or less.
• the thickness of the coil element 10i made of copper is preferably 0.4 mm or more. Note that if the thickness of the coil element 10i is too large, the weight of the coil 10 will increase, which is not preferable for mounting on a vehicle, for example. Therefore, the thickness of the coil element 10i may be, for example, 2.0 mm or less, 1.5 mm or less, or 1.0 mm or less.
• the line width of the conductor 10E in the coil element 10i is not particularly limited. However, considering that power of 1 kW or more, preferably 5 kW or more can be transmitted in the high frequency current frequency range of 79 kHz to 90 kHz, for example, the line width of each turn portion 101 to 108 may be 2 mm or more and 20 mm or less. , 2 mm or more and 16 mm or less, 2 mm or more and 12 mm or less, or 2 mm or more and 8 mm or less. Note that the line width refers to the distance between the inner peripheral surface and the outer peripheral surface of the conductor 10E in a cross section perpendicular to the direction in which the conductor 10E circulates.
• the central axis C of the spiral shape described above is determined in the following manner in this specification. First, from the radially inner end of the innermost turn portion 101, a linear virtual turn portion having a similar shape to the innermost turn portion 101 is formed radially inward in a spiral shape. Draw sequentially. Then, drawing is continued until a virtual turn portion within a diameter of 1 cm can be drawn. Then, a line passing inside the virtual turn part in the radial direction within a diameter of 1 cm in a direction perpendicular to the circumferential direction and the radial direction of the spiral shape is defined as the central axis C.
• the coil 10 has an end 10e1 to which the first connection terminal 46 is connected, and an end 10e2 to which the second connection terminal 47 is connected.
• coil 10 is comprised of a single coil element 10i. Therefore, one end 10e1 is an inner end located radially inward of the coil 10. Further, the other end 10e2 is an outer end located radially outward of the coil 10.
• the inner end portion 10e1 is an end portion of the first turn portion 101 of the coil element 10i.
• the outer end 10e2 is the end of the eighth turn 108 of the coil element 10i.
• the magnetic resin layer 20 is provided for magnetic transmission and/or suppression of leakage magnetic fields.
• the magnetic resin layer 20 overlaps the coil 10 in the axial direction of the coil 10. In this state, the magnetic resin layer 20 is in direct contact with the second main surface 10b of the coil 10. In other words, the magnetic resin layer 20 is in direct contact with the conductor 10E. In the illustrated example, the magnetic resin layer 20 is in close contact with the second main surface 10b of the coil 10. In other words, the magnetic resin layer 20 is in close contact with the conductor 10E.
• the magnetic resin layer 20 covers the second main surface 10b. More specifically, the magnetic resin layer 20 is formed such that its outer periphery is positioned outside the coil 10 when viewed in the axial direction.
• the magnetic resin layer 20 has magnetism.
• the magnetic field generated by the coil unit 5 is generated so as to spread in all directions with respect to the central axis C of the coil 10.
• the magnetic resin layer 20 since the magnetic resin layer 20 has magnetism, it is possible to orient the expanding magnetic flux lines toward the central axis C side. Further, when the magnetic field generated by the coil unit 5 reaches peripheral components located around the coil unit 5, there may be an adverse effect on the peripheral components. Therefore, the magnetic resin layer 20 is provided to suppress the magnetic lines of force from reaching peripheral components. Thereby, the magnetic resin layer 20 can suppress leakage magnetic fields that do not contribute to the generation of current.
• the magnetic resin layer 20 contains a magnetic material.
• the magnetic resin layer 20 preferably contains a soft magnetic material. More specifically, the magnetic resin layer 20 contains ferrite, preferably soft ferrite. Furthermore, the magnetic resin layer 20 may include nanocrystalline magnetic material.
• the magnetic resin layer 20 contains resin.
• resin for forming the magnetic resin layer 20 for example, thermosetting resin such as epoxy resin or polyimide can be used. In this case, when the coil 10 and the magnetic resin layer 20 are integrated by heat pressing as described later, the resin of the magnetic resin layer 20 may be deformed along the shape of the coil 10 during the thermosetting process. is easy.
• a thermoplastic resin such as nylon can also be used. Also in this case, it is easy to deform the resin of the magnetic resin layer 20 along the shape of the coil 10.
• the magnetic resin layer 20 has a spiral-shaped recess 25 corresponding to the spiral shape of the coil 10.
• the recessed portion 25 is a portion of the magnetic resin layer 20 that is recessed in the axial direction of the coil 10, in other words, in the thickness direction of the magnetic resin layer 20.
• the recess 25 has a spiral shape when viewed in the axial direction of the coil 10. At least a portion of the coil 10 is housed in the recess 25 with its spiral shape aligned with the spiral shape of the recess 25. Specifically, the recess 25 accommodates the entire conductor 10E. Therefore, as shown in FIG. 4, the magnetic resin layer 20 is in direct contact with three surfaces of the coil 10 other than the first main surface 10a.
• the conductor 10E does not protrude from the magnetic resin layer 20.
• the first main surface 10a of the coil 10 and the surface of the magnetic resin layer 20 facing the first side are flush with each other.
• only a portion of the coil 10 may be accommodated in the recess 25 so that a portion of the coil 10 protrudes from the magnetic resin layer 20.
• the recess 25 may not be formed in the magnetic resin layer 20, and the coil 10 may be provided on a flat surface of the magnetic resin layer 20.
• the conductor 10E may be embedded in the magnetic resin layer 20 without being exposed to the outside.
• the magnetic resin layer 20 is in close contact with the second main surface 10b of the coil 10.
• the magnetic resin layer 20 is welded to the coil 10 in the recess 25 . That is, the coil 10 and the magnetic resin layer 20 are bonded to each other in the recess 25 by an anchor effect.
• the coil 10 and the magnetic resin layer 20 are integrated by, for example, hot pressing.
• a portion of the magnetic resin layer 20 enters the recess on the surface of the coil 10, and then hardens.
• the coil 10 and the magnetic resin layer 20 are welded together, and the magnetic resin layer 20 is brought into close contact with the coil 10.
• the magnetic resin layer 20 is divided into a plurality of parts, similar to the first shield member 30 described later.
• the magnetic resin layer 20 includes a plurality of magnetic resin elements 21 to 24.
• the magnetic resin layer 20 includes first to fourth magnetic resin elements 21 to 24.
• gaps are formed that extend linearly between adjacent magnetic resin elements 21, 22; 22, 23; 23, 24; 24, 21.
• the gaps extending between the magnetic resin elements 21 to 24 coincide with gaps 51 to 54 extending between the shield pieces 31 to 34, which will be described later, when viewed in the axial direction.
• the magnetic resin layer 20 does not need to be divided into the plurality of magnetic resin elements 21 to 24. In other words, the magnetic resin layer 20 does not need to have any gaps.
• the first shield member 30 is provided for magnetic transmission and/or suppression of leakage magnetic field.
• the first shield member 30 is formed into a plate shape and extends along a plane perpendicular to the axial direction of the coil 10.
• the first shield member 30 has a size such that its outer peripheral edge is located outside the magnetic resin layer 20 and the coil 10 when viewed in the axial direction.
• the first shield member 30 is provided between the second shield member 40, the coil 10, and the magnetic resin layer 20.
• the first shield member 30 includes a magnetic material. As described above, the magnetic field generated by the coil unit 5 is generated so as to spread in all directions with respect to the central axis C of the coil 10. At this time, since the first shield member 30 has magnetism, it is possible to orient the expanding magnetic flux lines toward the central axis C side. Further, the first shield member 30 is provided to suppress the magnetic lines of force from reaching peripheral components. Thereby, the first shield member 30 can suppress leakage magnetic fields that do not contribute to the generation of current.
• the first shield member 30 preferably includes a soft magnetic material. More specifically, the first shield member 30 includes ferrite, preferably soft ferrite. Further, the first shield member 30 may include nanocrystalline magnetic material.
• the first shield member 30 is placed apart from the magnetic resin layer 20, but the invention is not limited thereto.
• the first shield member 30 may be in contact with the magnetic resin layer 20.
• a spacer (not shown) may be arranged between the first shield member 30 and the magnetic resin layer 20.
• the distance between the first shield member 30 and the magnetic resin layer 20 is not particularly limited, but is, for example, 3 mm or less.
• the distance between the first shield member 30 and the magnetic resin layer 20 is preferably 1 mm or less.
• the distance between the first shield member 30 and the magnetic resin layer 20 may be 0 mm.
• the first shield member 30 and the magnetic resin layer 20 may be in direct contact or in close contact with each other. It is preferable to reduce the distance between the first shield member 30 and the magnetic resin layer 20 in order to reduce the dimensions of the coil unit 5 (particularly the dimensions along the axial direction).
• the first shield member 30 is dimensioned so that its outer peripheral edge is located outside the coil 10 when viewed in the axial direction.
• the dimensions of the coil 10 viewed in the axial direction (longitudinal dimension x short
• the dimensions (in the hand direction) are usually 200 mm or more x 200 mm or more. Therefore, in this case, the outer dimensions of the first shield member 30 are also 200 mm or more x 200 mm or more.
• the first shield member 30 when the first shield member 30 is a ferrite plate, it is generally difficult to form a single ferrite plate with both the longitudinal dimension and the lateral dimension exceeding 150 mm. Further, even if it were possible to form a single ferrite plate having both longitudinal and transverse dimensions exceeding 150 mm, such a ferrite plate is likely to break. If the first shield member 30 in the coil unit 5 is cracked, there is a possibility that the performance of the coil unit 5 will deteriorate.
• the coil unit 5 of this embodiment is designed as described below.
• the first shield member 30 is divided into a plurality of shield pieces 30P.
• the first shield member 30 includes a plurality of shield pieces 30P arranged in the same plane.
• the dimensions of each shield piece 30P viewed in the axial direction may be 150 mm or less x 150 mm or less. This facilitates the formation of the first shield member 30 having a large size, and also suppresses the possibility that the individual shield pieces 30P will break.
• the first shield member 30 includes first to fourth shield pieces 31 to 34.
• Each of the shield pieces 31 to 34 has a rectangular shape.
• each shield piece 31-34 includes ferrite. More specifically, each of the shield pieces 31 to 34 is formed of a ferrite plate.
• a gap 50 is formed between adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 31.
• the width of the gap 50 is arbitrary, but in consideration of manufacturing tolerances of the shield pieces 31 to 34, the width of the gap 50 is preferably 1 mm or more.
• the width of the gap 50 may be 2 mm or more, 3 mm or more, or 4 mm or more. However, from the viewpoint of suppressing transmission of magnetic lines of force through the gap 50, the width of the gap is preferably 6 mm or less.
• a plurality of gaps 50 are formed in the first shield member 30. Each gap 50 extends linearly.
• the first shield member 30 has first to fourth gaps 51 to 54 formed therein.
• the first gap 51 extends between the first shield piece 31 and the fourth shield piece 34 along the second direction D2.
• the first gap 51 crosses at least a portion of the first straight portion group 11G when viewed in the axial direction.
• the first gap 51 crosses the first straight portion 11 of the second to eighth turn portions 102 to 108 when viewed in the axial direction.
• the first gap 51 extends from radially inward of the second turn portion 102 to radially outward of the eighth turn portion 108 when viewed in the axial direction.
• the angle formed by the first gap 51 and the first linear portions 11 of the second to eighth turn portions 102 to 108 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the first gap 51 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the first gap 51 can be effectively suppressed. be able to.
• the first gap 51 may be perpendicular to the first straight portions 11 of the second to eighth turn portions 102 to 108 when viewed in the axial direction.
• the second gap 52 extends between the first shield piece 31 and the second shield piece 32 along the first direction D1.
• the second gap 52 crosses at least a portion of the second linear portion group 12G when viewed in the axial direction.
• the second gap 52 crosses the second straight portion 12 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• the second gap 52 extends from radially inward of the first turn portion 101 to radially outward of the eighth turn portion 108 when viewed in the axial direction.
• the angle formed by the second gap 52 and the second straight portions 12 of the first to eighth turn portions 101 to 108 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the second gap 52 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the second gap 52 can be effectively suppressed.
• the second gap 52 may be orthogonal to the second straight portions 12 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• the third gap 53 extends between the second shield piece 32 and the third shield piece 33 along the second direction D2.
• the third gap 53 crosses at least a portion of the third linear portion group 13G when viewed in the axial direction.
• the third gap 53 crosses the third straight portion 13 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• the third gap 53 extends from radially inward of the first turn portion 101 to radially outward of the eighth turn portion 108 when viewed in the axial direction. Since the shield pieces 32 and 33 are arranged so that the third gap 53 crosses the third linear part 13, the lines of magnetic force formed around each third linear part 13 pass through the third gap 53 to the second shield. Reaching the member 40 is suppressed.
• the angle formed by the third gap 53 and the third linear portions 13 of the first to eighth turn portions 101 to 108 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the third gap 53 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the third gap 53 can be effectively suppressed. be able to.
• the third gap 53 may be perpendicular to the third straight portions 13 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• the fourth gap 54 extends between the third shield piece 33 and the fourth shield piece 34 along the first direction D1.
• the fourth gap 54 crosses at least a portion of the fourth linear portion group 14G when viewed in the axial direction.
• the fourth gap 54 crosses the fourth straight portion 14 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• the fourth gap 54 extends from radially inward of the first turn portion 101 to radially outward of the eighth turn portion 108 when viewed in the axial direction. Since the shield pieces 33 and 34 are arranged so that the fourth gap 54 crosses the fourth linear part 14, the lines of magnetic force formed around each fourth linear part 14 pass through the fourth gap 54 to the second shield. Reaching the member 40 is suppressed.
• the angle formed by the fourth gap 54 and the fourth linear portions 14 of the first to eighth turn portions 101 to 108 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the fourth gap 54 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the fourth gap 54 can be effectively suppressed. be able to.
• the fourth gap 54 may be perpendicular to the fourth straight portions 14 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• Each of the gaps 51 to 54 extends into a region surrounded by the turn portion 101 forming the innermost peripheral portion of the coil element 10i.
• the positions of the first gap 51 and the third gap 53 in the first direction D1 match. Therefore, the first gap 51 and the third gap 53 extend continuously in the second direction D2.
• the positions of the second gap 52 and the fourth gap 54 in the second direction D2 match. Therefore, the second gap 52 and the fourth gap 54 extend continuously in the first direction D1.
• the positions of the first gap 51 and the third gap 53 in the first direction D1 may be different.
• the positions of the second gap 52 and the fourth gap 54 in the second direction D2 may be different.
• the first gap 51 and the third gap 53 are formed so that their extension lines pass through the central axis C.
• the first gap 51 and the third gap 53 are formed at positions farthest from the second linear part 12 and the fourth linear part 14 of the turn part 101 forming the innermost peripheral part of the coil element 10i. . This effectively prevents the lines of magnetic force formed around each of the second linear portions 12 and the fourth linear portions 14 from reaching the second shield member 40 through the first gap 51 and the third gap 53. be done.
• the second gap 52 and the fourth gap 54 are formed so that their extension lines pass through the central axis C.
• the second gap 52 and the fourth gap 54 are formed at positions farthest from the first straight part 11 and the third straight part 13 of the turn part 101 forming the innermost peripheral part of the coil element 10i. . This effectively prevents the lines of magnetic force formed around each of the first linear portions 11 and the third linear portions 13 from reaching the second shield member 40 through the second gap 52 and the fourth gap 54. be done.
• the second shield member 40 is arranged on the second side of the coil 10.
• the second shield member 40 shields electromagnetic waves emitted by the coil 10 from the second side.
• metal such as aluminum can be used, for example.
• the second shield member 40 may be a metal plate that constitutes the body of the automobile.
• the second shield member 40 is spaced apart from the first shield member 30.
• a spacer 45 may be arranged between the second shield member 40 and the first shield member 30. Thereby, the distance between the second shield member 40 and the first shield member 30 can be maintained at a predetermined distance.
• the spacer 45 is not particularly limited as long as it is an insulating member, but is preferably a thermally conductive member. Thereby, the spacer 45 can promote heat radiation from the coil unit 5.
• the first shield member 30 and the second shield member 40 may be joined via a heat conductive member as a spacer 45.
• the heat conductive member as the spacer 45 can be formed, for example, of an insulating heat dissipating material made by dispersing a material with high thermal conductivity in an insulating resin. Further, when the spacer 45 is required to have high thermal conductivity, the spacer 45 may be made using the above-mentioned insulating heat dissipation material and a metal member. For example, the spacer 45 having high thermal conductivity can be produced by sandwiching a metal block made of metal such as aluminum between films made of the above-mentioned insulating heat dissipation material. The spacer 45 produced in this way is arranged so that the film is located between the first shield member 30 and the metal block and between the second shield member 40 and the metal block. 30 and the second shield member 40, it effectively promotes heat dissipation from the coil unit 5 while ensuring insulation between the first shield member 30 and the second shield member 40. can do.
• the second shield member 40 is arranged close to the first shield member 30, for example, if the distance between the second shield member 40 and the first shield member 30 is set to 10 mm or less, the lines of magnetic force generated in the coil 10 will be It is thought that this makes it easier for the eddy current to reach the second shield member 40, thereby making it easier for eddy currents to occur in the second shield member 40.
• the loss of the second shield member 40 increases, and the loss of the coil unit 5 increases.
• gaps 51 to 54 are formed in the first shield member 30.
• the magnetic lines of force reach the second shield member 40 through the gaps 51 to 54 of the first shield member 30. Therefore, when the second shield member 40 is brought closer to the first shield member 30 in the coil unit 5 of the present embodiment, the coil unit It is considered that the loss of 5 becomes large.
• the coil unit 5 includes the magnetic resin layer 20 in direct contact with (or in close contact with) the second main surface 10b of the coil 10, so that the second shield member 40 is 1. Increase in loss of the coil unit 5 due to proximity to the shield member 30 can be suppressed. Furthermore, according to the knowledge obtained by the present inventor, by making the positional relationship between the coil 10 and the gaps 51 to 54 between the shield pieces 31 to 34 into the above-mentioned positional relationship, the second shield member 40 can be connected to the first shield member 40. Increase in loss of the coil unit 5 due to proximity to the member 30 can be suppressed. This contributes to reducing the dimensions (particularly the dimensions along the axial direction) of the coil unit 5.
• the distance L1 between the second shield member 40 and the first shield member 30 may be 10 mm or less. , may be 5 mm or less, may be 3 mm or less, may be 2 mm or less, and may be 1 mm or less.
• the distance L1 between the second shield member 40 and the first shield member 30 may be 10 mm or more, and may be 15 mm or more.
• the length may be 20 mm or more.
• the distance L1 between the second shield member 40 and the first shield member 30 is preferably 10 mm or less, and 5 mm or less. It is more preferably 3 mm or less, even more preferably 2 mm or less, even more preferably 1 mm or less. Further, when the distance L1 between the second shield member 40 and the first shield member 30 is 1 mm or more, it is preferable to use the above-described spacer having high thermal conductivity as the spacer 45.
• the distance between the first main surface 10a of the coil 10 of the present embodiment and the first side surface of the second shield member 40 is L2 can be 10 mm or less, 5 mm or less, and 3 mm or less.
• the first connection terminal 46 and the second connection terminal 47 can be used, for example, when connecting to the high frequency current supply section 1A or the conversion section 2A.
• the connection between the first connection terminal 46 and the first turn portion 101 and the connection between the second connection terminal 47 and the eighth turn portion 108 are performed by ultrasonic bonding.
• the connection method is not limited, and for example, connection using a conductive adhesive may be employed.
• the first connection terminal 46 and the second connection terminal 47 are connected to the high frequency current supply section 1A or the AC power source as shown in FIG.
• the current can be passed from the first connection terminal 46 to the coil 10 and then from the second connection terminal 47 to the high frequency current supply section 1A or the AC power source. Further, after the current is passed through the coil 10 from the second connection terminal 47, it can be passed from the first connection terminal 46 to the high frequency current supply section 1A or the AC power source. Thereby, a magnetic field including lines of magnetic force along the central axis of the coil 10 can be generated.
• a high frequency current can be generated in the coil 10 by receiving a magnetic field including lines of magnetic force along the central axis of the coil 10. This high frequency current can then be supplied to an external device from the first connection terminal 46 or the second connection terminal 47.
• the first connection terminal 46 is connected to the inner end 10e1 of the coil 10. In other words, the first connection terminal 46 is connected to the first straight portion 11 of the first turn portion 101 forming the innermost peripheral portion of the coil element 10i.
• the second connection terminal 47 is connected to the outer end 10e2 of the coil 10. In other words, the second connection terminal 47 is connected to the fourth straight portion 14 of the eighth turn portion 108 forming the outermost peripheral portion of the coil element 10i.
• the first connection terminal 46 extends from the inside of the coil 10 in the radial direction to the outside.
• the first connection terminal 46 extends outward in the radial direction of the coil 10, crossing one of the linear portion groups 11G to 14G of the coil element 10i when viewed in the axial direction.
• an insulating material is placed between the first connection terminal 46 and the coil 10 and first shield member 30. It's good that it has been done. More specifically, the first connection terminal 46 may be coated with an insulating material. Similarly, an insulating material may be disposed between the second connection terminal 47 and the coil 10 and first shield member 30.
• the second connection terminal 47 may be coated with an insulating material.
• an insulating material covering the first connection terminal 46 and/or the second connection terminal 47 for example, fluororesin can be used. Thereby, while ensuring the insulation between the first connection terminal 46 and/or the second connection terminal 47 and the coil 10 and the first shield member 30, the first connection terminal 46 and/or the second connection terminal 47 can be heat dissipation can be effectively promoted.
• the first connection terminal 46 when the first connection terminal 46 is connected to the inner end portion 10e1 of the coil 10, the first connection terminal 46 is connected to the inner end 10e1 of the coil 10 in a gap extending from the inner side to the outer side of the coil 10 when viewed in the axial direction. It may extend to overlap with 50.
• the first connection terminal 46 may extend from the inside of the coil 10 to the outside at a height position overlapping the small shield piece 30P in a side view of the coil unit 5. In this case, loss (heat generation) of the first shield member 30 can be suppressed.
• the connection terminals 46, 47 may be connected to the coil 10 via a conductive connection 48.
• the first connecting terminal 46 When the first connecting terminal 46 extends within the gap 50 extending from the inside to the outside of the coil 10, the first connecting terminal 46 and the straight portion 11 that the first connecting terminal 46 crosses when viewed in the axial direction.
• the angle may be, for example, 80° to 100°.
• the first connection terminal 46 may be orthogonal to the straight portion 11. In this case, lines of magnetic force formed around the linear portion 11 are prevented from reaching the second shield member 40 through the gap 50 through which the first connection terminal 46 passes.
• the first connection terminal 46 and the second connection terminal 47 extend from the same side of the second shield member 40 when viewed in the axial direction (see FIG. 2). . In this case, it is easy to route the wiring connected to the first connection terminal 46 and the second connection terminal 47.
• the shape of the second shield member 40 is not limited, and if the first connecting terminal 46 and the second connecting terminal 47 have the following positional relationship, the first connecting terminal 46 and the second connecting terminal 47 can be connected. Wiring is easy to route. That is, as shown in FIG. 6B, the point where the first connection terminal 46 and the outer peripheral edge of the first shield member 30 overlap when seen in the axial direction is defined as a first point IP1. Further, when viewed in the axial direction, the point where the second connection terminal 47 and the outer peripheral edge of the first shield member 30 overlap is defined as a second point IP2.
• the angle ⁇ formed by the first imaginary line IL1 connecting the first point IP1 and the central axis C and the second imaginary line IL2 connecting the second point IP2 and the central axis C is 90° or less, preferably 60° or less, more preferably 45° or less, even more preferably 30° or less.
• the shape of the second shield member 40 is not limited, and the distance between the first point IP1 and the second point IP2 is preferably 100 mm or less, and more preferably 50 mm or less.
• the end portions 10e1 and 10e2 of the coil element 10i have the following positional relationship. That is, when the direction in which the coil element 10i revolves around the central axis C from the outer end 10e2 to the inner end 10e1 is the first rotation direction CD, the outer end 10e2 is the inner end. It is shifted from the portion 10e1 in the first rotation direction CD. As a result, when viewed in the axial direction, the outer end region of the coil element 10i (in the example shown in FIG. 5B, the fourth straight portion 14 of the eighth turn portion) and the first connection terminal 46 can be prevented from intersecting with each other. The first point IP1 and the second point IP2 can be brought closer to each other. Since the outer end region of the coil element 10i and the first connection terminal 46 do not intersect, the loss (heat generation) of the coil unit 5 can be reduced.
• first straight portion 11 and the fourth straight portion 14 form the ends of the coil element 10i, but the present invention is not limited to this. Any of the first to fourth straight parts 11 to 14 may form the end of the coil element 10i.
• FIGS. 8 to 16 illustration of the first connection terminal 46 and the second connection terminal 47 is omitted.
• the first shield member 30 includes two shield pieces 31 to 32.
• Each shield piece 31-32 has a rectangular shape.
• the gap 50 formed between the adjacent shield pieces 31 and 32 crosses a part of the first linear section group 11G and the third linear section group 13G when viewed in the axial direction.
• the gap 50 is formed at a position overlapping the central axis C when viewed in the axial direction.
• Such a coil unit 5 can also suppress an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50, and can suppress a decrease in performance of the coil unit 5 due to the presence of the gap 50.
• the gap 50 is orthogonal to the first linear portion group 11G and the third linear portion group 13G when viewed in the axial direction.
• the first shield member 30 includes six shield pieces 31 to 36.
• Each of the shield pieces 31 to 36 has a rectangular shape.
• Two of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it extends between the first straight portion group 11G and the central axis C.
• two of the seven gaps 50 extend between the third linear portion group 13G and the central axis C when viewed in the axial direction.
• the first shield member 30 includes four shield pieces 31 to 34.
• Each of the shield pieces 31 to 34 has a rectangular shape.
• One of the three gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34 crosses the first linear portion group 11G when viewed in the axial direction. This gap 50 is perpendicular to the first straight portion group 11G when viewed in the axial direction.
• one of the other two gaps 50 extends along the second straight portion 12 within the second straight portion group 12G when viewed in the axial direction. Further, the other of the other two gaps 50 extends within the fourth straight portion group 14 along the fourth straight portion 14 .
• the gap 50 extends within any of the straight portion groups 11G to 14G when viewed in the axial direction, along the straight portions 11 to 14 constituting the straight portion groups 11G to 14G.
• the increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 becomes larger as the gap 50 approaches the center in the radial direction of the straight portion groups 11G to 14G. Therefore, as shown in FIG. 10, the gap 50 extending within the second straight part group 12G is the innermost second straight part 12 (the second straight part 12) of the plurality of second straight parts 12 of the second straight part group 12G.
• the gap 50 extending within the second straight part group 12G is the outermost second straight part 12 (the second straight part 12) of the plurality of second straight parts 12 of the second straight part group 12G.
• the gap 50 extending within the second linear portion group 12G is preferably located inward in the radial direction from the second linear portion 12 of the third turn portion 103.
• the gap 50 extending within the second linear portion group 12G is preferably located radially outward from the second linear portion 12 of the sixth turn portion 106, as shown in FIG.
• the gap 50 extending within the fourth straight portion group 14G is the innermost fourth straight portion 14 (
• the center axis C of the fourth straight part 14 of the first turn part 101 is larger than the fourth straight part 14 of the smallest integer that is equal to or greater than the value obtained by dividing the total number of the plurality of fourth straight parts 14 by 3. It is preferable that it extends on the side (inward in the radial direction).
• the gap 50 extending within the fourth straight part group 14G is the outermost fourth straight part 14 (the fourth straight part 14) of the plurality of fourth straight parts 14 of the fourth straight part group 14G.
• it extends on the opposite side (radially outward).
• the total number of fourth straight portions 14 in the fourth straight portion group 14G is eight.
• the smallest integer greater than or equal to 8 divided by 3 is 3. Therefore, it is preferable that the gap 50 extending within the fourth linear portion group 14G is located radially inward from the fourth linear portion 14 of the third turn portion 103, as shown in FIG.
• the gap 50 extending within the fourth straight part group 14G is preferably located radially outward from the fourth straight part 14 of the sixth turn part 106.
• the first shield member 30 includes six shield pieces 31-36. Each of the shield pieces 31 to 36 has a rectangular shape. Three of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crosses a part of the first straight part group 11G and/or a part of the third straight part group 13G.
• These three gaps 50 are perpendicular to a part of the first straight part group 11G and/or a part of the third straight part group 13G when viewed in the axial direction. Moreover, one of the other gaps 50 extends along the first straight portion 11 within the first straight portion group 11G when viewed in the axial direction. Moreover, the other two of the other gaps extend along the third straight part 13 within the third straight part group 13G.
• the gap 50 extending within the first straight portion group 11G is defined by the innermost first straight portion 11 ( The center axis C of the first straight part 11 of the first straight part 11) of the first turn part 101 is smaller than the first straight part 11 of the smallest integer number equal to or greater than the value obtained by dividing the total number of the plurality of first straight parts 11 by 3. It is preferable that it extends on the side (inward in the radial direction).
• the gap 50 extending within the first straight portion group 11G is the outermost first straight portion of the plurality of first straight portions 11 of the first straight portion group 11G.
• the gap 50 extending within the first straight portion group 11G may be located radially inward from the first straight portion 11 of the third turn portion 103.
• the gap 50 extending within the first straight portion group 11G may be located radially outward from the first straight portion 11 of the sixth turn portion 106, as shown in FIGS. 15 and 16. preferable.
• the gap 50 extending within the third straight portion group 13G is the innermost third straight line of the plurality of third straight portions 13 of the third straight portion group 13G. 13 (the third straight part 13 of the first turn part 101), the center Preferably, it extends on the axis C side (inward in the radial direction).
• the gap 50 extending within the third straight part group 13G is the outermost third straight part of the plurality of third straight parts 13 of the third straight part group 13G. 13 (the third straight line part 13 of the eighth turn part 108), the center axis line It is preferable that it extends on the side opposite to the side of C (radially outward).
• the total number of third straight portions 13 in the third straight portion group 13G is eight.
• the smallest integer greater than or equal to 8 divided by 3 is 3. Therefore, as shown in FIGS. 12 and 13, the gap 50 extending within the third straight portion group 13G may be located radially inward from the third straight portion 13 of the third turn portion 103. preferable.
• the gap 50 extending within the third straight portion group 13G may be located radially outward from the third straight portion 13 of the sixth turn portion 106, as shown in FIGS. 15 and 16. preferable.
• the coil 10 may include a plurality of spiral coil elements 10j, 10jj.
• the coil 10 includes two first coil elements 10j and second coil elements 10jj arranged in the axial direction.
• the pitch P of the first coil element 10j and the second coil element 10jj along the axial direction is, for example, 5 mm or more and 40 mm or less.
• each coil element 10j, 10jj includes a conductor 10E having a spiral shape.
• the conductor 10E includes a plurality of turn portions 101 to 105 arranged in the radial direction.
• the conductor 10E includes first to fifth turn portions 101 to 105.
• the first to fifth turn portions 101 to 105 are arranged in this order from the inside to the outside in the radial direction.
• the first turn part 101 is located at the innermost position in the radial direction
• the fifth turn part 105 is located at the outermost position in the radial direction.
• the first turn portion 101 forms the innermost peripheral portion of each coil element 10j, 10jj.
• the fifth turn portion 105 forms the outermost periphery of each coil element 10j, 10jj.
• Each turn portion 101 to 105 of each coil element 10j, 10jj extends on a virtual plane perpendicular to the axial direction.
• the first to fifth turn portions 101 to 105 are connected in this order, so that the coil elements 10j and 10jj form a spiral shape around the central axis C.
• each coil element 10j, 10jj (conductor 10E) is wound so that each turn portion 101 to 105 generally forms a rectangle, but this is not restrictive.
• Each of the turn portions 101 to 105 may be wound so as to substantially form a polygon other than a quadrangle.
• the first to fifth turn portions 101 to 105 of the first coil element 10j are axially connected to the first to fifth turn portions 101 to 105 of the second coil element 10jj, respectively. aligned in the direction.
• Each turn portion 101 to 105 of each coil element 10j, 10jj includes a plurality of straight portions 11 to 13 arranged around the central axis C. Straight portions 11 to 13 adjacent in the circumferential direction of a circle centered on the central axis C are connected to each other.
• the first to fifth turn parts 101 to 105 include a first straight part 11 and a third straight part 13 extending in the first direction D1, and a second straight part 12 extending in the second direction D2. include.
• the first to fourth turn portions 101 to 104 of each coil element 10j, 10jj include a turn connection portion 16. The first to fourth turn portions 101 to 104 are connected to the second to fifth turn portions 102 to 105 at their turn connection portions 16, respectively.
• the first direction D1 and the second direction D2 are non-parallel to each other.
• the first direction D1 and the second direction D2 are orthogonal.
• the first straight part 11 and the third straight part 13 are arranged so that the central axis C passes therebetween.
• the second straight portion 12 and the turn connection portion 16 are arranged such that the central axis C passes therebetween.
• each of the turn parts 101 to 105 of the first coil element 10j the adjacent ends of the first straight part 11 and the second straight part 12 are connected to each other via a first A intermediate curved part 151 that curves along the circumferential direction. It is connected.
• the adjacent ends of the second straight part 12 and the third straight part 13 are connected to each other through a first B intermediate curved part 152 that curves along the circumferential direction. connected.
• adjacent ends of the first straight portion 11 and the turn connection portion 16 form a 1D intermediate curved portion 154 that curves along the circumferential direction. connected via.
• turn connection portions 16 of the first to fourth turn portions 101 to 104 of the first coil element 10j are connected to each other of the first coil element 10j via the first C intermediate curved portion 153 that curves along the circumferential direction. It is connected to the third straight portion 13 of the second to fifth turn portions 102 to 105.
• adjacent ends of the first straight part 11 and the second straight part 12 are connected via the first A intermediate curved part 151.
• adjacent ends of the second straight part 12 and the third straight part 13 are connected via the 1B intermediate curved part 152.
• adjacent ends of the third straight portion 13 and the turn connection portion 16 are connected via the 1C intermediate curved portion 153. .
• turn connecting portions 16 of the first to fourth turn portions 101 to 104 of the second coil element 10jj are connected to the second to fifth turn portions of the second coil element 10jj via the first D intermediate curved portion 154, respectively. It is connected to the first straight portions 11 of 102 to 105.
• the first to third straight portions 11 to 13 and the turn connection portion 16 of the first turn portion 101 of the first coil element 10j are respectively connected to the first turn portion of the second coil element 10jj. It is aligned in the axial direction with the first to third straight parts 11 to 13 and the turn connection part 16 of 101. Further, the first to third straight portions 11 to 13 and the turn connection portion 16 of the second turn portion 102 of the first coil element 10j are connected to the first to third straight portions 11 to 13 of the second turn portion 102 of the second coil element 10jj, respectively. It is aligned in the axial direction with the straight portions 11 to 13 and the turn connection portion 16.
• first to third straight parts 11 to 13 and the turn connecting part 16 of the third turn part 103 of the first coil element 10j are connected to the first to third straight parts 11 to 13 of the third turn part 103 of the second coil element 10jj, respectively. It is aligned in the axial direction with the straight portions 11 to 13 and the turn connection portion 16. Further, the first to third straight portions 11 to 13 and the turn connection portion 16 of the fourth turn portion 104 of the first coil element 10j are connected to the first to third straight portions 11 to 13 of the fourth turn portion 104 of the second coil element 10jj, respectively. It is aligned in the axial direction with the straight portions 11 to 13 and the turn connection portion 16. Further, the first to third straight portions 11 to 13 of the fifth turn portion 105 of the first coil element 10j are the first to third straight portions 11 to 13 of the fifth turn portion 105 of the second coil element 10jj, respectively. are aligned in the axial direction.
• the third straight portion 13 of the first turn portion 101 located at the innermost position of the first coil element 10j and the first turn portion located at the innermost position of the second coil element 10jj The first straight portion 11 of 101 is electrically connected. Further, the first connection terminal 46 is connected to the first straight portion 11 of the fifth turn portion 105 located at the outermost side of the first coil element 10j. Further, the second connection terminal 47 is connected to the third straight portion 13 of the fifth turn portion 105 located at the outermost side of the second coil element 10jj.
• the first coil element 10j forms the first main surface 10a of the coil 10.
• the second coil element 10jj forms the second main surface 10b of the coil 10.
• the magnetic resin layer 20 is in direct contact with the second main surface 10b of the coil 10. In other words, the magnetic resin layer 20 is in direct contact with the conductor 10E of the second coil element 10jj. In the illustrated example, the magnetic resin layer 20 is in close contact with the second main surface 10b of the coil 10. In other words, the magnetic resin layer 20 is in close contact with the conductor 10E of the second coil element 10jj.
• the coil 10 is embedded in a magnetic resin layer 20. In the example shown in FIG.
• the magnetic resin layer 20 is also in direct contact or in close contact with the surface facing the second side of the first coil element 10j.
• the present invention is not limited to this, and the magnetic resin layer 20 may not be in direct contact with or in close contact with the surface of the first coil element 10j facing the second side.
• the first shield member 30 includes nine shield pieces 31 to 39.
• Each of the shield pieces 31 to 39 has a rectangular shape.
• Adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 37; 37, 38; 38, 31; 32, 39; 34, 39; 36, 39; 38, Two of the twelve gaps 50 formed between the coil elements 39 cross the first linear portion group 11G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction. These two gaps 50 are orthogonal to the first linear portion group 11G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction.
• two of the twelve gaps 50 cross the second linear portion group 12G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction. These two gaps 50 are perpendicular to the second linear portion group 12G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction. Furthermore, two of the twelve gaps 50 cross the third linear portion group 13G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction. These two gaps 50 are perpendicular to the third linear portion group 13G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction. Furthermore, four of the twelve gaps 50 are located radially inward from the first turn portion 101 located at the innermost position of the coil elements 10j, 10jj when viewed in the axial direction.
• the first shield member 30 includes the gap 50 that crosses any one of the linear portion groups 11G to 14G of the coil elements 10i; 10j, 10jj, but is not limited to this.
• the first shield member 30 does not need to include the gap 50 that crosses the linear portion groups 11G to 14G.
• the first shield member 30 does not include a gap 50 that crosses the first to fourth linear portion groups 11G to 14G of the coil elements 10j and 10jj.
• the first shield member 30 includes nine shield pieces 31 to 39.
• Each of the shield pieces 31 to 39 has a rectangular shape.
• two of the twelve gaps 50 formed between the first coil element 10j and the second coil element 10jj cross the first A intermediate curved portion group 151G.
• two of the twelve gaps 50 cross the first B intermediate curve group 152G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction.
• two of the twelve gaps 50 cross the first C intermediate curve group 153G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction. Furthermore, two of the twelve gaps 50 cross the first D intermediate curve group 154G of the first coil element 10j and the second coil element 10jj when viewed in the axial direction.
• the first shield member 30 has a gap 50 that crosses the first to fourth linear portion groups 11G to 14G of the coil elements 10i and 10j, and the first to first D intermediate curves. It may include both the gap 50 that crosses the group of parts 151G to 154G.
• the first shield member 30 includes eight shield pieces 31 to 38.
• Each shield piece 31-38 has a triangular shape. More specifically, each shield piece 31-38 has the shape of a right triangle.
• 1st to 8th gaps 51 to 58 formed between adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 37; 37, 38; 38, 31 extend radially from the central axis C.
• the gaps 51, 53, 55, and 57 each cross at least a portion of the first A to first D intermediate curved portion groups 151G to 154G.
• the gaps 51, 53, 55, and 57 cross the first A to first D intermediate curved portion groups 151G to 154G, respectively.
• the gaps 51, 53, 55, and 57 each extend from radially inward to radially outward from the 1A to 1D intermediate curved portion groups 151G to 154G. ing.
• the shield pieces 31 and 32 By arranging the shield pieces 31 and 32 so that the first gap 51 crosses the first A intermediate curved portion 151, the lines of magnetic force formed around each of the first A intermediate curved portions 151 pass through the second gap 52 to the first A intermediate curved portion 151. 2 shield member 40 is suppressed. Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the first A intermediate curved portion 151. This means that it is possible to suppress an increase in loss (heat generation) of the coil unit 5 due to the presence of the first gap 51, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the first gap 51. It means that.
• the angle between the first gap 51 and the tangent TL1 of the first A intermediate curved portion group 151G may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the first gap 51 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the first gap 51 can be effectively suppressed. be able to.
• the first gap 51 when viewed in the axial direction, may be orthogonal to the tangent TL1 of the first A intermediate curve section group 151G.
• the shield pieces 33 and 34 are arranged so that the third gap 53 crosses the first B intermediate curved portion 152, the lines of magnetic force formed around each of the first B intermediate curved portions 152 are It is suppressed from reaching the second shield member 40 through the second shield member 40 . Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the first B intermediate curved portion 152. This means that an increase in loss (heat generation) of the coil unit 5 due to the presence of the third gap 53 can be suppressed, and a decrease in performance of the coil unit 5 due to the presence of the third gap 53 can be suppressed. It means that.
• the angle formed by the third gap 53 and the tangent TL2 of the first B intermediate curved portion group 152G may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the third gap 53 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the third gap 53 can be effectively suppressed. be able to.
• the third gap 53 when viewed in the axial direction, may be orthogonal to the tangent TL2 of the first B intermediate curved portion group 152G.
• the shield pieces 35 and 36 are arranged so that the fifth gap 55 crosses the first C intermediate curved portion 153, the lines of magnetic force formed around each of the first C intermediate curved portions 153 are It is suppressed from reaching the second shield member 40 through the second shield member 40 . Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the first C intermediate curved portion 153. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the presence of the fifth gap 55, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the fifth gap 55. It means that.
• the angle formed by the fifth gap 55 and the tangent TL3 of the first C intermediate curved portion group 153G may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the fifth gap 55 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the fifth gap 55 can be effectively suppressed. be able to.
• the fifth gap 55 when viewed in the axial direction, may be orthogonal to the tangent TL3 of the first C intermediate curved portion group 153G.
• the shield pieces 37 and 38 are arranged so that the seventh gap 57 crosses the first D intermediate curved section 154, the lines of magnetic force formed around each of the first D intermediate curved sections 154 are It is suppressed from reaching the second shield member 40 through the second shield member 40 . Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the first D intermediate curved portion 154. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the presence of the seventh gap 57, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the seventh gap 57. It means that.
• the angle between the seventh gap 57 and the tangent TL4 of the first D intermediate curved portion group 154G may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the seventh gap 57 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the seventh gap 57 can be effectively suppressed. be able to.
• the seventh gap 57 may be orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G when viewed in the axial direction.
• the increase in loss (heat generation) of the coil unit 5 due to the existence of the seventh gap 57 can be further effectively suppressed, and the deterioration in the performance of the coil unit 5 due to the existence of the seventh gap 57 can be further effectively suppressed. Can be suppressed.
• a tangent to a group of curved portions means a tangent to a curved portion constituting the group of curved portions when viewed in the axial direction. Therefore, the tangents TL1 to TL4 of the first A to first D intermediate curved portion groups 151G to 154G are tangents to the first A to first D intermediate curved portions 151 to 154, respectively.
• the gaps 52, 54, and 58 each cross at least a portion of the first to third linear portion groups 11G to 13G.
• the gaps 52, 54, and 58 cross the first to third linear portion groups 11G to 13G, respectively.
• the gaps 52, 54, and 58 extend from radially inward to radially outward relative to the first to third linear portion groups 11G to 13G, respectively.
• the angle formed by the eighth gap 58 and the first straight portion 11 is 80° to 100°. More specifically, the eighth gap 58 is perpendicular to the first straight portion 11 . Furthermore, when viewed in the axial direction, the angle formed by the second gap 52 and the second straight portion 12 is 80° to 100°. More specifically, the second gap 52 is perpendicular to the second straight portion 12 . Further, when viewed in the axial direction, the angle formed by the fourth gap 54 and the third straight portion 13 is 80° to 100°. More specifically, the fourth gap 54 is perpendicular to the third straight portion 13.
• the sixth gap 56 crosses at least a portion of the fourth straight portion group 14G when viewed in the axial direction.
• the sixth gap 56 crosses the fourth straight portion group 14G.
• each of the sixth gaps 56 extends from radially inward to radially outward of the fourth straight portion group 14G.
• the angle formed by the sixth gap 56 and the fourth straight portion 14 is 80° to 100° when viewed in the axial direction. More specifically, the sixth gap 56 is perpendicular to the fourth straight portion 14 .
• the angle formed by the gap 50 that crosses the first intermediate curved portion group 151G to 154G and the tangents TL1 to TL4 of the first intermediate curved portion group 151G to 154G when viewed in the axial direction. is 80° to 100°.
• the gap 50 that crosses the first intermediate curved portion groups 151G to 154G is perpendicular to the tangents TL1 to TL4 of the first intermediate curved portion groups 151G to 154G. There is.
• a plurality of shields are arranged such that the angle between the gap 50 crossing the first intermediate curved portion group 151G to 154G and the tangents TL1 to TL4 of the first intermediate curved portion group 151G to 154G is 80° to 100°.
• various layouts or various manners in which the first shield member 30 is divided
• the circumferentially adjacent straight line portion groups 11G, 12G; 12G, 13G; 13G, 14G; 14G, 11G are connected via the first intermediate curved portion groups 151G to 154G; Not limited.
• the circumferentially adjacent straight portion groups 11G, 12G; 12G, 13G; 13G, 14G; 14G, 11G are connected via first intermediate straight portion groups 161G to 164G. There is.
• the coil element 10i has an octagonal shape as a whole.
• the coil element 10i (conductor 10E) is wound so that each of the turn portions 101 to 108 generally forms an octagon.
• the first to eighth turn parts 101 to 108 include first intermediate straight parts 161 to 164 in addition to the first to fourth straight parts 11 to 14.
• the first A intermediate straight portion 161 and the first C intermediate straight portion 163 extend in the third direction D3.
• the third direction D3 is non-parallel to any of the first and second directions D1 and D2.
• the first B intermediate straight portion 162 and the first D intermediate straight portion 164 extend in the fourth direction D4.
• the fourth direction D4 is non-parallel to any of the first to third directions D1 to D3.
• adjacent ends of the first straight part 11 and the second straight part 12 are connected via the first A intermediate straight part 161.
• adjacent ends of the second straight part 12 and the third straight part 13 are connected via the 1B intermediate straight part 162.
• adjacent ends of the third straight part 13 and the fourth straight part 14 are connected via a first C intermediate straight part 163.
• the adjacent ends of the fourth straight part 14 of the first turn part 101 and the first straight part 11 of the second turn part 102 are connected via the first D intermediate straight part 164.
• the adjacent ends of the fourth straight part 14 of the second turn part 102 and the first straight part 11 of the third turn part 103 are connected via a first D intermediate straight part 164.
• the first A intermediate straight portions 161 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first A intermediate straight portion group 161G. Further, the first B intermediate straight portions 162 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first B intermediate straight portion group 162G. Further, the 1C intermediate straight portions 163 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a 1C intermediate straight portion group 163G. Further, the first D intermediate straight portions 164 of the plurality of turn portions 101 to 108 are arranged in the radial direction to form a first D straight portion group 164G.
• the radially adjacent first intermediate straight portions 161, 161; 162, 162; 163, 163; 164, 164 are spaced apart from each other in the radial direction.
• the first A to first D intermediate straight line portion groups 161G to 164G are parallel straight line groups consisting of a plurality of first A to first D intermediate straight portions 161 to 164, respectively.
• the coil element 10i has an octagonal shape as a whole.
• the coil element 10i (conductor 10E) is wound so that each of the turn portions 101 to 108 generally forms an octagon.
• the coil element 10i includes eight linear portion groups 11 to 14 and 161 to 164 extending along the eight sides of the octagon.
• the angle formed by the first straight portion 11 and the first A intermediate straight portion 161 is 125° to 145° when viewed in the axial direction. Further, when viewed in the axial direction, the angle formed by the first A intermediate straight portion 161 and the second straight portion 12 is 125° to 145°.
• the angle formed by the second straight portion 12 and the first B intermediate straight portion 162 is 125° to 145°.
• the angle formed by the first B intermediate straight portion 162 and the third straight portion 13 is 125° to 145°.
• the angle formed by the third straight portion 13 and the first C intermediate straight portion 163 is 125° to 145°.
• the angle formed by the first C intermediate straight portion 163 and the fourth straight portion 14 is 125° to 145°.
• the angle formed by the fourth straight portion 14 and the first D intermediate straight portion 164 is 125° to 145°.
• the angle formed by the first D intermediate straight portion 164 and the first straight portion 11 is 125° to 145°.
• the angle between the first straight portion 11 and the first A intermediate straight portion 161 is 135° when viewed in the axial direction. Further, when viewed in the axial direction, the angle between the first A intermediate straight portion 161 and the second straight portion 12 is 135°. Further, when viewed in the axial direction, the angle formed by the second straight portion 12 and the first B intermediate straight portion 162 is 135°. Further, when viewed in the axial direction, the angle formed by the first B intermediate straight portion 162 and the third straight portion 13 is 135°. Further, when viewed in the axial direction, the angle formed by the third straight portion 13 and the first C intermediate straight portion 163 is 135°.
• the angle formed by the first C intermediate straight portion 163 and the fourth straight portion 14 is 135°. Further, when viewed in the axial direction, the angle formed by the fourth straight portion 14 and the first D intermediate straight portion 164 is 135°. Further, when viewed in the axial direction, the angle between the first D intermediate straight portion 164 and the first straight portion 11 is 135°.
• the coil element 10i has a regular octagonal shape as a whole.
• the coil element 10i (conductor 10E) is wound so that each of the turn portions 101 to 108 generally forms a regular octagon.
• the coil element 10i includes eight linear portion groups 11 to 14 and 161 to 164 extending along eight sides of a regular octagon. Thereby, the performance of the coil 10 can be improved.
• circumferentially adjacent straight portions 11 to 14 and the first intermediate straight portions 161 to 164 may be connected by curved portions.
• the first shield member 30 includes first to fourth shield pieces 31 to 34, similar to the examples shown in FIGS. 2 to 5B. Each of the shield pieces 31 to 34 has a rectangular shape.
• first to fourth gaps 51 to 54 are formed. The first to fourth gaps 51 to 54 each cross at least a portion of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction. In the example shown in FIG. 26, the first to fourth gaps 51 to 54 cross the first to fourth straight portion groups 11G to 14G, respectively, when viewed in the axial direction.
• the angle formed by the first gap 51 and the first straight portion 11 of the first straight portion group 11G may be, for example, 80° to 100° when viewed in the axial direction.
• the angle between the second gap 52 and the second straight portion 12 of the second straight portion group 12G may be, for example, 80° to 100°.
• the angle formed by the third gap 53 and the third straight portion 13 of the third straight portion group 13G may be, for example, 80° to 100°.
• the angle formed by the fourth gap 54 and the fourth straight portion 14 of the fourth straight portion group 14G may be, for example, 80° to 100°.
• the first gap 51 may be orthogonal to the first straight portion 11 of the first straight portion group 11G when viewed in the axial direction.
• the second gap 52 may be orthogonal to the second straight portion 12 of the second straight portion group 12G.
• the third gap 53 may be perpendicular to the third straight portion 13 of the third straight portion group 13G.
• the fourth gap 54 may be perpendicular to the fourth straight portion 14 of the fourth straight portion group 14G.
• the first shield member 30 includes twelve shield pieces 30P. Seventeen gaps 50 are formed in the first shield member 30 .
• 14 of the 17 gaps 50 are the first to fourth linear portion groups 11G to 14G and/or the 1A to 1D intermediate linear portion groups 161G. It traverses at least a portion of ⁇ 164G.
• Two of the fourteen gaps 50 cross the first linear section group 11G or the third linear section group 13G.
• the angle formed by the gap 50 that crosses the first straight portion group 11G and the first straight portion group 11G is 80° to 100°, and more specifically, It is 90°.
• the angle formed by the gap 50 that crosses the third straight portion group 13G and the third straight portion group 13G is 80° to 100°. is 90°.
• one of the seventeen gaps 50 extends within the second linear portion group 12G and along the second linear portion group 12G.
• the gap 50 extending within the second straight part group 12G is the innermost second straight part 12 of the plurality of second straight parts 12 of the second straight part group 12G (the second straight part of the first turn part 101). 12), extending on the side of the central axis C (inward in the radial direction) from the second straight part 12 of the smallest integer number equal to or more than the value obtained by dividing the total number of the plurality of second straight parts 12 by 3. ing.
• one of the seventeen gaps 50 extends within the fourth linear portion group 14G and along the second linear portion group 14G.
• the gap 50 extending within the fourth straight part group 14G is the innermost fourth straight part 14 (the fourth straight part of the first turn part 101) of the plurality of fourth straight parts 14 of the fourth straight part group 14G. 14) Extending on the side of the central axis C (inward in the radial direction) from the fourth straight part 14 of the smallest integer number equal to or more than the value obtained by dividing the total number of the plurality of fourth straight parts 14 by 3. ing.
• one of the seventeen gaps 50 does not cross the coil 10.
• the first shield member 30 includes eight shield pieces 31 to 38.
• Each shield piece 31-38 has a triangular shape. More specifically, each shield piece 31-38 has the shape of a right triangle.
• 1st to 8th gaps 51 to 58 formed between adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 37; 37, 38; 38, 31 extend radially from the central axis C.
• the gaps 51, 53, 55, and 57 each cross at least a portion of the first A to first D intermediate straight portion groups 161G to 164G.
• the gaps 51, 53, 55, and 57 cross the 1A to 1D intermediate straight portion groups 161G to 164G, respectively, when viewed in the axial direction.
• the gaps 51, 53, 55, and 57 extend from radially inward to radially outward from the 1A to 1D intermediate straight portion groups 161G to 164G, respectively. ing.
• the angle formed by the first gap 51 and the first A intermediate straight portion 161 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the first gap 51 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the first gap 51 can be effectively suppressed.
• the first gap 51 may be orthogonal to the first A intermediate straight portion 161 when viewed in the axial direction.
• the shield pieces 33 and 34 are arranged so that the third gap 53 crosses the first B intermediate linear portion 162, the lines of magnetic force formed around each of the first B intermediate linear portions 162 are It is suppressed from reaching the second shield member 40 through the second shield member 40 .
• the angle formed by the third gap 53 and the first B intermediate straight portion 162 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the third gap 53 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the third gap 53 can be effectively suppressed. be able to.
• the third gap 53 may be perpendicular to the first B intermediate straight portion 162 when viewed in the axial direction.
• the shield pieces 35 and 36 are arranged so that the fifth gap 55 crosses the first C intermediate linear portion 163, the lines of magnetic force formed around each of the first C intermediate linear portions 163 are It is suppressed from reaching the second shield member 40 through the second shield member 40 .
• the angle formed by the fifth gap 55 and the first C intermediate straight portion 163 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the fifth gap 55 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the fifth gap 55 can be effectively suppressed.
• the fifth gap 55 may be orthogonal to the first C intermediate straight portion 163 when viewed in the axial direction.
• the shield pieces 37 and 38 are arranged so that the seventh gap 57 crosses the first D intermediate linear section 164, the lines of magnetic force formed around each of the first D intermediate linear sections 164 are It is suppressed from reaching the second shield member 40 through the second shield member 40 . Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the first D intermediate straight portion 164. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the presence of the seventh gap 57, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the seventh gap 57. It means that.
• the angle formed by the seventh gap 57 and the first D intermediate straight portion 164 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the seventh gap 57 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the seventh gap 57 can be effectively suppressed. be able to.
• the seventh gap 57 may be orthogonal to the first D intermediate straight portion 164 when viewed in the axial direction.
• the increase in loss (heat generation) of the coil unit 5 due to the existence of the seventh gap 57 can be further effectively suppressed, and the deterioration of the performance of the coil unit 5 due to the existence of the seventh gap 57 can be further effectively suppressed. Can be suppressed.
• the gaps 58, 52, 54, and 56 each cross at least a portion of the first to fourth linear portion groups 11G to 14G.
• the gaps 58, 52, 54, and 56 cross the first to fourth linear portion groups 11G to 14G, respectively.
• the gaps 58, 52, 54, and 56 extend from radially inward to radially outward relative to the first to fourth linear portion groups 11G to 14G, respectively.
• the angle formed by the eighth gap 58 and the first straight portion 11 is 80° to 100°. More specifically, the eighth gap 58 is perpendicular to the first straight portion 11 . Furthermore, when viewed in the axial direction, the angle formed by the second gap 52 and the second straight portion 12 is 80° to 100°. More specifically, the second gap 52 is perpendicular to the second straight portion 12 . Furthermore, when viewed in the axial direction, the angle formed by the fourth gap 54 and the third straight portion 13 is 80° to 100°. More specifically, the fourth gap 54 is perpendicular to the third straight portion 13. Further, when viewed in the axial direction, the angle formed by the sixth gap 56 and the fourth straight portion 14 is 80° to 100°. More specifically, the sixth gap 56 is perpendicular to the fourth straight portion 14 .
• the angle formed by the gap 50 that crosses the first intermediate straight portion groups 161G to 164G and the first intermediate straight portions 161 to 164 is 80° to 100°. .
• the gap 50 that crosses the first intermediate straight portion groups 161G to 164G is orthogonal to the first intermediate straight portions 161 to 164. In this way, the layout (or , the manner in which the first shield member 30 is divided), various layouts (or various manners in which the first shield member 30 is divided) can be adopted.
• the coil 10 includes a plurality of spiral coil elements 10j, 10jj, similar to the coil 10 shown in FIGS. 17 to 19.
• the coil elements 10j, 10jj shown in FIGS. 30 to 33 have an octagonal shape as a whole, similar to the coil element 10i shown in FIGS. 26 to 29.
• the coil elements 10j, 10jj (conductor 10E) are wound so that each of the turn portions 101 to 108 generally forms an octagon.
• the first to fifth turn portions 101 to 105 of each coil element 10j, 10jj are connected to the first to third straight portions 11 to 13 and the plurality of turn connection portions 16, 1 intermediate straight portions 161 to 164 are included.
• the first A intermediate straight portion 161 and the first C intermediate straight portion 163 extend in the third direction D3.
• the third direction D3 is non-parallel to any of the first and second directions D1 and D2.
• the first B intermediate straight portion 162 and the first D intermediate straight portion 164 extend in the fourth direction D4.
• the fourth direction D4 is non-parallel to any of the first to third directions D1 to D3.
• each turn portion 101 to 105 of each coil element 10j, 10jj adjacent ends of the first straight portion 11 and the second straight portion 12 are connected via the first A intermediate straight portion 161.
• adjacent ends of the second straight part 12 and the third straight part 13 are connected via the 1B intermediate straight part 162.
• adjacent ends of the third straight portion 13 and the plurality of turn connection portions 16 are connected via a 1C intermediate straight portion 163.
• adjacent ends of the first straight portion 11 and the plurality of turn connection portions 16 are connected via a 1D intermediate straight portion 164.
• the first A intermediate straight portions 161 of the plurality of turn portions 101 to 105 are arranged in the radial direction to form a first A intermediate straight portion group 161G.
• the first B intermediate straight portions 162 of the plurality of turn portions 101 to 105 are arranged in the radial direction to form a first B intermediate straight portion group 162G.
• the first C intermediate straight portions 163 of the plurality of turn portions 101 to 105 are arranged in the radial direction to form a first C intermediate straight portion group 163G.
• the first D intermediate straight portions 164 of the plurality of turn portions 101 to 105 are arranged in the radial direction to form a first D straight portion group 164G.
• the radially adjacent first intermediate straight portions 161, 161; 162, 162; 163, 163; 164, 164 are spaced apart from each other in the radial direction.
• the first A to first D intermediate straight line portion groups 161G to 164G are parallel straight line groups consisting of a plurality of first A to first D intermediate straight portions 161 to 164, respectively.
• the coil elements 10j, 10jj have an octagonal shape as a whole.
• the coil elements 10j, 10jj (conductor 10E) are wound so that each of the turn portions 101 to 105 generally forms an octagon.
• the coil elements 10j, 10jj include seven linear portion groups 11-13, 161-164 extending along seven of the eight sides of the octagon.
• the angle between the first straight portion 11 and the first A intermediate straight portion 161 is 125° to 145° when viewed in the axial direction.
• the angle formed by the first A intermediate straight portion 161 and the second straight portion 12 is 125° to 145°.
• the angle formed by the second straight portion 12 and the first B intermediate straight portion 162 is 125° to 145°.
• the angle formed by the first B intermediate straight portion 162 and the third straight portion 13 is 125° to 145°.
• the angle formed by the third straight portion 13 and the first C intermediate straight portion 163 is 125° to 145°.
• the angle formed by the first D intermediate straight portion 164 and the first straight portion 11 is 125° to 145°.
• the angle between the first straight portion 11 and the first A intermediate straight portion 161 is 135° when viewed in the axial direction. Further, when viewed in the axial direction, the angle between the first A intermediate straight portion 161 and the second straight portion 12 is 135°. Further, when viewed in the axial direction, the angle formed by the second straight portion 12 and the first B intermediate straight portion 162 is 135°. Further, when viewed in the axial direction, the angle formed by the first B intermediate straight portion 162 and the third straight portion 13 is 135°. Further, when viewed in the axial direction, the angle formed by the third straight portion 13 and the first C intermediate straight portion 163 is 135°. Further, when viewed in the axial direction, the angle between the first D intermediate straight portion 164 and the first straight portion 11 is 135°.
• the coil elements 10j, 10jj have a regular octagonal shape as a whole.
• the coil elements 10j, 10jj (conductor 10E) are wound so that each of the turn portions 101 to 105 generally forms a regular octagon.
• the coil elements 10j, 10jj include seven linear portion groups 11-13, 161-164 extending along seven of the eight sides of the regular octagon. Thereby, the performance of the coil 10 can be improved.
• the circumferentially adjacent straight portions 11 to 13 and the first intermediate straight portions 161 to 164 may be connected by curved portions.
• the first C intermediate straight portion 163 and the turn connecting portion 16 that are adjacent to each other in the circumferential direction may be connected by a curved portion.
• the first D intermediate straight portion 164 and the turn connecting portion 16 that are adjacent to each other in the circumferential direction may be connected by a curved portion.
• the first shield member 30 includes nine shield pieces 30P. Twelve gaps 50 are formed in the first shield member 30 . In the example shown in FIG. 30, when viewed in the axial direction, the twelve gaps 50 are located between the first to third linear portion groups 11G to 13G and/or the first to first D intermediate linear portion groups of each coil element 10j, 10jj. It crosses at least a portion of 161G to 164G.
• the first shield member 30 includes twelve shield pieces 30P. Seventeen gaps 50 are formed in the first shield member 30 .
• 13 of the 17 gaps 50 are located between the first to third linear portion groups 11G to 13G and/or the first A to 13G of each coil element 10j, 10jj. It traverses at least a portion of the first D intermediate straight portion group 161G to 164G.
• One of the thirteen gaps 50 crosses the second linear portion group 12G of each coil element 10j, 10jj.
• the angle formed by the gap 50 that crosses the second straight portion group 12G and the second straight portion group 12G is 80° to 100°, and more specifically, It is 90°.
• one of the seventeen gaps 50 extends within the first linear portion group 11G of each coil element 10j, 10jj along the first linear portion group 11G.
• the gap 50 extending within the first straight part group 11G is the innermost first straight part 11 of the plurality of first straight parts 11 of the first straight part group 11G (the first straight part of the first turn part 101). 11), extending on the side of the central axis C (inward in the radial direction) from the first straight part 11 of the smallest integer number equal to or greater than the value obtained by dividing the total number of the plurality of first straight parts 11 by 3. ing.
• one of the seventeen gaps 50 extends within the third linear portion group 13G of each coil element 10j, 10jj and along the third linear portion group 13G.
• the gap 50 extending inside the third straight part group 13G is the innermost third straight part 13 of the plurality of third straight parts 13 of the third straight part group 13G (the third straight part of the first turn part 101). 13), extending on the side of the central axis C (inward in the radial direction) from the third straight line part 13 of the smallest integer number equal to or more than the value obtained by dividing the total number of the plurality of third straight parts 13 by 3. ing.
• the first shield member 30 includes eight shield pieces 31 to 38, similar to the example shown in FIG.
• Each shield piece 31-38 has a triangular shape. More specifically, each shield piece 31-38 has the shape of a right triangle.
• 1st to 8th gaps 51 to 58 formed between adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 37; 37, 38; 38, 31 extend radially from the central axis C.
• the gaps 51, 53, 55, and 57 each cross at least a portion of the first A to first D intermediate straight portion groups 161G to 164G of each coil element 10j, 10jj.
• the gaps 51, 53, 55, and 57 cross the first A to first D intermediate straight portion groups 161G to 164G of each coil element 10j, 10jj, respectively.
• the gaps 51, 53, 55, and 57 extend from the radially inner side of the first A to first D intermediate straight portion groups 161G to 164G of each coil element 10j, 10jj, respectively. It extends outward.
• the angle formed by the first gap 51 and the first A intermediate straight portion 161 of each coil element 10j, 10jj may be, for example, 80° to 100°.
• the first gap 51 when viewed in the axial direction, may be perpendicular to the first A intermediate straight portion 161 of each coil element 10j, 10jj.
• the angle formed by the third gap 53 and the first B intermediate straight portion 162 of each coil element 10j, 10jj may be, for example, 80° to 100°.
• the third gap 53 may be perpendicular to the first B intermediate straight portion 162 of each coil element 10j, 10jj when viewed in the axial direction.
• the angle formed by the fifth gap 55 and the first C intermediate straight portion 163 of each coil element 10j, 10jj may be, for example, 80° to 100°. Further, as understood from FIG. 32, when viewed in the axial direction, the fifth gap 55 may be orthogonal to the first C intermediate straight portion 163 of each coil element 10j, 10jj.
• the angle formed by the seventh gap 57 and the first D intermediate straight portion 164 of each coil element 10j, 10jj may be, for example, 80° to 100°. Furthermore, as understood from FIG. 32, the seventh gap 57 may be perpendicular to the first D intermediate straight portion 164 of each coil element 10j, 10jj when viewed in the axial direction.
• the gaps 58, 52, and 54 each cross at least a portion of the first to third linear portion groups 11G to 13G of each coil element 10j, 10jj.
• the gaps 58, 52, and 54 cross the first to third linear portion groups 11G to 13G of each coil element 10j, 10jj, respectively.
• the gaps 58, 52, and 54 extend from radially inward to radially outward relative to the first to third linear portion groups 11G to 13G of each coil element 10j, 10jj, respectively. It extends over.
• the angle formed by the eighth gap 58 and the first straight portion 11 of each coil element 10j, 10jj is 80° to 100°. More specifically, the eighth gap 58 is orthogonal to the first straight portion 11 of each coil element 10j, 10jj. Furthermore, when viewed in the axial direction, the angle formed by the second gap 52 and the second straight portion 12 of each coil element 10j, 10jj is 80° to 100°. More specifically, the second gap 52 is orthogonal to the second straight portion 12 of each coil element 10j, 10jj. Further, when viewed in the axial direction, the angle formed by the fourth gap 54 and the third straight portion 13 of each coil element 10j, 10jj is 80° to 100°. More specifically, the fourth gap 54 is orthogonal to the third straight portion 13 of each coil element 10j, 10jj.
• the angle formed by the gap 50 that crosses the first intermediate straight portion groups 161G to 164G of each coil element 10j, 10jj and the first intermediate straight portions 161 to 164 is , 80° to 100°.
• the gap 50 that crosses the first intermediate straight portion groups 161G to 164G of each coil element 10j, 10jj is orthogonal to the first intermediate straight portions 161 to 164. .
• a plurality of coil elements 10j, 10jj are arranged such that the angle formed by the gap 50 that crosses the first intermediate straight portion group 161G to 164G and the first intermediate straight portion 161 to 164 is 80° to 100°.
• various layouts or various manners in which the first shield member 30 is divided
• the first intermediate straight portion groups 161G, 162G, 163G, 164G are connected to the straight portion groups 12G, 13G, 14G via the second intermediate straight portion groups 171G, 172G, 173G, 174G. , 11G.
• the coil element 10i includes a conductor 10E having a spiral shape.
• the conductor 10E includes a plurality of turn portions 101 to 107 arranged in the radial direction.
• the conductor 10E includes first to seventh turn portions 101 to 107.
• the first to seventh turn portions 101 to 107 are arranged in this order from the inside to the outside in the radial direction.
• the first turn part 101 is located at the innermost position in the radial direction
• the seventh turn part 107 is located at the outermost position in the radial direction.
• the first turn portion 101 forms the innermost peripheral portion of the coil element 10i.
• the seventh turn portion 107 forms the outermost peripheral portion of the coil element 10i.
• Each of the turn portions 101 to 107 of the coil element 10i extends on a virtual plane perpendicular to the axial direction.
• the first to seventh turn portions 101 to 107 are connected in this order, so that the coil element 10i forms a spiral shape around the central axis C.
• the coil element 10i has a dodecagonal shape as a whole.
• the coil element 10i (conductor 10E) is wound so that each of the turn portions 101 to 107 generally forms a dodecagon.
• Each turn portion 101 to 107 of the coil element 10i includes a plurality of straight portions 11 to 14 arranged around the central axis C. Straight portions 11 to 14 adjacent in the circumferential direction of a circle centered on the central axis C are connected to each other.
• the first to seventh turn parts 101 to 107 include a first straight part 11 and a third straight part 13 extending in the first direction D1, and a second straight part 12 and a third straight part 13 extending in the second direction D2. 4 straight portions 14.
• the first direction D1 and the second direction D2 are non-parallel to each other.
• the first direction D1 and the second direction D2 are orthogonal to each other.
• the first straight part 11 and the third straight part 13 are arranged so that the central axis C passes therebetween.
• the second straight portion 12 and the fourth straight portion 14 are arranged such that the central axis C passes therebetween.
• the first to seventh turn portions 101 to 107 include first to fourth straight portions 11 to 14, first intermediate straight portions 161 to 164, and second intermediate straight portions 171. ⁇ 174 included.
• the first A intermediate straight portion 161 and the first C intermediate straight portion 163 extend in the third direction D3.
• the third direction D3 is non-parallel to any of the first and second directions D1 and D2.
• the first B intermediate straight portion 162 and the first D intermediate straight portion 164 extend in the fourth direction D4.
• the fourth direction D4 is non-parallel to any of the first to third directions D1 to D3.
• the second A intermediate straight portion 171 and the second C intermediate straight portion 173 extend in the fifth direction D5.
• the fifth direction D5 is non-parallel to any of the first to fourth directions D1 to D4.
• the second B intermediate straight portion 172 and the second D intermediate straight portion 174 extend in the sixth direction D6.
• the sixth direction D6 is non-parallel to any of the first to fifth directions D1 to D5.
• adjacent ends of the first straight part 11 and the second straight part 12 are connected via the first A intermediate straight part 161.
• adjacent ends of the first A intermediate straight portion 161 and the second straight portion 12 are connected via the second A intermediate straight portion 171.
• adjacent ends of the second straight part 12 and the third straight part 13 are connected via the 1B intermediate straight part 162.
• adjacent ends of the first B intermediate straight portion 162 and the third straight portion 13 are connected via the second B intermediate straight portion 172.
• adjacent ends of the third straight part 13 and the fourth straight part 14 are connected via a first C intermediate straight part 163.
• adjacent ends of the first C intermediate straight portion 163 and the fourth straight portion 14 are connected via the second C intermediate straight portion 173.
• the adjacent ends of the fourth straight part 14 of the first turn part 101 and the first straight part 11 of the second turn part 102 are connected via the first D intermediate straight part 164 and the second D intermediate straight part 174.
• the adjacent ends of the fourth straight part 14 of the second turn part 102 and the first straight part 11 of the third turn part 103 are connected via the first D intermediate straight part 164 and the second D intermediate straight part 174. ing.
• the first A intermediate straight portions 161 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a first A intermediate straight portion group 161G. Further, the first B intermediate straight portions 162 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a first B intermediate straight portion group 162G. Further, the 1C intermediate straight portions 163 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a 1C intermediate straight portion group 163G. Further, the first D intermediate straight portions 164 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a first D straight portion group 164G.
• the radially adjacent first intermediate straight portions 161, 161; 162, 162; 163, 163; 164, 164 are spaced apart from each other in the radial direction.
• the first A to first D intermediate straight line portion groups 161G to 164G are parallel straight line groups consisting of a plurality of first A to first D intermediate straight portions 161 to 164, respectively.
• the second A intermediate straight portions 171 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a second A intermediate straight portion group 171G.
• the second B intermediate straight portions 172 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a second B intermediate straight portion group 172G.
• the second C intermediate straight portions 173 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a second C intermediate straight portion group 173G.
• the second D intermediate straight portions 174 of the plurality of turn portions 101 to 107 are arranged in the radial direction to form a second D straight portion group 174G.
• the radially adjacent second intermediate straight portions 171, 171; 172, 172; 173, 173; 174, 174 are spaced apart from each other in the radial direction.
• the 2A to 2D intermediate straight portion groups 171G to 174G are parallel straight line groups each consisting of a plurality of 2A to 2D intermediate straight portions 171 to 174.
• the coil element 10i in FIGS. 34 and 35 has a dodecagonal shape as a whole.
• the coil element 10i (conductor 10E) is wound so that each of the turn portions 101 to 107 generally forms a dodecagon.
• the coil element 10i includes 12 linear portion groups 11 to 14, 161 to 164, and 171 to 174 extending along the 12 sides of the dodecagon.
• the angle formed by the first straight portion 11 and the first A intermediate straight portion 161 is 140° to 160° when viewed in the axial direction.
• the angle formed by the first A intermediate straight portion 161 and the second A intermediate straight portion 171 is 140° to 160°.
• the angle formed by the second A intermediate straight portion 171 and the second straight portion 12 is 140° to 160°.
• the angle formed by the second straight portion 12 and the first B intermediate straight portion 162 is 140° to 160°.
• the angle formed by the first B intermediate straight portion 162 and the second B intermediate straight portion 172 is 140° to 160°.
• the angle formed by the second B intermediate straight portion 172 and the third straight portion 13 is 140° to 160°.
• the angle formed by the third straight portion 13 and the first C intermediate straight portion 163 is 140° to 160°.
• the angle formed by the first C intermediate straight portion 163 and the second C intermediate straight portion 173 is 140° to 160°. Furthermore, when viewed in the axial direction, the angle formed by the second C intermediate straight portion 173 and the fourth straight portion 14 is 140° to 160°. Further, when viewed in the axial direction, the angle formed by the fourth straight portion 14 and the first D intermediate straight portion 164 is 140° to 160°. Furthermore, when viewed in the axial direction, the angle formed by the first D intermediate straight portion 164 and the second D intermediate straight portion 174 is 140° to 160°. Furthermore, when viewed in the axial direction, the angle formed by the second D intermediate straight portion 174 and the first straight portion 11 is 140° to 160°.
• the angle between the first straight portion 11 and the first A intermediate straight portion 161 is 150° when viewed in the axial direction. Further, when viewed in the axial direction, the angle formed by the first A intermediate straight line portion 161 and the second A intermediate straight line portion 171 is 150°. Furthermore, when viewed in the axial direction, the angle between the second A intermediate straight portion 171 and the second straight portion 12 is 150°. Further, when viewed in the axial direction, the angle between the second straight portion 12 and the first B intermediate straight portion 162 is 150°. Further, when viewed in the axial direction, the angle formed by the first B intermediate straight portion 162 and the second B intermediate straight portion 172 is 150°.
• the angle between the second B intermediate straight portion 172 and the third straight portion 13 is 150°. Further, when viewed in the axial direction, the angle formed by the third straight portion 13 and the first C intermediate straight portion 163 is 150°. Further, when viewed in the axial direction, the angle formed by the first C intermediate straight portion 163 and the second C intermediate straight portion 173 is 150°. Further, when viewed in the axial direction, the angle between the second C intermediate straight portion 173 and the fourth straight portion 14 is 150°. Further, when viewed in the axial direction, the angle formed by the fourth straight portion 14 and the first D intermediate straight portion 164 is 150°.
• the angle formed by the first D intermediate straight portion 164 and the second D intermediate straight portion 174 is 150°. Further, when viewed in the axial direction, the angle between the second D intermediate straight portion 174 and the first straight portion 11 is 150°.
• the coil element 10i may have a regular dodecagonal shape as a whole.
• the coil element 10i (conductor 10E) may be wound so that each of the turn portions 101 to 107 generally forms a regular dodecagon.
• the coil element 10i may include 12 linear portion groups 11 to 14, 161 to 164, and 171 to 174 extending along 12 sides of a regular dodecagon. In this case, the performance of the coil 10 can be improved.
• the coil 10 includes coil elements 10j and 10jj as shown in FIG. It is sufficient to include 11 straight line portion groups 11 to 13, 161 to 164, and 171 to 174 extending along 11 of the 12 sides of the diagonal.
• the coil 10 includes coil elements 10j, 10jj, and the coil elements 10j, 10jj have a regular dodecagonal shape as a whole, each coil element 10j, 10jj has 12 squares of a regular dodecagon. It is sufficient to include 11 straight line portion groups 11 to 13, 161 to 164, and 171 to 174 extending along 11 of the sides.
• first intermediate straight portions 161 to 164 may be connected by curved portions.
• the first shield member 30 includes 18 shield pieces 30P. Each shield piece 30P has a rectangular shape. Twenty-four gaps 50 are formed in the first shield member 30 . 20 of the 24 gaps cross at least part of the linear section groups 11G to 14G, the first intermediate linear section groups 161G to 164G, and/or the second intermediate linear section groups 171G to 174G when viewed in the axial direction.
• the first shield member 30 includes 24 shield pieces 30P. Twenty-eight gaps 50 are formed in the first shield member 30 . Sixteen of the twenty-eight gaps extend radially from the central axis C. Four of the sixteen gaps cross at least a portion of the second intermediate straight portion group 171G to 174G when viewed in the axial direction. In the example shown in FIG. 35, the four gaps 50 cross the second intermediate straight portion group 171G to 174G when viewed in the axial direction. In other words, when viewed in the axial direction, the four gaps 50 extend from radially inward to radially outward of the second intermediate straight portion groups 171G to 174G.
• the shield piece 30P By arranging the shield piece 30P so that one of the four gaps 50 crosses the second A intermediate linear portion 171, the lines of magnetic force formed around each second A intermediate linear portion 171 are It is suppressed from reaching the second shield member 40 through the second shield member 40 . Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the second A intermediate straight portion 171. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the existence of the gap 50, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the gap 50. means.
• the angle formed by the gap 50 that crosses the second A intermediate straight portion 171 and the second A intermediate straight portion 171 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the gap 50 may be perpendicular to the second A intermediate straight portion 171 when viewed in the axial direction.
• the shield piece 30P by arranging the shield piece 30P so that one of the four gaps 50 crosses the second B intermediate straight portion 172, the lines of magnetic force formed around each second B intermediate straight portion 172 are Reaching the second shield member 40 through the gap 50 is suppressed. Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the second B intermediate straight portion 172. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the existence of the gap 50, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the gap 50. means.
• the angle formed by the gap 50 that crosses the second B intermediate straight portion 172 and the second B intermediate straight portion 172 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the gap 50 may be perpendicular to the second B intermediate straight portion 172 when viewed in the axial direction.
• the shield piece 30P by arranging the shield piece 30P so that one of the four gaps 50 crosses the second C intermediate straight portion 173, the lines of magnetic force formed around each second C intermediate straight portion 173 are Reaching the second shield member 40 through the gap 50 is suppressed. Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the second C intermediate straight portion 173. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the existence of the gap 50, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the gap 50. means.
• the angle formed by the gap 50 that crosses the second C intermediate linear portion 173 and the second C intermediate linear portion 173 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the gap 50 may be perpendicular to the second C intermediate straight portion 173 when viewed in the axial direction.
• the shield piece 30P by arranging the shield piece 30P so that one of the four gaps 50 crosses the second D intermediate straight portion 174, the lines of magnetic force formed around each second D intermediate straight portion 174 are Reaching the second shield member 40 through the gap 50 is suppressed. Thereby, it is possible to suppress generation of eddy current in the second shield member 40 due to lines of magnetic force formed around the second D intermediate straight portion 174. This means that it is possible to suppress an increase in the loss (heat generation) of the coil unit 5 due to the existence of the gap 50, and it is possible to suppress a decrease in the performance of the coil unit 5 due to the presence of the gap 50. means.
• the angle formed by the gap 50 that crosses the second D intermediate straight portion 174 and the second D intermediate straight portion 174 may be, for example, 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the gap 50 may be perpendicular to the second D intermediate straight portion 174 when viewed in the axial direction.
• eight of the sixteen gaps 50 cross at least a portion of any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction.
• the eight gaps 50 cross any one of the first to fourth linear portion groups 11G to 14G.
• the eight gaps 50 extend from radially inward to radially outward of any of the first to fourth linear portion groups 11G to 14G.
• the angle formed by the gap 50 that crosses the first straight portion 11 and the first straight portion 11 is 80° to 100°. More specifically, the gap 50 is perpendicular to the first straight portion 11 . Furthermore, when viewed in the axial direction, the angle formed by the gap 50 that crosses the second straight portion 12 and the second straight portion 12 is 80° to 100°. More specifically, the gap 50 is perpendicular to the second straight portion 12 . Further, when viewed in the axial direction, the angle formed by the gap 50 that crosses the third straight portion 13 and the third straight portion 13 is 80° to 100°. More specifically, the gap 50 is orthogonal to the third straight portion 13. Further, when viewed in the axial direction, the angle formed by the gap 50 that crosses the fourth straight portion 14 and the fourth straight portion 14 is 80° to 100°. More specifically, the gap 50 is perpendicular to the fourth straight portion 14 .
• the four of the sixteen gaps 50 cross at least a portion of any one of the 1A to 1D intermediate linear portion groups 161G to 164G.
• the four gaps 50 cross any one of the 1A to 1D intermediate straight portion groups 161G to 164G.
• the four gaps 50 extend from radially inward to radially outward of any of the 1A to 1D intermediate straight portion groups 161G to 164G. .
• the angle formed by the gap 50 that crosses the first A intermediate straight portion 161 and the first A intermediate straight portion 161 is 80° to 100°. More specifically, the gap 50 is orthogonal to the first A intermediate straight portion 161. Further, when viewed in the axial direction, the angle formed by the gap 50 that crosses the first B intermediate straight portion 162 and the first B intermediate straight portion 162 is 80° to 100°. More specifically, the gap 50 is perpendicular to the first B intermediate straight portion 162. Further, when viewed in the axial direction, the angle formed by the gap 50 that crosses the first C intermediate straight line portion 163 and the first C intermediate straight line portion 163 is 80° to 100°. More specifically, the gap 50 is perpendicular to the first C intermediate straight line portion 163.
• the angle formed by the gap 50 that crosses the first D intermediate straight portion 164 and the first D intermediate straight portion 164 is 80° to 100°. More specifically, the gap 50 is orthogonal to the first D intermediate straight portion 164.
• the layout of the plurality of shield pieces 30P (or the first shield
• the manner in which the member 30 is divided is not limited to the layout (or manner in which it is divided) shown in FIG. 35. Even when the coil elements 10i; 10j, 10jj have a dodecagonal shape as a whole, the angle formed by the gap 50 that crosses the second intermediate linear portion group 171G to 174G and the second intermediate linear portions 171 to 174 is 80° to As the layout of the plurality of shield pieces 30P (or the manner of dividing the first shield member 30) such that the angle is 100°, various layouts (or various manners of division) can be adopted.
• the first connection terminal 46 when the first connection terminal 46 is connected to the inner end 10e1 of the coil element 10i, the first connection terminal 46 extends within the gap 50 when viewed in the axial direction; Not limited. As shown in FIGS. 34 and 35, the first connection terminal 46 may extend within a notch N formed in the shield piece 30P when viewed in the axial direction. Also in this case, as shown in FIG. 7, the first connection terminal 46 may extend from the inside of the coil 10 to the outside at a height position overlapping the small shield piece 30P in a side view of the coil unit 5.
• the angle between the first connection terminal 46 and the straight portion 11 that the first connection terminal 46 crosses when viewed in the axial direction is as follows. For example, it may be 80° to 100°. Furthermore, as shown in FIGS. 36 and 37, the first connection terminal 46 may be perpendicular to the straight portion 11. In this case, lines of magnetic force formed around the straight portion 11 are prevented from reaching the second shield member 40 through the notch N.
• FIGS. 38 and 39 a modification shown in FIGS. 38 and 39 will be described.
• the inner end region including the inner end 10e1 of the coil element 10i in the example shown in FIGS. 24 and 38,
• the overlap length between the shield piece 31 closest to the inner end 10e1 of the shield pieces 30P on which the first linear portion 11) of the first turn portion 101 overlaps and the inner end region is long.
• the loss (heat generation) of the first shield member 30 in FIG. ) can be effectively made smaller.
• the loss of the first shield member 30 here includes a loss caused by the magnetic flux of the first shield member 30 (so-called "iron loss").
• the overlapping length of the shield piece closest to the inner end 10e1 among the shield pieces 3130P that overlap with the first linear part 11) of the first turn part 101 and the above-mentioned inner end region is long.
• the loss (heat generation) of the first shield member 30 in FIG. ) can be effectively made smaller.
• the first connection terminal 46 connected to the inner end 10e1 of the coil element 10i crosses one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction.
• the coil 10 extends outward in the radial direction of the coil 10, the present invention is not limited thereto.
• the first connection terminal 46 extends radially outward of the coil 10, crossing one of the first to first D intermediate curved portion groups 151G to 154G when viewed in the axial direction. You can leave it out. In this case, it is easy to bring the first connection terminal 46 close to the second connection terminal 47.
• the angle formed by the first connection terminal 46 and the tangent TL4 of the first intermediate curved portion group 154G crossed by the first connection terminal 46 is, for example, 80° to 100°. It's good to be there.
• the first connection terminal 46 when viewed in the axial direction, may be orthogonal to the tangent TL4 of the first intermediate curved portion group 154G. In this case, lines of magnetic force formed around each of the turn portions 101 to 108 of the coil 10 are prevented from reaching the second shield member 40 through the gap 50 or notch N through which the first connection terminal 46 passes.
• the first connection terminal 46 crosses one of the intermediate straight portion groups 161G to 164G or 171G to 174G and extends outward in the radial direction of the coil 10. It may be extended. In this case, it is easy to bring the first connection terminal 46 close to the second connection terminal 47. In other words, it is easy to make the distance between the first point IP1 and the second point IP2 100 mm or less, or 50 mm or less. Therefore, it is easy to make the angle ⁇ between the first virtual line IL1 and the second virtual line IL2 90° or less, 60° or less, 45° or less, or 30° or less.
• the angle formed by the first connecting terminal 46 and the intermediate straight portion group 164G crossed by the first connecting terminal 46 may be, for example, 80° to 100°.
• the first connection terminal 46 may be perpendicular to the intermediate straight portion group 164G when viewed in the axial direction. In this case, lines of magnetic force formed around each of the turn portions 101 to 108 of the coil 10 are prevented from reaching the second shield member 40 through the gap 50 or notch N through which the first connection terminal 46 passes.
• the pitches of the plurality of turn portions 101 to 108 are equal. Therefore, the distance between the inner end 10e1 of the coil element 10i and the first straight part 11 of the second turn part 102 is the same as the distance between the first straight part 11 of the second turn part 102 and the first straight part of the third turn part 103. It is equal to the distance from 11. On the other hand, in the example shown in FIG. It is larger than the distance between the three-turn section 103 and the first straight section 11 . More specifically, the inner end region of the coil element 10i including the inner end portion 10e1 (in the example shown in FIG.
• the distance to the first straight section 11 is greater than the distance between the first straight section 11 of the second turn section 102 and the first straight section 11 of the third turn section 103 .
• the inner end 10e1 is separated from the second turn 102, resulting in loss (heat generation) of the first shield member 30. ) (losses including so-called iron losses) can be suppressed.
• the shield piece 30P in the example shown in FIG. 42
• the inner end region in the example shown in FIG.
• the loss (heat generation) of the shield pieces 31) can be effectively suppressed.
• the coil unit 5 shown in FIG. 43 differs from the coil unit 5 shown in FIG. 26 in that the first shield member 30 is not divided into a plurality of shield pieces 30P.
• the other configurations are substantially the same as the coil unit 5 shown in FIG. 26.
• the same parts as those in the coil unit 5 shown in FIG. 26 are given the same reference numerals, and detailed explanations are omitted.
• the coil element 10i has an octagonal shape as a whole, similar to the example shown in FIG. More specifically, the coil element 10i includes eight linear part groups (straight part groups 11G to 14G and intermediate straight part groups 161G to 164G) extending along the eight sides of the octagon.
• the performance of the coil unit 5 can be improved compared to the case where the coil element 10i has the shape shown in FIGS. 2 to 5B.
• the performance of the coil unit 5 including the coil element 10i having an octagonal shape as a whole is higher than that of the coil unit 5 including the coil element 10i having a rectangular shape as a whole and including the first intermediate curved portion groups 151G to 154G.
• the angle formed by the adjacent straight line portion groups 11G, 161G; 161G, 12G; 12G, 162G; 162G, 13G; 13G, 163G; 163G, 14G; It may be.
• the coil element 10i may have a regular octagonal shape as a whole. According to the knowledge obtained by the inventor of the present invention, the coil 10 having a regular octagonal shape can effectively improve the performance of the coil unit 5.
• the first shield member 30 is not divided into a plurality of shield pieces 30P. Therefore, the gap 50 is not formed in the first shield member 30.
• the first shield member 30 may be divided into a plurality of shield pieces 30P, as shown in FIGS. 26 to 29. Even when the first shield member 30 is divided into a plurality of shield pieces 30P, if the conditions other than the shape of the coil element 10i are the same, the performance of the coil unit 5 including the octagonal coil element 10i as a whole is as follows. The performance is higher than that of the coil unit 5 including the coil element 10i having the shape shown in FIGS. 2 to 5B. For example, the performance of the coil unit 5 shown in FIG. 28 is higher than the performance of the coil unit 5 shown in FIG. 22. Further, the performance of the coil unit 5 shown in FIG. 29 is higher than the performance of the coil unit 5 shown in FIG. 24.
• the coil elements 10j, 10jj are octagonal as a whole, similar to the examples shown in FIGS. 30 to 33. More specifically, the coil elements 10j, 10jj have seven straight line portion groups (straight line portion groups 11G to 13G and intermediate straight portion groups 161G to 164G) extending along seven of the eight sides of the octagon. include. Thereby, the performance of the coil unit 5 can be improved compared to the case where the coil elements 10j, 10jj have the shapes shown in FIGS. 17 to 21.
• the performance of the coil unit 5 including the coil elements 10j and 10jj that are octagonal as a whole is as compared to the coil unit 5 that includes the coil elements 10j and 10jj that are rectangular as a whole and include the first intermediate curved portions 151G to 154G. expensive.
• the angle formed by the adjacent straight line portion groups 11G, 161G; 161G, 12G; 12G, 162G; 162G, 13G; 13G, 163G; 164G, 11G may be 125° to 145°.
• the angle formed by the adjacent straight line portion groups 11G, 161G; 161G, 12G; 12G, 162G; 162G, 13G; 13G, 163G; 164G, 11G may be 135°.
• the coil elements 10j, 10jj may have a regular octagonal shape as a whole.
• the coil elements 10j, 10jj include seven straight line portion groups (straight line portion groups 11G to 13G and first intermediate straight line portion groups 161G to 164G) extending along seven of the eight sides of the regular octagon. ) may also be included. According to the knowledge obtained by the inventor of the present invention, the coil 10 having a regular octagonal shape can effectively improve the performance of the coil unit 5.
• the first shield member 30 is not divided into a plurality of shield pieces 30P. Therefore, the gap 50 is not formed in the first shield member 30.
• the first shield member 30 may be divided into a plurality of shield pieces 30P, as shown in FIGS. 30 to 33.
• the coil unit 5 including the octagonal coil elements 10j and 10jj as a whole The performance is higher than that of the coil unit 5 including the coil elements 10j, 10jj having the shapes shown in FIGS. 17 to 19.
• the performance of the coil unit 5 shown in FIG. 31 is higher than the performance of the coil unit 5 shown in FIG. 21.
• the coil element 10i is dodecagonal as a whole, similar to the examples shown in FIGS. 34 and 35. More specifically, the coil element 10i includes 11 straight line portion groups (straight line portion groups 11G to 13G, first intermediate straight line portion groups 161G to 164G) extending along 11 of the 12 sides of the dodecagon. and second intermediate straight line portion groups 171G to 174G). In the example shown in FIG. 45, the coil element 10i includes linear portion groups (straight portion groups 11G to 14G, first intermediate straight portion groups 161G to 164G, and second intermediate straight portion groups) extending along 12 sides of a dodecagon. 171G to 174G).
• the performance of the coil unit 5 can be improved compared to the case where the coil element 10i has the shape shown in FIGS. 2 to 5B.
• the performance of the coil unit 5 including the overall dodecagonal coil element 10i is higher than that of the coil unit 5 including the overall rectangular coil element 10i including the first intermediate curved portions 151G to 154G.
• the angle formed by 11G may be 125° to 145°.
• the angle formed by the adjacent linear portion groups 173G, 14G; 14G, 164G may also be 125° to 145°.
• the angle formed by 11G may be 135°.
• the angle formed by the adjacent straight line portion groups 173G, 14G; 14G, 164G may also be 135°.
• the coil element 10i may have a regular dodecagonal shape as a whole. More specifically, the coil element 10i includes 11 straight line portion groups (straight line portion groups 11G to 13G, first intermediate straight line portion groups 161G to 161G) extending along 11 of the 12 sides of a regular dodecagon. 164G and second intermediate straight line portion groups 171G to 174G). According to the knowledge obtained by the inventor of the present invention, the performance of the coil unit 5 can be effectively improved by having the coil 10 in the shape of a regular dodecagon.
• the first shield member 30 is not divided into a plurality of shield pieces 30P. Therefore, the gap 50 is not formed in the first shield member 30.
• the first shield member 30 may be divided into a plurality of shield pieces 30P, as shown in FIGS. 34 and 35. Even when the first shield member 30 is divided into a plurality of shield pieces 30P, if the conditions other than the shape of the coil element 10i are the same, the performance of the coil unit 5 including the dodecagonal coil element 10i as a whole is higher than the performance of the coil unit 5 including the coil element 10i having the shape shown in FIGS. 2 to 5B.
• the coil element 10i includes 12 straight line part groups (straight line part groups 11G to 14G, first intermediate straight part groups 161G to 164G, and second intermediate straight part groups 161G to 164G, and (intermediate straight portion groups 171G to 174G).
• the coil 10 includes coil elements 10j, 10jj as shown in FIG. It is sufficient to include 11 straight line portion groups 11 to 13, 161 to 164, and 171 to 174 extending along 11 of the 12 sides of the rectangle.
• each coil element 10j, 10jj has 12 squares of a regular dodecagon. It is sufficient to include 11 straight line portion groups 11 to 13, 161 to 164, and 171 to 174 extending along 11 of the sides.
• the coil unit 5 of Example 1-1 is a coil consisting of a spirally formed coil 10, a magnetic resin layer 20, a first shield member 30, and a second shield member 40.
• Unit 5 has been prepared.
• Coil 10 was formed similarly to coil 10 shown in FIGS. 2-5B.
• the coil 10 was made of copper, had a line width of 6 mm, and a thickness of 0.5 mm. Further, the distance between adjacent turn portions 101, 102;...;107, 108 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the magnetic resin layer 20 was formed by curing a two-part curable epoxy resin mixed with magnetic powder.
• the coil 10 was housed in the recess 25 of the magnetic resin layer 20, as shown in FIG. 4, and the second main surface 10b of the coil 10 was in close contact with the magnetic resin layer 20.
• the first shield member 30 was formed by being divided into four shield pieces 31 to 34. Each shield piece 31-34 was a ferrite plate. The dimensions of the first shield member 30 in the first direction D1 and the second direction D2 were 300 mm and 300 mm, respectively. Further, the distance between the magnetic resin layer 20 and the first shield member 30 was 1 mm. The width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 31 was 5 mm.
• first gap 51 One of the four gaps 50 (first gap 51) formed between adjacent shield pieces 31, 32; 32, 33; 33, 34; It crossed the first straight section 11 of the 8-turn sections 102-108.
• This gap 50 was perpendicular to the first straight portions 11 of the second to eighth turn portions 102 to 108 when viewed in the axial direction.
• the other three gaps 50 (second to fourth gaps 52 to 54) cross the second to fourth straight portions 12 to 14 of the first to eighth turn portions 101 to 108, respectively, when viewed in the axial direction.
• These three gaps 50 were perpendicular to the second to fourth straight portions 12 to 14 of the first to eighth turn portions 101 to 108, respectively, when viewed in the axial direction.
• the four gaps 50 were formed so that their extension lines passed through the central axis C.
• the second shield member 40 was made of aluminum.
• the dimensions of the second shield member 40 in the first direction D1 and the second direction D2 were 320 mm and 320 mm, respectively. Further, the distance between the first shield member 30 and the second shield member 40 was 1 mm.
• Example 1-2 The coil unit 5 of Example 1-2 is similar to that of Example 1-1, except that the first shield member 30 is divided into six shield pieces 31 to 36 as in the example shown in FIG. was created.
• Each shield piece 31-36 was a ferrite plate.
• the width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 was 5 mm.
• Two of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crossed the first straight portion 11 of the second to eighth turn portions 102 to 108 or the third straight portion 13 of the first to eighth turn portions 101 to 108.
• gaps 50 are perpendicular to the first straight portions 11 of the second to eighth turn portions 102 to 108 or the third straight portions 13 of the first to eighth turn portions 101 to 108 when viewed in the axial direction. Ta. Further, these two gaps 50 were formed so that their extension lines passed through the central axis C. Furthermore, one of the seven gaps 50 extends within the area surrounded by the first turn portion 101 along the second direction D2. This gap 50 overlapped with the central axis C when viewed in the axial direction. Further, the remaining four gaps 50 crossed the second straight portion 12 or the fourth straight portion 14 of the first to eighth turn portions 101 to 108 when viewed in the axial direction.
• These four gaps 50 were perpendicular to the second linear portion 12 or the fourth linear portion 14 of the first to eighth turn portions 101 to 108 when viewed in the axial direction. Further, two of these four gaps 50 extend between the first straight portion group 11G and the central axis C when viewed in the axial direction. Further, the other two of these four gaps 50 extend between the third straight portion group 13G and the central axis C when viewed in the axial direction.
• Example 1-3 The coil unit 5 of Example 1-3 was produced in the same manner as in Example 1-1, except that the first shield member 30 was divided into six shield pieces 31 to 36 as shown in FIG. did. Each shield piece 31-36 was a ferrite plate. The width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 was 5 mm. Two of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crossed the first straight portion 11 of the second to eighth turn portions 102 to 108 or the third straight portion 13 of the first to eighth turn portions 101 to 108.
• gaps 50 are perpendicular to the first straight portions 11 of the second to eighth turn portions 102 to 108 or the third straight portions 13 of the first to eighth turn portions 101 to 108 when viewed in the axial direction. Ta. Further, these two gaps 50 were formed so that their extension lines passed through the central axis C. Furthermore, one of the seven gaps 50 extends within the area surrounded by the first turn portion 101 along the second direction D2. This gap 50 overlapped with the central axis C when viewed in the axial direction. Moreover, three of the remaining four gaps 50 extended along the second direction D2 when viewed in the axial direction, and overlapped with the first straight part 11 or the third straight part 13 of the first turn part 101. . Further, the other one of the four gaps 50 extends on an extension line of the first straight portion 11 when viewed in the axial direction.
• Example 1-4 The coil unit 5 of Example 1-4 was produced in the same manner as in Example 1-1, except that the first shield member 30 was divided into six shield pieces 31 to 36 as shown in FIG. did. Each shield piece 31-36 was a ferrite plate. The width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 was 5 mm.
• Three of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crossed a part of the first straight part 11 of the second to eighth turn parts 102 to 108 and/or a part of the third straight part 13 of the first to eighth turn parts 101 to 108. When viewed in the axial direction, these three gaps 50 are a part of the first straight portion 11 of the second to eighth turn portions 102 to 108 and/or a third straight portion of the first to eighth turn portions 101 to 108. It was perpendicular to a part of 13. Further, one of these three gaps 50 overlapped with the central axis C when viewed in the axial direction.
• the other two of these three gaps 50 were formed so that their extension lines passed through the central axis C. Furthermore, two of the remaining four gaps 50 extend along the first straight portion 11 within the first straight portion group 11G when viewed in the axial direction. More specifically, these gaps 50 extended between the first straight portions 11 of the second turn portion 102 and the third turn portion 103. Further, the other two of the four gaps 50 extend along the third straight portion 13 within the third straight portion group 13G when viewed in the axial direction. More specifically, these gaps 50 extended between the third straight portions 13 of the second turn portion 102 and the third turn portion 103.
• Example 1-5 The coil unit 5 of Example 1-5 was produced in the same manner as in Example 1-1, except that the first shield member 30 was divided into six shield pieces 31 to 36 as shown in FIG. did. Each shield piece 31-36 was a ferrite plate. The width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 was 5 mm.
• Three of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crossed a part of the first straight part 11 of the second to eighth turn parts 102 to 108 and/or a part of the third straight part 13 of the first to eighth turn parts 101 to 108. When viewed in the axial direction, these three gaps 50 are a part of the first straight portion 11 of the second to eighth turn portions 102 to 108 and/or a third straight portion of the first to eighth turn portions 101 to 108. It was perpendicular to a part of 13. Further, one of these three gaps 50 overlapped with the central axis C when viewed in the axial direction.
• the other two of these three gaps 50 were formed so that their extension lines passed through the central axis C. Furthermore, two of the remaining four gaps 50 extend along the first straight portion 11 within the first straight portion group 11G when viewed in the axial direction. More specifically, these gaps 50 extended between the first straight portions 11 of the third turn portion 103 and the fourth turn portion 104. Further, the other two of the four gaps 50 extend along the third straight portion 13 within the third straight portion group 13G when viewed in the axial direction. More specifically, these gaps 50 extended between the third straight portions 13 of the third turn portion 103 and the fourth turn portion 104.
• Example 1-6 The coil unit 5 of Example 1-6 was produced in the same manner as in Example 1-1, except that the first shield member 30 was divided into six shield pieces 31 to 36 as shown in FIG. did. Each shield piece 31-36 was a ferrite plate. The width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 was 5 mm.
• Three of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crossed a part of the first straight part 11 of the second to eighth turn parts 102 to 108 and/or a part of the third straight part 13 of the first to eighth turn parts 101 to 108. When viewed in the axial direction, these three gaps 50 are a part of the first straight portion 11 of the second to eighth turn portions 102 to 108 and/or a third straight portion of the first to eighth turn portions 101 to 108. It was perpendicular to a part of 13. Further, one of these three gaps 50 overlapped with the central axis C when viewed in the axial direction.
• the other two of these three gaps 50 were formed so that their extension lines passed through the central axis C. Furthermore, two of the remaining four gaps 50 extend along the first straight portion 11 within the first straight portion group 11G when viewed in the axial direction. More specifically, these gaps 50 extended between the first straight portions 11 of the sixth turn portion 106 and the seventh turn portion 107. Further, the other two of the four gaps 50 extend along the third straight portion 13 within the third straight portion group 13G when viewed in the axial direction. More specifically, these gaps 50 extended between the third straight portions 13 of the sixth turn portion 106 and the seventh turn portion 107.
• Example 1-7 The coil unit 5 of Example 1-7 was manufactured in the same manner as in Example 1-1, except that the first shield member 30 was formed by dividing it into six shield pieces 31 to 36 as shown in FIG. did. Each shield piece 31-36 was a ferrite plate. The width of the gap 50 between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 was 5 mm.
• Three of the seven gaps 50 formed between the adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 31; 32, 35 are axially As seen, it crossed a part of the first straight part 11 of the second to eighth turn parts 102 to 108 and/or a part of the third straight part 13 of the first to eighth turn parts 101 to 108. When viewed in the axial direction, these three gaps 50 are a part of the first straight portion 11 of the second to eighth turn portions 102 to 108 and/or a third straight portion of the first to eighth turn portions 101 to 108. It was perpendicular to a part of 13. Further, one of these three gaps 50 overlapped with the central axis C when viewed in the axial direction.
• the other two of these three gaps 50 were formed so that their extension lines passed through the central axis C. Furthermore, two of the remaining four gaps 50 extend along the first straight portion 11 within the first straight portion group 11G when viewed in the axial direction. More specifically, these gaps 50 overlapped with the first straight portion 11 of the eighth turn portion 108 . Further, the other two of the four gaps 50 extend along the third straight portion 13 within the third straight portion group 13G when viewed in the axial direction. More specifically, these gaps 50 overlapped with the third straight portion 13 of the eighth turn portion 108.
• FIG. 46 shows the Q value and loss of the coil units 5 of Examples 1-1 to 1-7.
• the number of gaps 50 in the first shield members 30 in the coil unit 5 of Example 1-2 is Although the number of gaps 50 was large, there was no significant difference in Q value and loss between the coil units 5 of Example 1-1 and Example 1-2. From this result, when the gap 50 of the first shield member 30 is provided so as to cross the group of linear parts of the coil element 10i when viewed in the axial direction, the performance of the coil 10 is significantly impaired due to the presence of the gap 50. It can be understood that the loss of the coil unit 5 does not increase significantly.
• the coil was formed such that all the gaps 50 of the first shield member 30 cross any of the linear portion groups 11G to 14G when viewed in the axial direction.
• the Q value of the unit (the coil unit 5 of Examples 1-1 and 1-2) is such that a part of the gap 50 of the first shield member 30 extends within any of the straight part groups 11G to 14G.
• the Q value tends to be higher. be understood.
• the gap 50 formed in the first shield member 30 extends within any of the linear portion groups 11G to 14G when viewed in the axial direction. It can be understood that the Q value of the coil unit 5 decreases as the gap 50 approaches the center in the radial direction of the linear portion groups 11G to 14G.
• the gap 50 of the first shield member 30 is between the first turn portion 101 forming the innermost peripheral portion of the coil 10 and the center axis C.
• the Q value of the coil unit (coil unit 5 of Example 1-2) formed so as to extend between the first turn portion where the gap 50 of the first shield member 30 forms the innermost peripheral portion of the coil 10 is It is understood that the Q value tends to be higher than that of the coil units formed to extend outside the coil unit 101 (the coil units 5 of Examples 1-3 to 1-7).
• Example 1- The Q value of the coil unit 5) of No. 1 is determined by the coil unit (coil unit 5 of Examples 1-2 to 1-7) formed such that the extension line of the gap 50 of the first shield member 30 deviates from the central axis C. It is understood that the Q value tends to be higher than that of Q value.
• the coil unit 5 of Example 2-1 includes a coil 10 including coil elements 10j and 10jj formed in a spiral shape, a magnetic resin layer 20, a first shield member 30, and a first shield member 30.
• a coil unit 5 consisting of two shield members 40 was prepared.
• the coil 10 was formed similarly to the coil 10 shown in FIGS. 17-19.
• the coil elements 10j, 10jj were made of copper, had a line width of 6 mm, and a thickness of 0.5 mm. Further, in each coil element 10j, 10jj, the distance between adjacent turn portions 101, 102;...;104, 105 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the magnetic resin layer 20 was formed by curing a two-part curable epoxy resin mixed with magnetic powder.
• the coil 10 was embedded in the magnetic resin layer 20 as shown in FIG. 18, and the second main surface 10b of the coil 10 was in close contact with the magnetic resin layer 20.
• the first shield member 30 was formed by being divided into nine shield pieces 31 to 39. Each shield piece 31-39 was a ferrite plate.
• the dimensions of the first shield member 30 in the first direction D1 and the second direction D2 were 300 mm and 300 mm, respectively. Further, the distance between the magnetic resin layer 20 and the first shield member 30 was 0 mm.
• Adjacent shield pieces Adjacent shield pieces Adjacent shield pieces 31, 32; 32, 33; 33, 34; 34, 35; 35, 36; 36, 37; 37, 38; 38, 31; 32, 39; 34, 39; 36, 39; Two of the twelve gaps 50 formed between 38 and 39 crossed the first straight portion 11 of the first to fifth turn portions 101 to 105 when viewed in the axial direction.
• the second shield member 40 was made of aluminum.
• the dimensions of the second shield member 40 in the first direction D1 and the second direction D2 were 320 mm and 320 mm, respectively. Further, the distance between the first shield member 30 and the second shield member 40 was 1 mm.
• Example 2-2 The coil unit 5 of Example 2-2 was produced in the same manner as in Example 2-1, except that the distance between the magnetic resin layer 20 and the first shield member 30 was 1 mm.
• Comparative example 2-1 The coil unit 5 of Comparative Example 2-1 was produced in the same manner as in Example 2-1 except that the magnetic resin layer 20 was placed apart from the coil 10. The distance between the second main surface 10b of the coil 10 and the magnetic resin layer 20 was 0.1 mm.
• Comparative example 2-2 Coil unit 5 of Comparative Example 2-2 was produced in the same manner as Comparative Example 2-1 except that the distance between the second main surface 10b of the coil 10 and the magnetic resin layer 20 was 1 mm.
• Comparative example 2-3 A coil unit 5 of Comparative Example 2-3 was produced in the same manner as in Example 2-1 except that the magnetic resin layer 20 was not provided.
• Comparative example 2-4 The coil unit 5 of Comparative Example 2-4 was produced in the same manner as Comparative Example 2-3, except that the distance between the first shield member 30 and the second shield member 40 was 6 mm.
• Comparative example 2-5 The coil unit 5 of Comparative Example 2-5 was produced in the same manner as Comparative Example 2-3 except that the distance between the first shield member 30 and the second shield member 40 was 10 mm.
• Comparative example 2-6 The coil unit 5 of Comparative Example 2-6 was produced in the same manner as Comparative Example 2-3 except that the distance between the first shield member 30 and the second shield member 40 was 15 mm.
• FIG. 47 shows the Q value and loss of the coil units of Examples 2-1 to 2-2 and Comparative Examples 2-1 to 2-6.
• the loss of the coil unit 5 of Example 2-1 was significantly lower than that of the coil units 5 of Comparative Examples 2-1 and 2-2. From this, it can be seen that the loss of the coil unit 5 can be significantly reduced by bringing the second main surface 10b of the coil 10 into close contact with the magnetic resin layer 20. In other words, if the second main surface 10b of the coil 10 and the magnetic resin layer 20 are apart, even if the distance between the second main surface 10b and the magnetic resin layer 20 is as small as 0.1 mm. It can be seen that even if there is, the loss of the coil unit 5 increases significantly. Furthermore, there was no significant difference in the loss of the coil unit 5 between Example 2-1 and Example 2-2.
• the coil unit 5 of Example 3-1 is a coil consisting of a spirally formed coil 10, a magnetic resin layer 20, a first shield member 30, and a second shield member 40.
• Unit 5 has been prepared.
• Coil 10 was formed similarly to coil 10 shown in FIGS. 2-5B.
• the coil 10 was made of copper, had a line width of 6 mm, and a thickness of 0.5 mm. Further, the distance between adjacent turn portions 101, 102;...;107, 108 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the magnetic resin layer 20 was formed by curing a two-part curable epoxy resin mixed with magnetic powder.
• the coil 10 was housed in the recess 25 of the magnetic resin layer 20, as shown in FIG. 4, and the second main surface 10b of the coil 10 was in close contact with the magnetic resin layer 20.
• the first shield member 30 was not divided into a plurality of shield pieces 30P. In other words, the gap 50 was not formed in the first shield member 30.
• the first shield member 30 was a ferrite plate. The dimensions of the first shield member 30 in the first direction D1 and the second direction D2 were 300 mm and 300 mm, respectively. Further, the distance between the magnetic resin layer 20 and the first shield member 30 was 1 mm.
• the second shield member 40 was made of aluminum. The dimensions of the second shield member 40 in the first direction D1 and the second direction D2 were 320 mm and 320 mm, respectively. Further, the distance between the first shield member 30 and the second shield member 40 was 1 mm.
• Example 3-2 The coil unit 5 of Example 3-2 was produced in the same manner as in Example 3-1, except that the first shield member 30 was divided into nine shield pieces 30P as in the example shown in FIG.
• the first shield member 30 was divided into three parts in the first direction D1 and into three parts in the second direction D2.
• Each shield piece 30P was a ferrite plate.
• Each of the nine shield pieces 30P was square.
• the dimensions of the nine shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the nine shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the remaining four gaps 50 extend between any one of the first to fourth linear portion groups 11G to 14G and the central axis C along the first direction D1 or the second direction D2 when viewed in the axial direction.
• Example 3-3 The coil unit 5 of Example 3-3 was produced in the same manner as Example 3-1 except that the first shield member 30 was divided into 12 shield pieces 30P.
• the first shield member 30 was divided into four parts in the first direction D1 and into three parts in the second direction D2.
• Each shield piece 30P was a ferrite plate. All of the 12 shield pieces 30P were square.
• the dimensions of the twelve shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the twelve shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm. Two of the 17 gaps 50 formed between the adjacent shield pieces 30P cross the first linear section group 11G or the third linear section group 13G when viewed in the axial direction.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13. Twelve of the seventeen gaps 50 partially cross any one of the first A to first D intermediate curved portions 151G to 154G when viewed in the axial direction.
• the angle between the gap 50 crossing the first intermediate curved portion group 151G and the tangent TL1 of the first A intermediate curved portion group 151G was 45°.
• the angle between the gap 50 crossing the first B intermediate curved portion group 152G and the tangent TL2 of the first B intermediate curved portion group 152G was 45°.
• the angle between the gap 50 crossing the first C intermediate curved portion group 153G and the tangent TL3 of the first C intermediate curved portion group 153G was 45°.
• the angle between the gap 50 crossing the first D intermediate curved portion group 154G and the tangent TL4 of the first D intermediate curved portion group 154G was 45°.
• Two of the seventeen gaps 50 extend along the second direction D2 within the second linear section group 12G or within the fourth linear section group 14G when viewed in the axial direction.
• gaps 50 overlapped with the second linear portion 12 or the fourth linear portion 14 of the second turn portion 102.
• the remaining one gap 50 extended along the second direction D2 between the second linear section group 12G and the fourth linear section group 14G when viewed in the axial direction.
• This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Example 3-4 As shown in FIG. 2, the coil unit 5 of Example 3-4 was produced in the same manner as in Example 3-1, except that the first shield member 30 was divided into four shield pieces 30P.
• the first shield member 30 was divided into two parts in the first direction D1 and into two parts in the second direction D2.
• Each shield piece 30P was a ferrite plate. All of the four shield pieces 30P were square.
• the dimensions of the four shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the four shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the four gaps 50 formed between adjacent shield pieces 30P cross any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the four gaps 50 were formed so that their extension lines passed through the central axis C.
• Example 3-5 As shown in FIG. 22, the coil unit 5 of Example 3-5 was produced in the same manner as in Example 3-1, except that the first shield member 30 was divided into eight shield pieces 30P.
• the eight gaps 50 formed in the first shield member 30 extended radially from the central axis C when viewed in the axial direction.
• Each shield piece 30P was a ferrite plate.
• Each of the eight shield pieces 30P was a right triangle.
• the dimensions of the eight shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the eight shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the gap 50 crossing the first A intermediate curved portion group 151G was perpendicular to the tangent TL1 of the first A intermediate curved portion group 151G.
• the gap 50 crossing the first B intermediate curved portion group 152G was orthogonal to the tangent TL2 of the first B intermediate curved portion group 152G.
• the gap 50 crossing the first C intermediate curved portion group 153G was perpendicular to the tangent TL3 of the first C intermediate curved portion group 153G.
• the gap 50 crossing the first D intermediate curved portion group 154G was orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G. These four gaps 50 were formed so that their extension lines passed through the central axis C.
• Example 3-6 As shown in FIG. 38, the coil unit 5 of Example 3-6 was produced in the same manner as in Example 3-1, except that the first shield member 30 was divided into 12 shield pieces 30P. Each shield piece 30P was a ferrite plate. Four of the 12 shield pieces 30P were square. The remaining eight shield pieces 30P were right triangular. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. Eight of the thirteen gaps 50 formed between adjacent shield pieces 30P cross any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction. When viewed in the axial direction, the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the gap 50 crossing the first A intermediate curved portion group 151G was perpendicular to the tangent TL1 of the first A intermediate curved portion group 151G.
• the gap 50 crossing the first B intermediate curved portion group 152G was orthogonal to the tangent TL2 of the first B intermediate curved portion group 152G.
• the gap 50 crossing the first C intermediate curved portion group 153G was perpendicular to the tangent TL3 of the first C intermediate curved portion group 153G.
• the gap 50 crossing the first D intermediate curved portion group 154G was orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G.
• the remaining one gap 50 extended along the second direction D2 between the second linear section group 12G and the fourth linear section group 14G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Example 3-7 As shown in FIG. 24, the coil unit 5 of Example 3-7 was produced in the same manner as in Example 3-1, except that the first shield member 30 was divided into 13 shield pieces 30P. Each shield piece 30P was a ferrite plate. Five of the 13 shield pieces 30P were square. The remaining eight shield pieces 30P were right triangular. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. Nine of the fourteen gaps 50 formed between adjacent shield pieces 30P cross any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction. When viewed in the axial direction, the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• Four of the fourteen gaps 50 cross any one of the 1A to 1D intermediate curved portion groups 151G to 154G when viewed in the axial direction.
• the gap 50 crossing the first A intermediate curved portion group 151G was orthogonal to the tangent TL1 of the first A intermediate curved portion group 151G.
• the gap 50 crossing the first B intermediate curved portion group 152G was perpendicular to the tangent TL2 of the first B intermediate curved portion group 152G.
• the gap 50 crossing the first C intermediate curved portion group 153G was orthogonal to the tangent TL3 of the first C intermediate curved portion group 153G.
• the gap 50 crossing the first D intermediate curved portion group 154G was orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G.
• the remaining one gap 50 extended along the second direction D2 between the second linear section group 12G and the fourth linear section group 14G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Total loss is the sum of “joule loss” and “iron loss.”
• NP is the number of divisions of the first shield member 30 (the number of shield pieces 30P included in the first shield member 30). For example, “NP9” means that the first shield member 30 is divided into nine parts, and “NP12” means that the first shield member 30 is divided into twelve parts. However, “NP1” means that the first shield member 30 is not divided.
• Example 4-1 The coil unit 5 of Example 4-1 was produced in the same manner as in Example 3-1, except that the coil element 10i was formed into a regular octagonal shape as a whole as in the example shown in FIG.
• the first shield member 30 was not divided into a plurality of shield pieces 30P. In other words, the gap 50 was not formed in the first shield member 30.
• the coil 10 was made of copper, had a line width of 6 mm, and a thickness of 0.5 mm. Further, the distance between adjacent turn portions 101, 102;...;107, 108 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the first shield member 30 was a ferrite plate. The dimensions of the first shield member 30 in the first direction D1 and the second direction D2 were 300 mm and 300 mm, respectively.
• Example 4-2 The coil unit 5 of Example 4-2 was produced in the same manner as in Example 4-1, except that the first shield member 30 was divided into nine shield pieces 30P as in Example 3-2.
• the first shield member 30 was divided into three parts in the first direction D1 and into three parts in the second direction D2.
• Each shield piece 30P was a ferrite plate.
• Each of the nine shield pieces 30P was square.
• the dimensions of the nine shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the nine shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the 12 gaps 50 formed between the adjacent shield pieces 30P are located in any one of the first to fourth linear portion groups 11G to 14G and the first to first D intermediate linear portion groups 161G to 164G when viewed in the axial direction. It traversed at least part of the When viewed in the axial direction, the gap 50 that at least partially crosses the first straight portion group 11G was orthogonal to the first straight portion 11. When viewed in the axial direction, the gap 50 that crosses at least a portion of the second straight portion group 12G was orthogonal to the second straight portion 12. When viewed in the axial direction, the gap 50 that crosses at least a portion of the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 that crosses at least a portion of the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the angle formed by the gap 50 that crosses at least a portion of the first A intermediate linear portion group 161G and the first A intermediate linear portion group 161G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first B intermediate linear portion group 162G and the first B intermediate linear portion group 162G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the 1C intermediate linear portion group 163G and the 1C intermediate linear portion group 163G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first D intermediate linear portion group 164G and the first D intermediate linear portion group 164G was 45°.
• Example 4-3 The coil unit 5 of Example 4-3 was produced in the same manner as in Example 4-1, except that the first shield member 30 was divided into 12 shield pieces 30P as in Example 3-3.
• the first shield member 30 was divided into four parts in the first direction D1 and into three parts in the second direction D2.
• Each shield piece 30P was a ferrite plate. All of the 12 shield pieces 30P were square.
• the dimensions of the twelve shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the twelve shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• 16 of the 17 gaps 50 formed between adjacent shield pieces 30P are located in the first to fourth linear portion groups 11G to 14G and the first to first D intermediate linear portion groups 161G to 161G. It traversed at least a portion of either 164G.
• the gap 50 that crosses at least a portion of the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 that crosses at least a portion of the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 that crosses at least a portion of the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 that crosses at least a portion of the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the angle formed by the gap 50 that crosses at least a portion of the first A intermediate linear portion group 161G and the first A intermediate linear portion group 161G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first B intermediate linear portion group 162G and the first B intermediate linear portion group 162G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the 1C intermediate linear portion group 163G and the 1C intermediate linear portion group 163G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first D intermediate linear portion group 164G and the first D intermediate linear portion group 164G was 45°.
• the remaining one gap 50 extended along the second direction D2 between the second linear section group 12G and the fourth linear section group 14G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Example 4-4 The coil unit 5 of Example 4-4 was produced in the same manner as in Example 4-1, except that the first shield member 30 was divided into four shield pieces 30P as in Example 3-4.
• the first shield member 30 was divided into two parts in the first direction D1 and into two parts in the second direction D2.
• Each shield piece 30P was a ferrite plate. All of the four shield pieces 30P were square.
• the dimensions of the four shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the four shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the four gaps 50 formed between adjacent shield pieces 30P cross any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the four gaps 50 were formed so that their extension lines passed through the central axis C.
• Example 4-5 The coil unit 5 of Example 4-5 was produced in the same manner as in Example 4-1, except that the first shield member 30 was divided into eight shield pieces 30P as in Example 3-5.
• the eight gaps 50 formed in the first shield member 30 extended radially from the central axis C when viewed in the axial direction.
• Each shield piece 30P was a ferrite plate.
• Each of the eight shield pieces 30P was a right triangle.
• the dimensions of the eight shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the eight shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the gap 50 crossing the first A intermediate straight portion group 161G was orthogonal to the first A intermediate straight portion group 161G.
• the gap 50 crossing the first B intermediate straight portion group 162G was orthogonal to the first B intermediate straight portion group 162G.
• the gap 50 crossing the 1C intermediate straight portion group 163G was orthogonal to the 1C intermediate straight portion group 163G.
• the gap 50 crossing the first D intermediate straight portion group 164G was orthogonal to the first D intermediate straight portion group 164G.
• Example 4-6 The coil unit 5 of Example 4-6 was produced in the same manner as in Example 4-1, except that the first shield member 30 was divided into 12 shield pieces 30P as in Example 3-6. Each shield piece 30P was a ferrite plate. Four of the 12 shield pieces 30P were square. The remaining eight shield pieces 30P were right triangular. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. Eight of the thirteen gaps 50 formed between adjacent shield pieces 30P cross any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction. When viewed in the axial direction, the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• the gap 50 crossing the first B intermediate straight portion group 162G was orthogonal to the first B intermediate straight portion group 162G.
• the gap 50 crossing the 1C intermediate straight portion group 163G was orthogonal to the 1C intermediate straight portion group 163G.
• the gap 50 crossing the first D intermediate straight portion group 164G was orthogonal to the first D intermediate straight portion group 164G.
• the remaining one gap 50 extended along the second direction D2 between the second linear section group 12G and the fourth linear section group 14G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Example 4-7 The coil unit 5 of Example 4-7 was produced in the same manner as in Example 4-1, except that the first shield member 30 was divided into 13 shield pieces 30P as in Example 3-7. Each shield piece 30P was a ferrite plate. Five of the 13 shield pieces 30P were square. The remaining eight shield pieces 30P were right triangular. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. Nine of the fourteen gaps 50 formed between adjacent shield pieces 30P cross any one of the first to fourth linear portion groups 11G to 14G when viewed in the axial direction. When viewed in the axial direction, the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the fourth straight portion group 14G was orthogonal to the fourth straight portion 14.
• Four of the fourteen gaps 50 cross any one of the 1A to 1D intermediate curved portion groups 151G to 154G when viewed in the axial direction.
• the gap 50 crossing the first A intermediate curved portion group 151G was orthogonal to the tangent TL1 of the first A intermediate curved portion group 151G.
• the gap 50 crossing the first B intermediate curved portion group 152G was perpendicular to the tangent TL2 of the first B intermediate curved portion group 152G.
• the gap 50 crossing the first C intermediate curved portion group 153G was orthogonal to the tangent TL3 of the first C intermediate curved portion group 153G.
• the gap 50 crossing the first D intermediate curved portion group 154G was orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G.
• the remaining one gap 50 extended along the second direction D2 between the second linear section group 12G and the fourth linear section group 14G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Total loss is the sum of “joule loss” and “iron loss.”
• NP is the number of divisions of the first shield member 30 (the number of shield pieces 30P included in the first shield member 30). For example, “NP9” means that the first shield member 30 is divided into nine parts, and “NP12” means that the first shield member 30 is divided into twelve parts. However, “NP1” means that the first shield member 30 is not divided.
• FIG. 50 shows the Q values of the coil units 5 of Examples 3-1 to 3-7 and Examples 4-1 to 4-7.
• E3-1 to E3-7 mean Examples 3-1 to 3-7, respectively.
• E4-1 to E4-7 mean Examples 4-1 to 4-7, respectively. From FIG. 50, if other conditions are the same, the Q value of the coil unit 5 having the coil 10 having an octagonal shape as a whole is higher than that of the coil 10 having a rectangular shape as a whole and including the first intermediate curved portions 151G to 154G. It is understood that the Q value is higher than the Q value of the provided coil unit 5.
• Example 5-1 a coil 10 including coil elements 10j and 10jj formed in a spiral shape, a magnetic resin layer 20, and a first shield member 30 and the second shield member 40 was prepared.
• the coil 10 was formed similarly to the coil 10 shown in FIGS. 17-19.
• the coil elements 10j, 10jj were made of copper, had a line width of 6 mm, and a thickness of 0.5 mm. Further, in each coil element 10j, 10jj, the distance between adjacent turn portions 101, 102;...;104, 105 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the magnetic resin layer 20 was formed by curing a two-part curable epoxy resin mixed with magnetic powder.
• the coil 10 was embedded in the magnetic resin layer 20 as shown in FIG. 18, and the second main surface 10b of the coil 10 was in close contact with the magnetic resin layer 20.
• the first shield member 30 was not divided into a plurality of shield pieces 30P. In other words, the gap 50 was not formed in the first shield member 30.
• the first shield member 30 was a ferrite plate.
• the dimensions of the first shield member 30 in the first direction D1 and the second direction D2 were 300 mm and 300 mm, respectively. Further, the distance between the magnetic resin layer 20 and the first shield member 30 was 0 mm. That is, the magnetic resin layer 20 and the first shield member 30 were in close contact with each other.
• the second shield member 40 was made of aluminum.
• the dimensions of the second shield member 40 in the first direction D1 and the second direction D2 were 320 mm and 320 mm, respectively. Further, the distance between the first shield member 30 and the second shield member 40 was 1 mm.
• Example 5-2 The coil unit 5 of Example 5-2 was produced in the same manner as in Example 5-1, except that the first shield member 30 was divided into nine shield pieces 30P as in the example shown in FIG.
• the first shield member 30 was divided into three parts in the first direction D1 and into three parts in the second direction D2.
• Each shield piece 30P was a ferrite plate.
• Each of the nine shield pieces 30P was square.
• the dimensions of the nine shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the nine shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• Example 5-3 The coil unit 5 of Example 5-3 was produced in the same manner as Example 5-1 except that the first shield member 30 was divided into 12 shield pieces 30P.
• the first shield member 30 was divided into three parts in the first direction D1 and into four parts in the second direction D2.
• Each shield piece 30P was a ferrite plate. All of the 12 shield pieces 30P were square.
• the dimensions of the twelve shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the twelve shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• One of the 17 gaps 50 formed between adjacent shield pieces 30P crossed the second linear portion group 12G when viewed in the axial direction.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• 12 of the 17 gaps 50 cross at least a portion of any one of the 1A to 1D intermediate curved portions 151G to 154G.
• the angle between the gap 50 that crosses at least a portion of the first A intermediate curved portion group 151G and the tangent TL1 of the first A intermediate curved portion group 151G was 45°.
• the angle between the gap 50 that crosses at least a portion of the first B intermediate curved portion group 152G and the tangent TL2 of the first B intermediate curved portion group 152G was 45°.
• the angle between the gap 50 that crosses at least a portion of the first C intermediate curved portion group 153G and the tangent TL3 of the first C intermediate curved portion group 153G was 45°.
• the angle between the gap 50 that crosses at least a portion of the first D intermediate curved portion group 154G and the tangent TL4 of the first D intermediate curved portion group 154G was 45°.
• One of the seventeen gaps 50 traversed the plurality of turn connections 16 when viewed in the axial direction. Two of the seventeen gaps 50 extend along the first direction D1 within the first linear section group 11G or the third linear section group 13G when viewed in the axial direction.
• gaps 50 overlapped with the first straight part 11 or the third straight part 13 of the second turn part 102.
• the remaining one gap 50 extends along the first direction D1 between the first linear section group 11G and the third linear section group 13G when viewed in the axial direction.
• This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Example 5-4 As shown in FIG. 23, the coil unit 5 of Example 5-4 was produced in the same manner as in Example 5-1, except that the first shield member 30 was divided into eight shield pieces 30P. .
• the eight gaps 50 formed in the first shield member 30 extended radially from the central axis C when viewed in the axial direction.
• Each shield piece 30P was a ferrite plate.
• Each of the eight shield pieces 30P was a right triangle.
• the dimensions of the eight shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the eight shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• Three of the eight gaps 50 formed between adjacent shield pieces 30P cross any one of the first to third linear portion groups 11G to 13G when viewed in the axial direction.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• the gap 50 crossing the first A intermediate curved portion group 151G was orthogonal to the tangent TL1 of the first A intermediate curved portion group 151G.
• the gap 50 crossing the first B intermediate curved portion group 152G was perpendicular to the tangent TL2 of the first B intermediate curved portion group 152G.
• the gap 50 crossing the first C intermediate curved portion group 153G was orthogonal to the tangent TL3 of the first C intermediate curved portion group 153G.
• the gap 50 crossing the first D intermediate curved portion group 154G was orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G. These four gaps 50 were formed so that their extension lines passed through the central axis C.
• Example 5-5 As shown in FIG. 33, the coil unit 5 of Example 5-5 was produced in the same manner as in Example 5-1, except that the first shield member 30 was divided into 12 shield pieces 30P. . Each shield piece 30P was a ferrite plate. Four of the 12 shield pieces 30P were square. The remaining eight shield pieces 30P were right triangular. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. Six of the thirteen gaps 50 formed between adjacent shield pieces 30P cross any one of the first to third linear portion groups 11G to 13G when viewed in the axial direction. When viewed in the axial direction, the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• Two of the thirteen gaps 50 traversed the plurality of turn connections 16 when viewed in the axial direction.
• Four of the thirteen gaps 50 cross at least part of the 1A to 1D intermediate curved portion groups 151G to 154G when viewed in the axial direction.
• the gap 50 crossing the first A intermediate curved portion group 151G was orthogonal to the tangent TL1 of the first A intermediate curved portion group 151G.
• the gap 50 crossing the first B intermediate curved portion group 152G was perpendicular to the tangent TL2 of the first B intermediate curved portion group 152G.
• the gap 50 crossing the first C intermediate curved portion group 153G was orthogonal to the tangent TL3 of the first C intermediate curved portion group 153G.
• the gap 50 crossing the first D intermediate curved portion group 154G was orthogonal to the tangent TL4 of the first D intermediate curved portion group 154G.
• the remaining one gap 50 extended along the second direction D2 between the second straight portion group 12G and the plurality of turn connecting portions 16 when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Total loss is the sum of “joule loss” and “iron loss.”
• NP is the number of divisions of the first shield member 30 (the number of shield pieces 30P included in the first shield member 30). For example, “NP9” means that the first shield member 30 is divided into nine parts, and “NP12” means that the first shield member 30 is divided into twelve parts. However, “NP1” means that the first shield member 30 is not divided.
• Example 6-1 The coil unit 5 of Example 6-1 was produced in the same manner as in Example 5-1, except that the coil elements 10j and 10jj were formed into a regular octagonal shape as a whole as in the example shown in FIG.
• the first shield member 30 was not divided into a plurality of shield pieces 30P. In other words, the gap 50 was not formed in the first shield member 30.
• the coil 10 was made of copper, had a line width of 6 mm, and a thickness of 0.5 mm. Further, the distance between adjacent turn portions 101, 102;...;104, 105 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the first shield member 30 was a ferrite plate. The dimensions of the first shield member 30 in the first direction D1 and the second direction D2 were 300 mm and 300 mm, respectively.
• Example 6-2 The coil unit 5 of Example 6-2 was produced in the same manner as in Example 6-1, except that the first shield member 30 was divided into nine shield pieces 30P as in Example 5-2.
• the first shield member 30 was divided into three parts in the first direction D1 and into three parts in the second direction D2.
• Each shield piece 30P was a ferrite plate.
• Each of the nine shield pieces 30P was square.
• the dimensions of the nine shield pieces 30P in the first direction D1 were equal to each other.
• the dimensions of the nine shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• the 12 gaps 50 formed between the adjacent shield pieces 30P are located in any one of the first to third linear portion groups 11G to 13G and the first to first D intermediate linear portion groups 161G to 164G when viewed in the axial direction. It traversed at least part of the When viewed in the axial direction, the gap 50 that crosses at least a portion of the first straight portion group 11G was orthogonal to the first straight portion 11. When viewed in the axial direction, the gap 50 that crosses at least a portion of the second straight portion group 12G was orthogonal to the second straight portion 12. When viewed in the axial direction, the gap 50 that crosses at least a portion of the third straight portion group 13G was orthogonal to the third straight portion 13.
• the angle formed by the gap 50 that crosses at least a portion of the first A intermediate linear portion group 161G and the first A intermediate linear portion group 161G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first B intermediate linear portion group 162G and the first B intermediate linear portion group 162G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the 1C intermediate linear portion group 163G and the 1C intermediate linear portion group 163G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first D intermediate linear portion group 164G and the first D intermediate linear portion group 164G was 45°.
• Example 6-3 The coil unit 5 of Example 6-3 was produced in the same manner as in Example 6-1 except that the first shield member 30 was divided into the small shield pieces 30P of Example 5-312. The first shield member 30 was divided into three parts in the first direction D1 and into four parts in the second direction D2. Each shield piece 30P was a ferrite plate. All of the 12 shield pieces 30P were square. The dimensions of the twelve shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the twelve shield pieces 30P in the second direction D2 were equal to each other. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. One of the 17 gaps 50 formed between adjacent shield pieces 30P crossed the second linear portion group 12G when viewed in the axial direction.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• 12 of the 17 gaps 50 cross at least a portion of any one of the first to third linear portion groups 11G to 13G and the first to first D intermediate linear portion groups 161G to 164G. was.
• the gap 50 that crosses at least a portion of the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 that crosses at least a portion of the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 that crosses at least a portion of the third straight portion group 13G was orthogonal to the third straight portion 13.
• the angle formed by the gap 50 that crosses at least a portion of the first A intermediate linear portion group 161G and the first A intermediate linear portion group 161G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first B intermediate linear portion group 162G and the first B intermediate linear portion group 162G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the 1C intermediate linear portion group 163G and the 1C intermediate linear portion group 163G was 45°.
• the angle formed by the gap 50 that crosses at least a portion of the first D intermediate linear portion group 164G and the first D intermediate linear portion group 164G was 45°.
• Two of the twelve gaps 50 extend along the first direction D1 within the first linear section group 11G or the third linear section group 13G when viewed in the axial direction. These gaps 50 overlapped with the first straight part 11 or the third straight part 13 of the second turn part 102.
• One of the seventeen gaps 50 traversed the plurality of turn connections 16 when viewed in the axial direction.
• the remaining one gap 50 extends along the first direction D1 between the first linear section group 11G and the third linear section group 13G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Example 6-4 The coil unit 5 of Example 6-4 was produced in the same manner as in Example 6-1, except that the first shield member 30 was divided into eight shield pieces 30P as in Example 5-4.
• the eight gaps 50 formed in the first shield member 30 extended radially from the central axis C when viewed in the axial direction.
• Each shield piece 30P was a ferrite plate.
• Each of the eight shield pieces 30P was a right triangle.
• the dimensions of the eight shield pieces 30P in the first direction D1 were equal to each other. Further, the dimensions of the eight shield pieces 30P in the second direction D2 were equal to each other.
• the width of the gap 50 between adjacent shield pieces 30P was 5 mm.
• Three of the eight gaps 50 formed between adjacent shield pieces 30P cross any one of the first to third linear portion groups 11G to 13G when viewed in the axial direction.
• the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• One of the eight gaps 50 traversed the plurality of turn connections 16 when viewed in the axial direction.
• the remaining four gaps crossed any one of the 1A to 1D intermediate straight portion groups 161G to 164G when viewed in the axial direction.
• the gap 50 crossing the first A intermediate straight portion group 161G was orthogonal to the first A intermediate straight portion group 161G.
• the gap 50 crossing the first B intermediate straight portion group 162G was orthogonal to the first B intermediate straight portion group 162G.
• the gap 50 crossing the 1C intermediate straight portion group 163G was orthogonal to the 1C intermediate straight portion group 163G.
• the gap 50 crossing the first D intermediate straight portion group 164G was orthogonal to the first D intermediate straight portion group 164G.
• Example 6-5 The coil unit 5 of Example 6-5 was produced in the same manner as in Example 6-1, except that the first shield member 30 was divided into 12 shield pieces 30P as in Example 5-5. Each shield piece 30P was a ferrite plate. Four of the 12 shield pieces 30P were square. The remaining eight shield pieces 30P were right triangular. The width of the gap 50 between adjacent shield pieces 30P was 5 mm. Six of the thirteen gaps 50 formed between adjacent shield pieces 30P cross any one of the first to third linear portion groups 11G to 13G when viewed in the axial direction. When viewed in the axial direction, the gap 50 crossing the first straight portion group 11G was orthogonal to the first straight portion 11.
• the gap 50 crossing the second straight portion group 12G was orthogonal to the second straight portion 12.
• the gap 50 crossing the third straight portion group 13G was orthogonal to the third straight portion 13.
• Two of the thirteen gaps 50 traversed the plurality of turn connections 16 when viewed in the axial direction.
• Four of the thirteen gaps 50 cross any one of the 1A to 1D intermediate straight portion groups 161G to 164G when viewed in the axial direction.
• the gap 50 crossing the first A intermediate straight portion group 161G was orthogonal to the first A intermediate straight portion group 161G.
• the gap 50 crossing the first B intermediate straight portion group 162G was orthogonal to the first B intermediate straight portion group 162G.
• the gap 50 crossing the 1C intermediate straight portion group 163G was orthogonal to the 1C intermediate straight portion group 163G.
• the gap 50 crossing the first D intermediate straight portion group 164G was orthogonal to the first D intermediate straight portion group 164G.
• the remaining one gap 50 extends along the first direction D1 between the first linear section group 11G and the third linear section group 13G when viewed in the axial direction. This gap 50 overlapped with the central axis C when viewed in the axial direction.
• Total loss is the sum of “joule loss” and “iron loss.”
• NP is the number of divisions of the first shield member 30 (the number of shield pieces 30P included in the first shield member 30). For example, “NP9” means that the first shield member 30 is divided into nine parts, and “NP12” means that the first shield member 30 is divided into twelve parts. However, “NP1” means that the first shield member 30 is not divided.
• FIG. 53 shows the Q values of the coil units 5 of Examples 5-1 to 5-5 and Examples 6-1 to 6-5.
• E5-1 to E5-5 mean Examples 5-1 to 5-5, respectively.
• E6-1 to E6-5 mean Examples 6-1 to 6-5, respectively. From FIG. 53, if other conditions are the same, the Q value of the coil unit 5 having the coil 10 having an octagonal shape as a whole is higher than that of the coil 10 having a rectangular shape as a whole and including the first intermediate curved portions 151G to 154G. It is understood that the Q value is higher than the Q value of the provided coil unit 5.
• Example 7-1 The coil unit 5 of Example 7-1 was produced in the same manner as in Example 3-2. The distance between the first shield member 30 and the second shield member 40 was 1 mm as in Example 3-2.
• Example 7-4> The coil unit 5 of Example 7-4 was produced in the same manner as Example 7-3 except that the distance between the first shield member 30 and the second shield member 40 was 10 mm.
• Coil unit 5 of Comparative Example 7-1 was produced in the same manner as in Example 7-1, except that coil 10 was formed of litz wire.
• the Litz wire used was one in which 1,600 enamelled wires with a diameter of 0.05 mm were twisted together.
• Coil 10 consisted of a single coil element with eight turns 101-108. The thickness (diameter) of the litz wire was 3.0 mm. The distance between adjacent turn parts 101, 102;...;107, 108 was 6 mm.
• the dimensions of the coil 10 along the first direction D1 and the second direction D2 were 295 mm and 295 mm, respectively.
• the magnetic resin layer 20 was in direct contact with the litz wire. However, since the litz wire is composed of an enameled wire, the magnetic resin layer 20 and the conductor of the litz wire were not in direct contact.
• the distance between the first shield member 30 and the second shield member 40 was 1 mm as in Example 7-1. Viewed in the axial direction, the shape and dimensions of the contour of the coil 10 of Comparative Example 7-1 were approximately the same as the contour of the coil 10 of Example 7-1.
• FIGS. 54 and 55 illustrate how the first shield member 30 is divided.
• 54 and 55 illustrate how the first shield member 30 of Examples 7-1 to 7-2 and Comparative Examples 7-1 to 7-2 is divided.
• FIGS. 54 and 55 shows how the first shield member 30 of Examples 7-3 to 7-4 and Comparative Examples 7-3 to 7-4 is divided.
• the first shield member 30 and the shield piece 30P are shown in solid lines, and the outline of the coil 10 is shown in broken lines.
• FIGS. 54 and 55 are views of the first shield member 30 and the coil 10 as viewed in the axial direction.
• the Q values of the coil units 5 of Examples 7-1 to 7-4 are 110, 150, 187, and 205, respectively.
• the Q values of the coil units of Comparative Examples 7-1 to 7-4 are 300, 396, 335, and 426, respectively.
• Example 7-1 shows the comparison results of the Q value of Example 7-1 and Example 7-2, the comparison result of the Q value of Example 7-3 and Example 7-4, Comparative Example 7-1 and Comparative Example 7-
• the comparison results of the Q values of No. 2 and the Q values of Comparative Example 7-3 and Comparative Example 7-4 are shown.
• the Q value of Example 7-1 is 73% of the Q value of Example 7-2.
• the Q value of Example 7-3 is 91% of the Q value of Example 7-4.
• the Q value of Comparative Example 7-1 is 76% of the Q value of Comparative Example 7-2.
• the Q value of Comparative Example 7-3 is 79% of the Q value of Comparative Example 7-4.
• the coil 10 is formed from a plate-shaped coil element 10i, a decrease in the Q value is significantly suppressed compared to the case where the coil 10 is formed from a litz wire.
• FIG. 56 is a diagram showing the coil unit 5 shown in FIG. 44 together with the inner contour line OL of the coil 10.
• the inner contour line OL is along the straight parts 11 to 13 and the first intermediate straight parts 161 to 164 of the straight parts forming the first turn part 101 of the coil elements 10j and 10jj.
• the length of the side parallel to the straight line portions 11 to 13 is set to a
• the length of the side parallel to the intermediate straight line parts 161 to 164 is set to b.
• line SS indicates a regular square.
• the dimensions of the square SS in the first direction D1 and the second direction D2 are the same as the dimensions of the inner contour line OL in the first direction D1 and the second direction D2.
• the dimensions of the square SS shown in FIGS. 57 to 60 in the first direction D1 and in the second direction D2 are equal to each other.
• the dimensions of the inner contour line OL shown in FIGS. 57 to 60 in the first direction D1 and the second direction D2 are equal to each other.
• Example 8-1 As the coil unit 5 of Example 8-1, two coil units manufactured in the same manner as the coil unit 5 of Example 4-1 were prepared. As shown in FIG. 57, the length a and the length b of the inner contour line OL of the coil 10 were equal. In other words, the coil 10 was formed into a regular octagonal shape as a whole when viewed in the axial direction. The length b was 57.7 mm.
• one of the coil units 5 of Example 8-1 produced in this way is used as a power transmission coil unit, the other is used as a power reception coil unit, and the coil 10 of the power transmission coil unit 5 and the coil 10 of the power reception coil unit 5 are connected.
• the power transmitting coil unit 5 and the power receiving coil unit 5 are arranged so that they face each other.
• a high frequency current of 85 kHz was applied to the coil 10 of the power transmitting coil unit 5 to electromagnetically couple the power transmitting coil unit 5 and the power receiving coil unit 5.
• the Q value of the power transmitting coil unit 5 and the coupling coefficient of the power transmitting coil unit 5 were measured.
• Example 8-2 As shown in FIG. 58, two coil units 5 were prepared in the same manner as in Example 8-1 except that the length b was longer than the length a, and two coil units were prepared as the coil units of Example 8-2. did.
• the length b was 70 mm.
• one of the coil units 5 of Example 8-2 produced in this way is used as a power transmission coil unit, the other is used as a power reception coil unit, and the coil 10 of the power transmission coil unit 5 and the coil 10 of the power reception coil unit 5 are connected.
• the power transmitting coil unit 5 and the power receiving coil unit 5 are arranged so that they face each other.
• a high frequency current of 85 kHz was applied to the coil 10 of the power transmitting coil unit 5 to electromagnetically couple the power transmitting coil unit 5 and the power receiving coil unit 5.
• the Q value of the power transmitting coil unit 5 and the coupling coefficient of the power transmitting coil unit 5 were measured.
• Example 8-3 As shown in FIG. 59, two coil units 5 were prepared in the same manner as in Example 8-1 except that the length b was shorter than the length a, and two coil units were prepared as the coil units of Example 8-3. did.
• the length b was 40 mm.
• one of the coil units 5 of Example 8-3 produced in this way is used as a power transmission coil unit, the other is used as a power reception coil unit, and the coil 10 of the power transmission coil unit 5 and the coil 10 of the power reception coil unit 5 are connected.
• the power transmitting coil unit 5 and the power receiving coil unit 5 are arranged so that they face each other.
• a high frequency current of 85 kHz was applied to the coil 10 of the power transmitting coil unit 5 to electromagnetically couple the power transmitting coil unit 5 and the power receiving coil unit 5.
• the Q value of the power transmitting coil unit 5 and the coupling coefficient of the power transmitting coil unit 5 were measured.
• Example 8-4 As shown in FIG. 60, the coil unit 5 manufactured in the same manner as in Example 8-1 except that the length b is shorter than that in Example 8-3 is replaced with the coil unit 5 of Example 8-4. Two units were prepared. The length b was 20 mm.
• one of the coil units 5 of Example 8-4 produced in this way is used as a power transmission coil unit, the other is used as a power reception coil unit, and the coil 10 of the power transmission coil unit 5 and the coil 10 of the power reception coil unit 5 are connected.
• the power transmitting coil unit 5 and the power receiving coil unit 5 are arranged so that they face each other.
• a high frequency current of 85 kHz was applied to the coil 10 of the power transmitting coil unit 5 to electromagnetically couple the power transmitting coil unit 5 and the power receiving coil unit 5.
• the Q value of the power transmitting coil unit 5 and the coupling coefficient of the power transmitting coil unit 5 were measured.
• FIG. 61 shows the Q values of the coil units 5 of Examples 8-1 to 8-4.
• FIG. 62 shows the coupling coefficients of the coil units 5 of Examples 8-1 to 8-4.
• FIG. 63 shows the product of the coupling coefficient and Q value of the coil units 5 of Examples 8-1 to 8-4.
• E8-1 to E8-4 mean Examples 8-1 to 8-4, respectively. As understood from FIGS.
• the coil unit 5 includes a coil 10 including coil elements 10i; 10j, 10jj formed in a spiral shape around an arbitrary central axis C, and a magnetic resin. It includes a layer 20, a first shield member 30, and a second shield member 40.
• the coil 10 has a first main surface 10a and a second main surface 10b, which is a surface opposite to the first main surface 10a.
• the magnetic resin layer 20 is in direct contact with the second main surface 10b of the coil 10.
• the coil 10, the magnetic resin layer 20, the first shield member 30, and the second shield member 40 are laminated in this order in the direction from the first main surface 10a to the second main surface 10b.
• the first shield member 30 is divided into a plurality of shield pieces 30P.
• the first shield member 30 since the first shield member 30 is divided into the small shield pieces 30P, the first shield member 30 can be easily manufactured. This contributes to improving the manufacturing efficiency of the coil unit 5.
• the coil unit 5 includes the magnetic resin layer 20 that is in direct contact with the second main surface 10b of the coil 10. Thereby, the loss of the coil unit 5 ( (heat generation) can be suppressed. Therefore, the dimensions of the coil unit 5 can be reduced while suppressing an increase in the loss of the coil unit 5.
• the coil elements 10i; 10j, 10jj include a conductor 10E having a spiral shape.
• the magnetic resin layer 20 is in direct contact with the conductor 10E.
• the first shield member 30 includes ferrite.
• the distance between the first shield member 30 and the second shield member 40 may be 2 mm or less.
• the coil unit 5 includes the magnetic resin layer 20 in direct contact with the second main surface 10b of the coil 10, so that the second shield member 40 is connected to the first shield. Increase in loss of the coil unit 5 due to proximity to the member 30 can be suppressed. Therefore, the distance between the first shield member 30 and the second shield member 40 can be set to 2 mm or less, and the dimension of the coil unit 5 along the axial direction can be reduced.
• a heat conductive member 45 is disposed between the first shield member 30 and the second shield member 40.
• the spacer 45 can promote heat radiation from the coil unit 5.
• the coil elements 10i; and a second straight part group 12G comprising a plurality of second straight parts 12 arranged in the radial direction and extending in a second direction D2 non-parallel to the first direction D1
• the second straight part 12 includes a second straight part group 12G connected to the adjacent first straight part 11.
• a gap 50 is formed in the first shield member 30, which extends linearly between adjacent shield pieces 30P and crosses at least a portion of the first linear portion group 11G when viewed in the axial direction. .
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the angle formed by the gap 50 and at least a part of the first straight portion group 11G is 80° when viewed in the axial direction. ⁇ 100°.
• the gap 50 and at least a portion of the first linear portion group 11G are perpendicular to each other when viewed in the axial direction.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed. be able to.
• the gap 50 is arranged from radially inward than the first straight portion group 11G to radially smaller than the first straight portion group 11G. It extends outward in the direction.
• the gap 50 of the first shield member 30 is between the second straight portion group 12G and the central axis C when viewed in the axial direction. is extending. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the gap 50 or its extension line overlaps with the central axis C when viewed in the axial direction. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the first shield member 30 has another gap 50 extending linearly between the adjacent shield pieces 30P in the axial direction.
• Another gap 50 is formed which extends along the first straight part 11 within the first straight part group 11G.
• the other gap 50 is the smallest integer equal to or greater than the value obtained by dividing the total number of the plurality of first straight parts 11 by three, counting from the innermost first straight part 11 among the plurality of first straight parts 11.
• the first linear portion 11 extends on the central axis C side. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the first shield member 30 has another gap 50 extending linearly between the adjacent shield pieces 30P in the axial direction.
• Another gap 50 is formed which extends along the second straight portion 12 within the second straight portion group 12G.
• the other gap 50 is the smallest integer equal to or greater than the value obtained by dividing the total number of the plurality of second straight parts 12 by three, counting from the innermost second straight part 12 among the plurality of second straight parts 12.
• the second linear portion 12 extends on the central axis C side. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the first shield member 30 has another gap 50 extending linearly between the adjacent shield pieces 30P in the axial direction.
• Another gap 50 is formed which extends along the first straight part 11 within the first straight part group 11G.
• the other gap 50 is the smallest integer equal to or greater than the value obtained by dividing the total number of the plurality of first straight parts 11 by three, counting from the outermost first straight part 11 among the plurality of first straight parts 11.
• the first linear portion 11 extends on the side opposite to the central axis C side. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the first shield member 30 has another gap 50 extending linearly between the adjacent shield pieces 30P in the axial direction.
• Another gap 50 is formed which extends along the second straight portion 12 within the second straight portion group 12G.
• the other gap 50 is the smallest integer equal to or greater than the value obtained by dividing the total number of the plurality of second straight parts 12 by three, counting from the outermost second straight part 12 among the plurality of second straight parts 12.
• the second linear portion 12 extends on the side opposite to the central axis C side. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the coil elements 10i; 10j, 10jj include a first straight part group 11G, a second straight part group 12G, and an intermediate curved part
• the group further includes a group 151G.
• the first linear section group 11G includes a plurality of first linear sections 11 arranged in the radial direction and extending in the first direction D1.
• the second linear portion group 12G includes a plurality of second linear portions 12 that are arranged in the radial direction and extend in a second direction D2 that is non-parallel to the first direction D1.
• the intermediate curved section group 151G is arranged between the first straight section group 11G and the second straight section group 12G, and is made up of a plurality of intermediate curved sections 151. Adjacent end portions of the first straight portion 11 and the second straight portion 12 are connected via an intermediate curved portion 151.
• the first shield member 30 is formed with a gap 50 that extends linearly between the adjacent shield pieces 30P.
• the gap 50 crosses at least a portion of the intermediate curved portion group 151G when viewed in the axial direction. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the angle formed by the gap 50 and the tangent line TL1 of at least a part of the intermediate curved portion group 151G is 80° when viewed in the axial direction. It is between 100° and 100°. In this case, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed. can do.
• the gap 50 and the tangent line TL1 are perpendicular to each other when viewed in the axial direction.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed. be able to.
• the coil elements 10i; It further includes a subgroup 161G.
• the first linear section group 11G includes a plurality of first linear sections 11 arranged in the radial direction and extending in the first direction D1.
• the second linear portion group 12G includes a plurality of second linear portions 12 that are arranged in the radial direction and extend in a second direction D2 that is non-parallel to the first direction D1.
• the first intermediate straight portion group 161G is arranged between the first straight portion group 11G and the second straight portion group 12G, and is made up of a plurality of first intermediate straight portions 161. Adjacent end portions of the first straight portion 11 and the second straight portion 12 are connected via a first intermediate straight portion 161.
• the angle formed by the first straight portion 11 and the first intermediate straight portion 161 is 125° to 145° when viewed in the axial direction. be. Further, when viewed in the axial direction, the angle formed by the second straight portion 12 and the first intermediate straight portion 161 is 125° to 145°. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the angle formed by the first straight portion 11 and the first intermediate straight portion 161 is 135° when viewed in the axial direction. Further, when viewed in the axial direction, the angle between the second straight portion 12 and the first intermediate straight portion 161 is 135°. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be more effectively suppressed.
• the coil elements 10i; 10j, 10jj have an octagonal shape as a whole. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the coil elements 10i; 10j, 10jj have a regular octagonal shape as a whole. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be more effectively suppressed.
• the first shield member 30 is formed with a gap 50 that extends linearly between the adjacent shield pieces 30P.
• the gap 50 crosses at least a portion of the first intermediate straight portion group 161G when viewed in the axial direction. According to such a coil unit 5, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the angle formed by the gap 50 and at least a portion of the first intermediate straight portion group 161G is 80° when viewed in the axial direction. It is between 100° and 100°. In this case, an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed. can.
• the gap 50 and at least a portion of the first intermediate straight portion group 161G are perpendicular to each other when viewed in the axial direction.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed. be able to.
• the coil elements 10i; It further includes a section group 161G and a second intermediate straight section group 171G.
• the first linear section group 11G includes a plurality of first linear sections 11 arranged in the radial direction and extending in the first direction D1.
• the second linear portion group 12G includes a plurality of second linear portions 12 that are arranged in the radial direction and extend in a second direction D2 that is non-parallel to the first direction D1.
• the first intermediate straight portion group 161G is arranged between the first straight portion group 11G and the second straight portion group 12G, and is made up of a plurality of first intermediate straight portions 161.
• the second intermediate straight portion group 171G is arranged between the first intermediate straight portion group 161G and the second straight portion group 12G, and includes a plurality of second intermediate straight portions 171. Adjacent end portions of the first straight portion 11 and the second straight portion 12 are connected via a first intermediate straight portion 161. Adjacent ends of the first intermediate straight portion 161 and the second straight portion 12 are connected via a second intermediate straight portion 171.
• the angle formed by the first straight portion 11 and the first intermediate straight portion 161 is 140° to 160° when viewed in the axial direction. be. Furthermore, when viewed in the axial direction, the angle formed by the first intermediate straight portion 161 and the second intermediate straight portion 171 is 140° to 160°. Further, when viewed in the axial direction, the angle formed by the second intermediate straight portion 171 and the second straight portion 12 is 140° to 160°. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed.
• the angle formed by the first straight portion 11 and the first intermediate straight portion 161 is 150° when viewed in the axial direction. Further, when viewed in the axial direction, the angle formed by the first intermediate straight portion 161 and the second intermediate straight portion 171 is 150°. Further, when viewed in the axial direction, the angle between the second intermediate straight portion 171 and the second straight portion 12 is 150°. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be more effectively suppressed.
• the coil elements 10i; 10j, 10jj have a dodecagonal shape as a whole. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be more effectively suppressed.
• the coil elements 10i; 10j, 10jj have a regular dodecagonal shape as a whole. In this case, deterioration in the performance of the coil unit 5 due to the presence of the gap 50 can be more effectively suppressed.
• the first shield member 30 is formed with a gap 50 that extends linearly between the adjacent shield pieces 30P.
• the gap 50 crosses at least a portion of the first intermediate straight portion group 161G or at least a portion of the second intermediate straight portion group 171G when viewed in the axial direction.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the gap 50 and the at least part of the first intermediate straight portion group 161G or the second intermediate straight portion group is 80° to 100°.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be effectively suppressed. can.
• the gap and the at least part of the first intermediate straight portion group 161G or the second intermediate straight portion group 171G are perpendicular to at least a portion of the above.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed. be able to.
• the first shield member 30 is formed with a gap 50 that extends linearly between the adjacent shield pieces 30P.
• the gap 50 crosses at least a portion of the coil elements 10i; 10j, 10jj, seen in the axial direction. Viewed in the axial direction, the gap 50 intersects at least part of the plurality of turns 101-108; 101-105; 101-107 forming the coil elements 10i; 10j, 10jj.
• the gap 50 when viewed in the axial direction, the points where the gap 50 and the turn portions 101 to 108; 101 to 105; 101 to 107 intersect , the gap 50 is perpendicular to the tangents TL1 to TL4 of the turn portions 101 to 108; 101 to 105; 101 to 107 or the turn portions 101 to 108; 101 to 105; 101 to 107.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed. be able to.
• the coil unit 5 further includes a first connection terminal 46 connected to the coil 10.
• the coil 10 has an inner end 10e1 close to the central axis C and an outer end 10e2 far from the central axis C.
• the first connection terminal 46 is connected to the inner end portion 10e1 and extends from the inside of the coil 10 to the outside.
• a gap 50 is formed in the first shield member 30 and extends linearly between adjacent shield pieces 30P. Gap 50 extends from the inside of coil 10 to the outside.
• the first connection terminal 46 extends within the gap 50 or within the notch N formed in the small shield piece 30P. In this case, loss (heat generation) of the small shield piece 30P can be suppressed.
• the first connection terminal 46 is located inside the coil 10 at a height position overlapping with the shield piece 30P in a side view of the coil unit 5. It extends outward from the front.
• the coil elements 10i; 10j, 10jj include a plurality of turn portions 101 to 108; 101 to 105; has.
• the angle formed by the tangents TL1 to TL4 of the turn portions 101 to 107 or the turn portions 101 to 108; 101 to 105; 101 to 107 is 80° to 100°.
• the first connection terminal 46 and each of the turn portions 101 to 108; 101 to 105; 101 to 107 are At the intersection point, the first connection terminal 46 is perpendicular to the tangents TL1 to TL4 of the turn portions 101 to 108; 101 to 105; 101 to 107 or the turn portions 101 to 108; 101 to 105; There is.
• the coil elements 10i; 10j, 10jj include the linear portion groups 11G to 14G; 11G to 13G; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; 11G to 14G, 161G to 164G, and 171G to 174G.
• the straight line portion groups 11G to 14G; 11G to 13G; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; 11G to 14G, 161G to 164G, and 171G to 174G are arranged in the radial direction and extend in the same direction.
• the first connection terminal 46 has straight portion groups 11G to 14G; 11G to 13G; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; 174G.
• the angle formed by any one of 11G ⁇ 14G, 161G ⁇ 164G, and 171G ⁇ 174G is 80° ⁇ 100°.
• the first connection terminal 46 when viewed in the axial direction, has the straight portion groups 11G to 14G; 11G to 13G; 11G to 14G; ⁇ 164G; orthogonal to any of 11G to 13G, 161G to 164G; 11G to 14G, 161G to 164G, and 171G to 174G.
• the coil elements 10i; 10j, 10jj further include curved portion groups 151G to 154G.
• the curved portion groups 151G to 154G are composed of a plurality of curved portions 151 to 154 arranged in the radial direction and extending parallel to each other.
• the first connection terminal 46 intersects with any one of the curved portion groups 151G to 154G. In this case, it is possible to more effectively suppress an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 or notch N in which the first connection terminal 46 extends in the first shield member 30. Deterioration in the performance of the coil unit 5 due to the presence of the notch N can be further effectively suppressed.
• the first connection terminal 46 and any of the tangents TL1 to TL4 of the curved portion groups 151G to 154G are The angle formed is 80° to 100°. In this case, it is possible to effectively suppress an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 or notch N in which the first connection terminal 46 extends in the first shield member 30, and Deterioration in the performance of the coil unit 5 due to the presence of N can be effectively suppressed.
• the first connection terminal 46 when viewed in the axial direction, is connected to any one of the tangents TL1 to TL4 of the curved portion groups 151G to 154G. Orthogonal. In this case, it is possible to more effectively suppress an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 or notch N in which the first connection terminal 46 extends in the first shield member 30. Deterioration in the performance of the coil unit 5 due to the presence of the notch N can be further effectively suppressed.
• the point where the first connection terminal 46 and the outer peripheral edge of the first shield member 30 overlap when seen in the axial direction is the first point.
• it be point IP1.
• a point where the second connection terminal 47 connected to the outer end 10e2 of the coil element 10i and the outer peripheral edge of the first shield member 30 overlap is a second point IP2.
• the angle ⁇ formed by the first imaginary line IL1 connecting the first point IP1 and the central axis C and the second imaginary line IL2 connecting the second point IP2 and the central axis C is 90 ° or less. In this case, it is easy to route the wiring connected to the first connection terminal 46 and the second connection terminal 47.
• the angle ⁇ formed by the first imaginary line IL1 and the second imaginary line IL2 is 45° or less.
• the wiring connected to the first connection terminal 46 and the second connection terminal 47 can be routed even more easily.
• the point where the first connection terminal 46 and the outer peripheral edge of the first shield member 30 overlap when seen in the axial direction is the first point.
• it be point IP1.
• a point where the second connection terminal 47 connected to the outer end 10e2 of the coil element 10i and the outer peripheral edge of the first shield member 30 overlap is a second point IP2.
• the distance between the first point IP1 and the second point IP2 is 100 mm or less. In this case, it is easy to route the wiring connected to the first connection terminal 46 and the second connection terminal 47.
• the distance between the first point IP1 and the second point IP2 is 50 mm or less.
• the wiring connected to the first connection terminal 46 and the second connection terminal 47 can be routed even more easily.
• the coil unit 5 according to the first embodiment and its modifications described above further includes a second connection terminal 47 connected to the coil 10.
• the second shield member 40 has a rectangular shape when viewed in the axial direction.
• the first connection terminal 46 and the second connection terminal 47 extend from the same side of the second shield member 40. In this case, it is easy to route the wiring connected to the first connection terminal 46 and the second connection terminal 47.
• the coil element 10i has a central axis line in the first circumferential direction CD from the outer end 10e2 to the inner end 10e1. It is orbiting around C.
• the outer end 10e2 is offset from the inner end 10e1 in the first circumferential direction CD.
• the outer end region of the coil element 10i in the example shown in FIG. 5B, the fourth straight portion 14 of the eighth turn portion
• the first connection terminal 46 are not crossed. It is easy to pull out the first connection terminal 46 to the outside of the coil 10 so that the first point IP1 and the second point IP2 approach each other. Since the outer end region of the coil element 10i and the first connection terminal 46 do not intersect, the loss (heat generation) of the coil unit 5 can be reduced.
• the coil element 10i includes a first turn section 101, a second turn section 102, and a third turn section 103.
• the first turn portion 101 includes an inner end portion 10e1.
• the second turn portion 102 is adjacent to the first turn portion 101 in the radial direction and is disposed radially outward than the first turn portion 101 .
• the third turn portion 103 is adjacent to the second turn portion 102 in the radial direction and is disposed radially outward than the second turn portion 102 .
• the distance between the inner end portion 10e1 and the second turn portion 102 is greater than the distance between the second turn portion 102 and the third turn portion 103. In this case, loss (heat generation) of the coil unit 5 can be suppressed.
• the coil unit 5 includes a coil 10.
• the coil 10 includes coil elements 10i; 10j, 10jj formed in a spiral shape around an arbitrary central axis C. When viewed in the axial direction, the coil elements 10i; 10j, 10jj have an octagonal shape as a whole. In this case, the performance of the coil unit 5 can be improved.
• the coil elements 10i; 10j, 10jj extend along seven sides of the eight sides of the octagon. It includes seven straight line portion groups 11G to 13G and 161G to 164G. The angles formed by the adjacent straight line portion groups 11G to 13G and 161G to 164G are 125° to 145°. In this case, the performance of the coil unit 5 can be effectively improved.
• the angle formed by the adjacent linear portion groups 11G to 13G and 161G to 164G is 135°. In this case, the performance of the coil unit 5 can be effectively improved.
• the coil elements 10i; 10j, 10jj have a regular octagonal shape as a whole.
• the coil elements 10i; 10j, 10jj include seven linear portion groups 11G to 13G, 161G to 164G extending along seven of the eight sides of the regular octagon. In this case, the performance of the coil unit 5 can be effectively improved.
• the coil unit 5 includes a coil 10.
• the coil 10 includes coil elements 10i; 10j, 10jj formed in a spiral shape around an arbitrary central axis C. When viewed in the axial direction, the coil elements 10i; 10j, 10jj have a dodecagonal shape as a whole. In this case, the performance of the coil unit 5 can be improved.
• the coil elements 10i; 10j, 10jj are arranged along 11 sides of the 12 sides of the dodecagon. It includes eleven extending linear portion groups 11G to 13G, 161G to 164G, and 171G to 174G.
• the angles formed by the adjacent straight line portion groups 11G to 13G, 161G to 164G, and 171G to 174G are 140° to 160°. In this case, the performance of the coil unit 5 can be effectively improved.
• the angle formed by the adjacent linear portion groups 11G to 13G, 161G to 164G, and 171G to 174G is 150°. be. In this case, the performance of the coil unit 5 can be effectively improved.
• the coil elements 10i; 10j, 10jj have a regular dodecagonal shape as a whole.
• the coil elements 10i; 10j, 10jj include 11 linear portion groups 11G to 13G, 161G to 164G, and 171G to 174G extending along 11 of the 12 sides of the regular dodecagon. .
• the performance of the coil unit 5 can be effectively improved.
• the coil unit 5 includes a first shield member 30.
• the first shield member 30 is divided into a plurality of shield pieces 30P.
• a gap 50 is formed in the first shield member 30 and extends linearly between adjacent shield pieces 30P.
• the coil elements 10i; 10j, 10jj include straight portion groups 11G to 14G; 11G to 13G; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; The straight line portion groups 11G to 14G; 11G to 13G; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; 11G to 14G, 161G to 164G, and 171G to 174G are arranged in the radial direction and extend in the same direction. It consists of a plurality of straight parts 11-14; 11-13; 11-14, 161-164; 11-13, 161-164; 11-14, 161-164, 171-174.
• the gap 50 is defined by any of the linear portion groups 11G to 14G; 11G to 13G; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; ⁇ 174G.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 formed in the first shield member 30 can be effectively suppressed. Therefore, the dimensions of the coil unit 5 can be effectively reduced while suppressing an increase in the loss of the coil unit 5.
• the angle formed by at least a portion of 11G to 14G, 161G to 164G, and 171G to 174G is 80° to 100°.
• the gap 50 when viewed in the axial direction, is one of the linear portion groups 11G to 14G; 11G to 13G; ; 11G to 14G, 161G to 164G; 11G to 13G, 161G to 164G; 11G to 14G, 161G to 164G, and orthogonal to at least a portion of 171G to 174G.
• an increase in loss (heat generation) of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed, and a decrease in performance of the coil unit 5 due to the presence of the gap 50 can be further effectively suppressed. be able to.
• the power transmitting device 1 and/or the power receiving device 2 include the coil unit 5 described above.
• the power transmission system S includes a power transmission device 1 and a power reception device 2. At least one of the power transmitting device 1 and the power receiving device 2 includes the coil unit 5 described above.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Computer Networks & Wireless Communication (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Coils Of Transformers For General Uses (AREA)
• Coils Or Transformers For Communication (AREA)
• Regulation Of General Use Transformers (AREA)
• Charge And Discharge Circuits For Batteries Or The Like (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=87654774

Family Applications (1)

Country Status (5)

Cited By (1)

Citations (9)

Family Cites Families (6)

• 2022
  • 2022-11-08 JP JP2022179022A patent/JP7330348B1/ja active Active
• 2023
  • 2023-06-30 JP JP2024521221A patent/JPWO2024005200A1/ja active Pending
  • 2023-06-30 WO PCT/JP2023/024473 patent/WO2024005200A1/ja not_active Ceased
  • 2023-06-30 EP EP23831639.2A patent/EP4550370A4/en active Pending
  • 2023-06-30 CN CN202380050191.XA patent/CN119452441A/zh active Pending
  • 2023-06-30 US US18/880,013 patent/US20260011488A1/en active Pending
• 2025
  • 2025-05-01 JP JP2025076384A patent/JP2025114686A/ja active Pending

Patent Citations (9)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events