WO2022239561A1 - コイル及び回転機 - Google Patents
コイル及び回転機 Download PDFInfo
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- WO2022239561A1 WO2022239561A1 PCT/JP2022/016022 JP2022016022W WO2022239561A1 WO 2022239561 A1 WO2022239561 A1 WO 2022239561A1 JP 2022016022 W JP2022016022 W JP 2022016022W WO 2022239561 A1 WO2022239561 A1 WO 2022239561A1
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- coil
- outer peripheral
- peripheral surface
- layer
- coil layer
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 147
- 239000004020 conductor Substances 0.000 claims abstract description 98
- 238000004804 winding Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 14
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- 238000000034 method Methods 0.000 description 33
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 22
- 238000003825 pressing Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
Definitions
- the present invention relates to coils and rotating machines such as motors and generators.
- Patent Document 1 discloses a winding structure.
- the winding structure uses a wire having a rectangular cross-sectional shape.
- the rectangular wire rod has a rectangular cross section.
- the winding structure arranges a plurality of winding layers in close contact with each other in the thickness direction.
- the thickness direction of the wound layer portion is the long side direction of the cross section of the wire having the rectangular cross section.
- a space is formed inside the winding structure.
- a support is inserted into this space and the winding structure is attached to this support.
- the wound layer portion is formed by deforming a wire rod having a rectangular cross section so as to be curved at right angles to the short side direction of the cross section, and overlapping them in a spiral shape.
- “Spiral shape” is a state in which one wire rod is laminated so as to be overlapped while winding.
- “Spiral” is a state in which one wire rod is not laminated while being wound, but shifted in the thickness direction of the wound layer.
- the wound layer portion may be curved in the long side direction of the cross section of the wire and overlapped in a spiral shape.
- the winding layer part consists of a plurality of winding parts.
- the winding portion has a rectangular shape with rounded corners when viewed from the thickness direction of the wound layer portion by bending and deforming the wire rod in four perpendicular directions.
- a corner portion of the winding portion is formed into a curved portion having a predetermined curvature.
- the side portions of the peripheral portion are formed linearly and include a pair of long side portions and a pair of short side portions. The curvature of the curved portion that becomes the corner gradually decreases from the inner circumferential portion toward the outer circumferential portion.
- the plurality of winding portions are overlapped so that the wire is in close contact with the entire circumference.
- the winding structure includes a first winding layer portion and a second winding layer portion as winding layer portions.
- the first wound layer portions and the second wound layer portions are alternately arranged.
- the first winding layer portion is formed by spirally overlapping a wire rod from the outer peripheral side to the inner peripheral side.
- the first winding layer transitions to the second winding layer by the first connecting portion.
- the first connecting portion is formed by a wire continuous from the inner peripheral side of the first wound layer portion.
- the second wound layer portion is formed by spirally overlapping a wire rod from the inner peripheral side to the outer peripheral side.
- the second wound layer transitions to the next first wound layer by the second connecting portion.
- the second connecting portion is formed by a wire continuous from the outer peripheral side of the second wound layer portion.
- the first wound layer portion and the second wound layer portion are closely arranged.
- the wire is helically deformed by repeating two consecutive first deformation regions and second deformation regions.
- the first deformation area corresponds to the first wound layer portion. In the first deformation area, the wire spirally loops from the outside toward the inside. The curvature of the curved portion in the first deformation area increases toward the inside.
- the second deformation area corresponds to the second wound layer portion. In the second deformation area, the wire is spirally wound from the inside to the outside. The curvature of the curved portion in the second deformation area becomes smaller toward the outside.
- the third deformation location on the side of the second deformation region collides with the first deformation location of the first deformation region.
- the second wound layer portion can be formed adjacent to the first wound layer portion.
- the sixth deformation point on the side of the first deformation area collides with the fourth deformation point of the second deformation area.
- the first wound layer portion can be formed adjacent to the second wound layer portion.
- the forming device spirally deforms the wire.
- the molding device includes a conveying mechanism and a deformation mechanism.
- the transport mechanism has a driving roller and a driven roller.
- the drive roller conveys the wire along the longitudinal direction.
- the driven roller is arranged to face the driving roller.
- the deformation mechanism has a pressing roller, a fulcrum roller and a pressing roller.
- the pressing roller bends and deforms the wire.
- the fulcrum roller is arranged to face the pressing roller.
- the pressing roller is arranged upstream of the fulcrum roller in the conveying direction.
- the wire is sandwiched between the drive roller and the driven roller, and conveyed while being straightened in the longitudinal direction.
- the wire passes between the pressing roller and the fulcrum roller while contacting the pressing roller.
- the pressing roller approaches and separates from the fulcrum roller to perform a pressing operation.
- the forming device alternately performs the first deformation process and the second deformation process while continuously conveying the wire rod.
- the first deformation step corresponds to the first deformation area.
- the wire rod is conveyed by the length of the long side portion corresponding to the outermost circumference side, and then a curved portion having a predetermined curvature is formed by the pushing operation of the pushing roller.
- the wire rod is conveyed by the length of the short side portion, and then a curved portion having a predetermined curvature is formed by the pressing operation of the pressing roller.
- deformation processing for forming long side portions, curved portions, short side portions and curved portions is repeatedly performed.
- the wire is deformed so as to spirally loop from the outside toward the inside. Furthermore, in the first deformation step, the curvature of the inner curved portion is deformed so as to be larger than the curvature of the adjacent outer curved portion.
- the second deformation process corresponds to the second deformation area.
- the wire rod is conveyed by a length corresponding to the first connecting portion.
- a curved portion is formed by a pushing operation with a pushing roller.
- the wire rod is conveyed by the length of the long side portion corresponding to the innermost peripheral side, and then a curved portion having a predetermined curvature is formed by the pressing operation of the pressing roller.
- the wire rod is conveyed by the length of the short side portion, and then a curved portion having a predetermined curvature is formed by a pushing operation of the pushing roller.
- the second deformation step a deformation process for forming long side portions, curved portions, short side portions and curved portions is repeatedly performed.
- the wire is deformed so as to spirally loop from the inside toward the outside.
- the curvature of the outer curved portion is deformed so as to be smaller than the curvature of the adjacent inner curved portion.
- the wire rod is conveyed by the length corresponding to the second connecting portion.
- Patent Document 2 discloses a method for manufacturing a stator.
- a stator is provided in the motor.
- the manufacturing method includes molding, arranging, arranging and assembling steps.
- the molding process forms an air core coil.
- the processing unit bends the coil wire into a designed shape.
- the processing section includes a conveying section and a deformation section.
- the conveying section sandwiches the coil wire between the two drive rolls and feeds it out from the supplying section.
- the conveying unit conveys the coil wire to the deforming unit while straightening the coil wire in the longitudinal direction.
- the deformation section comprises a pressure roll, a support roll and a push roll.
- the support roll is arranged on one side of the conveying path of the coil wire.
- the pressing roll is arranged on the other side of the conveying path of the coil wire and moves in a direction intersecting the conveying path.
- the deforming portion deforms the coil wire into a desired curvature by pushing the coil wire with the pushing roll.
- the coil wire passes through the deformed portion and becomes a compact.
- the compact evolves spirally.
- the molded body forms a coil unit in the molding process.
- the coil unit sequentially arranges a required number of coils and crossover wires.
- the stator is a 3-phase 12-core stator
- the coil unit includes 4 concentrated winding coils and 5 crossover wires. In the coil, straight and curved sections are formed alternately.
- the crossover wire goes around the central axis of the coil.
- the crossover wire has a length necessary to connect the coils of the same phase with the coils arranged.
- U-phase, V-phase and W-phase coil units are prepared.
- the coils of the U-phase, V-phase and W-phase coil units are arranged in one line in the following manner.
- the crossover wires do not cross each other.
- the arranging step and the arranging step obtain an arranging coil group. In the arranged coil group, all the coils of the U-phase, V-phase and W-phase coil units are fitted to the coil support.
- the U-phase crossover wire is positioned between the W-phase crossover wire and the V-phase crossover wire
- the V-phase crossover wire is positioned between the U-phase crossover wire and the W-phase crossover wire.
- the W-phase crossover is located between the V-phase crossover and the U-phase crossover.
- the split stator cores provided with insulating members are brought into contact with the end faces of the coil support, and the coils of the arranged coil group are attached to the split stator cores.
- the attachment of the coils to the split stator cores is repeated, and all the coils are attached to the plurality of split stator cores.
- the assembly process obtains a straight stator.
- the assembly process is to fix the linear stator into an annular shape to obtain an annular stator.
- Patent Document 3 discloses a winding manufacturing method and manufacturing apparatus.
- a manufacturing method and a manufacturing apparatus helically deform a wire to form a compact.
- the compact is compressed to form a winding.
- the winding becomes a coil.
- the rotating machine has a coil with the following structure.
- the aforementioned structure is formed by concentrating the winding of the conductor.
- coils are formed by intensive winding of conductors around teeth of a stator core.
- a rectangular conductor may be adopted as a conductor forming a coil.
- a rectangular conductor has a rectangular cross-sectional shape in a material state before winding. Forming the coil from a rectangular conductor may improve the space factor. By improving the space factor, it is possible to achieve high efficiency of the rotating machine.
- the rectangular conductor When the rectangular conductor is spirally wound so as to correspond to the outer peripheral shape of the teeth, the rectangular conductor is formed with corners.
- the corner connects the rectangular conductor portion along the side surface of the tooth and the rectangular conductor portion along the end face of the tooth.
- the inventors know that a rectangular conductor expands longitudinally on the outer circumference of the corner and contracts longitudinally on the inner circumference of the corner.
- the inventors know that such deformation causes the rectangular conductors forming the corners to be in a state where the rectangular cross-sectional shape is deformed into the following mode.
- the aforementioned embodiment is trapezoidal with the inner side longer than the outer side.
- the aforementioned aspect includes the third coil layer and the fourth coil layer formed by winding one continuous rectangular conductor.
- the third coil layer and the fourth coil layer are connected by one rectangular conductor described above.
- the fourth coil layer is in contact with the second side of the third coil layer on the first side of the fourth coil layer.
- the first side of the fourth coil layer forms the first side of the second direction perpendicular to the first direction following the fourth coil layer
- the second side of the third coil layer forms the second side of the third coil layer in the second direction.
- forming the second side of The first direction is a radial direction in which the rectangular conductors overlap in the third coil layer and the fourth coil layer.
- the positions of the wound rectangular conductors in the first direction are the same in the third coil layer and the fourth coil layer.
- the next two parts contact in the second direction on the inner peripheral side and do not contact in the second direction on the outer peripheral side.
- the above-mentioned two parts are the rectangular conductor part which forms the corner of the third coil layer and has a trapezoidal cross-sectional shape, and the corner of the fourth coil layer which has a trapezoidal cross-sectional shape. It is the deformed rectangular conductor portion. That is, a gap is generated on the outer peripheral side of these two portions.
- the inventor thought that the coil could be made smaller in the second direction if the occurrence of the above-described gaps could be suppressed in the coil. It is possible to employ a rectangular conductor having a large dimension in the second direction. Furthermore, the inventor thought that it might be possible to improve the space factor. Assume that the following spaces are the same when the coil is attached to the predetermined part. In this case, by downsizing the coil in the second direction, there is a possibility that more rectangular conductors can be accommodated in this space.
- the aforementioned space accommodates a rectangular conductor forming a coil. Taking a rotating machine as an example, this space is called a slot. Slots are formed between adjacent teeth in the stator core.
- a coil that is miniaturized in the second direction in this way can be employed in a transformer as well as a rotating machine.
- An object of the present invention is to provide a technique capable of downsizing the coil in the second direction in which the coil layers of the coil using flat conductors are in contact with each other.
- One aspect of the present invention is a first coil layer formed by spirally winding a rectangular conductor, and a second coil layer connected to the first coil layer by the rectangular conductor and formed by spirally winding the rectangular conductor. and wherein the second coil layer is on the first side in the second direction orthogonal to the radial first direction in which the rectangular conductors overlap in the first coil layer and the second coil layer of the second coil layer. is in contact with a second side surface of the first coil layer on the second side in the second direction, and the first coil layer is continuous with the first portion and the first portion and has the inner peripheral surface of the second coil layer.
- the second coil layer includes a third portion; and a fourth portion continuous with the third portion and in contact with the outer peripheral surface of the third portion at an inner peripheral surface.
- the third portion is adjacent to the first portion and the second portion in the second direction in a contact state in which the first side surface and the second side surface are in contact
- the fourth portion is , in the contact state, adjacent to the second portion in the second direction without being adjacent to the first portion in the second direction, and the outer peripheral surface of the third portion, in the contact state, It is disposed on the outer peripheral side in the first direction from the outer peripheral surface and on the inner peripheral side in the first direction than the outer peripheral surface of the second portion, and the outer peripheral surface of the fourth portion is in the contact state with the second portion.
- the coil is arranged on the outer peripheral side in the first direction from the outer peripheral surface of the.
- the outer peripheral surface of the third portion is located on the outer peripheral side in the first axial direction as the first direction from the outer peripheral surface of the first portion and in the first axial direction from the outer peripheral surface of the second portion.
- the outer peripheral surface of the fourth portion may be arranged on the inner peripheral side, and in the contact state, the outer peripheral surface of the fourth portion may be arranged on the outer peripheral side in the first axial direction than the outer peripheral surface of the second portion.
- the outer peripheral surface of the third portion is on the outer peripheral side of the second axial direction as the first direction orthogonal to the first axial direction from the outer peripheral surface of the first portion and the outer periphery of the second portion. and the outer peripheral surface of the fourth portion is arranged on the outer peripheral side in the second axial direction of the outer peripheral surface of the second portion in the contact state, You may do so.
- Another aspect of the present invention includes a rotor and a stator, wherein the stator is formed by stacking any one of the coils described above and steel plates, and a yoke and a yoke toward the rotor from the yoke. and a stator core including teeth protruding in the second direction, wherein the coils are provided on the teeth.
- the first coil layer and the second coil layer can be brought into close contact in the second direction.
- the coil can be miniaturized in the second direction.
- the coil can be miniaturized in the second direction in which the coil layers of the coil using the rectangular conductor are in contact with each other.
- FIG. 4 is a perspective view showing an example of a schematic configuration of yoke pieces, teeth, coils, and slot insulating paper;
- the upper row shows teeth, coils and slot insulating paper alone.
- the middle row shows a state in which the coil is attached to the teeth through the slot insulating paper.
- the lower row shows the yoke piece alone.
- FIG. 4 shows a state in which four teeth, to which coils are attached via slot insulating paper, are assembled into one yoke piece.
- FIG. 4 is a connection diagram showing an example of a connection mode of a plurality of coils; It is a partial perspective view which shows an example of schematic structure of a coil. The corners of the coil are shown.
- FIG. 7 is a cross-sectional view taken along the Z arrow in FIG. 6; 4A and 4B are cross-sectional views for comparing the arrangement states of rectangular conductors at the corners of a coil; The cutting position corresponds to line II in FIG.
- the upper row corresponds to the coil of the embodiment.
- the lower row corresponds to the coil of the comparative example.
- a motor 10 as a rotating machine will be described with reference to FIGS.
- the motor 10 is mounted on various products.
- the motor 10 is used as a drive source for an electric vehicle.
- Examples of electric vehicles include electric cars, electric bicycles, electric wheelchairs, electric carts and electric food carts.
- Electric vehicles include hybrid vehicles.
- the motor 10 includes a rotor 20 and a stator 30 (see FIGS. 1 and 2).
- the motor 10 is an internal rotation type brushless motor.
- the rotor 20 includes a rotor core 21 , multiple permanent magnets, and a shaft 22 . 1 and 2, illustration of permanent magnets is omitted.
- the rotor core 21 is formed by stacking the stamped steel sheets while stamping the steel sheets with a press machine. An electromagnetic steel sheet is employed as the steel sheet.
- a plurality of permanent magnets are provided in the rotor core 21 .
- a plurality of permanent magnets are housed in a plurality of spaces formed in the rotor core 21, respectively.
- the motor 10 is called an IPM (Interior Permanent Magnet) motor.
- a plurality of permanent magnets may be provided on the outer peripheral surface of rotor core 21 .
- the motor 10 is called an SPM (Surface Permanent Magnet) motor.
- the shaft 22 is fixed to a through hole formed in the center of the rotor core 21 .
- Bearings are attached to the shaft 22 on both sides of the rotor core 21 .
- the bearing is supported by the support.
- the support portion is provided on the stator 30 or provided on a housing that supports the stator 30 .
- FIGS. 1 and 2 the illustration of the bearing, the support and the housing is omitted.
- the shaft 22 serves as the rotating shaft of the rotor 20 .
- Rotor 20 rotates around shaft 22 .
- the rotor 20 is similar to a rotor provided in a known motor (rotating machine). Therefore, other description of the rotor 20 is omitted.
- the circumferential direction around the shaft 22 is called “circumferential direction”.
- a circumferential direction includes a rotational direction and a counter-rotational direction.
- the rotor 20 rotates in the direction of rotation.
- the next arrow shown in the lower part of FIG. 1 and FIG. 2 indicates the direction of rotation.
- the aforementioned arrows are circular arc arrows shown above the rotor 20 in the lower part of FIG. 1, and circular arc arrows shown inside the rotor 20 in FIG.
- the counter-rotational direction is opposite to the rotational direction.
- a radial direction about the shaft 22 (rotational axis of the rotor 20) is referred to as a “radial direction”.
- the stator 30 includes a stator core 31 and a plurality of coils 40 (see FIGS. 1 and 2). Further, the stator 30 has an insulating member 60 (see FIGS. 3 and 4). 1 and 2, illustration of the insulating member 60 is omitted.
- Stator core 31 includes a yoke 32 and a plurality of teeth 35 (see FIG. 2). In the internal rotation type motor 10 , the plurality of teeth 35 protrude radially inward from the inner circumference of the yoke 32 .
- the same number of slots 36 as the teeth 35 are formed in the stator core 31 .
- a slot 36 is a space formed between adjacent teeth 35 .
- the number of slots in the stator 30 is appropriately determined in consideration of the following points. An example of the aforementioned points is the performance required of the motor 10 .
- the stator core 31 has a form in which it is divided into a yoke 32 and a plurality of teeth 35 (see FIG. 3).
- the number of teeth 35 is twelve (see FIG. 2). In this case, the number of slots is twelve.
- 12 teeth 35 are provided at regular angular intervals.
- the yoke 32 has a form divided equally into three yoke pieces 33 (see FIGS. 2 to 4). Four teeth 35 are provided on one yoke piece 33 (see FIG. 4).
- the stator core 31 is formed by attaching four teeth 35 to one yoke piece 33 and assembling the three yoke pieces 33 into a ring shape (see FIGS. 1 to 4).
- the number of teeth 35, the number of divisions of the annular yoke 32, and the number of teeth 35 for one yoke piece 33 may differ from those in the embodiment. These numbers in the embodiment are examples.
- the yoke piece 33 includes a mounting groove 34 (see FIGS. 3 and 4).
- the mounting grooves 34 are provided radially inside where the teeth 35 are provided.
- the radially outer ends of the teeth 35 are fitted into the mounting grooves 34 .
- the yoke piece 33 may be provided with the first engaging portion on the inner surface of the mounting groove 34
- the tooth 35 may be provided with the second engaging portion on the radially outer end.
- the second engaging portion engages with the first engaging portion. That is, the tooth 35 is mounted on the yoke piece 33 in a state where the radial outer end thereof is engaged with the inner surface of the mounting groove 34 .
- illustration of the first engaging portion and the second engaging portion is omitted.
- the yoke pieces 33 and the teeth 35 are formed by stacking the punched steel plates while punching the steel plates with a press machine.
- An electromagnetic steel sheet is employed as the steel sheet.
- the direction in which the steel plates are laminated on the yoke pieces 33 and the teeth 35 is called "laminating direction".
- the lamination direction can also be said to be the direction in which steel plates are laminated in the stator core 31 .
- the stacking direction coincides with the direction in which the steel plates are stacked in the rotor core 21 .
- the yoke piece 33 includes the first engaging portion on the inner surface of the mounting groove 34 and the tooth 35 includes the second engaging portion on the radially outer end.
- the teeth 35 may be attached to the yoke pieces 33 from one side in the stacking direction.
- the coil 40 is formed by a rectangular conductor.
- a plurality of coils 40 are formed of the same rectangular conductor and have a similar coil structure (see FIGS. 1, 2 and 4).
- the coil structure adopted by the plurality of coils 40 is the same as the winding structure disclosed in Patent Document 1 described above, except that the coils 40 adopt a zigzag structure (see later-described FIGS. 6, 7, and upper part of FIG. 8). It is the same.
- the zigzag structure will be described later in the description of the coil structure of the coil 40, which will be described later.
- the coil structure of the coil 40 including the staggered structure is simply referred to as "coil structure".
- the coil 40 is provided on the tooth 35 via an insulating member 60 (see FIGS. 3 and 4).
- the insulating member 60 has electrical insulation and electrically insulates the tooth 35 and the coil 40 . That is, the plurality of coils 40 in the stator 30 are electrically insulated from the stator core 31 by the insulating member 60 .
- the insulating members 60 are provided on both sides of the teeth 35 in the circumferential direction within the slots 36 .
- the insulating member 60 is referred to as slot insulating paper.
- the slot insulating paper is also employed in the stator of a known motor (rotating machine).
- the stator 30 may employ an insulating structure including an insulator that is employed in known stators.
- the insulator may be a resin molded product.
- the stator 30 can employ an insulating structure including insulating members similar to those of known stators.
- the stator 30 may employ an insulation structure that includes both slot insulation paper and insulators. Therefore, further explanation regarding the following points will be omitted.
- the foregoing points relate to the insulating member 60 .
- the above points relate to the electrical insulation structure between the stator core 31 and the coils 40 using the insulating member 60 .
- Examples of winding methods for forming the coil 40 include the methods disclosed in Patent Documents 1 and 3 mentioned above. This method forms a coil while helically deforming a wire. That is, the coil 40 of the embodiment can be manufactured by a winding method according to the methods disclosed therein, using a winding device similar to that of Patent Documents 1 and 3. Therefore, the description of the method of winding the coil 40 will be omitted as appropriate.
- the plurality of coils 40 are classified into any of U-phase, V-phase and W-phase (see FIG. 5).
- the U-phase coil 40 is called “coil 40U”
- the V-phase coil 40 is called “coil 40V”
- the W-phase coil 40 is called “coil 40W”.
- the coils 40U, 40V, and 40W are not distinguished or are collectively referred to, they are referred to as "coils 40".
- Rectangular conductors forming the coil 40 are pulled out from the winding start side and the winding end side of the coil 40 (see FIGS. 1 to 4).
- the portions of the rectangular conductors drawn out are referred to as "leader lines 41U, 41V, 41W" (see FIG. 5).
- the lead wire 41U is formed by a rectangular conductor that forms the coil 40U.
- the lead wire 41V is formed by a rectangular conductor that forms the coil 40V.
- the lead wire 41W is formed by a rectangular conductor that forms the coil 40W.
- lead lines 41U, 41V, and 41W are not distinguished or are collectively referred to, they are referred to as "lead lines 41".
- the radially outer leader line 41 of the two leader lines 41 is shown longer than the radially inner leader line 41 .
- a plurality of coils 40U are connected on the side of a predetermined one of the two lead wires 41U (see FIG. 5).
- the remaining one lead wire 41U of the two lead wires 41U is connected to the U-phase connection terminal 43U.
- the plurality of coils 40U form a U-phase coil unit 42U.
- the plurality of coils 40V are connected on the side of a predetermined one of the two lead wires 41V (see FIG. 5).
- the remaining one lead wire 41V of the two lead wires 41V is connected to the V-phase connection terminal 43V.
- a plurality of coils 40V form a V-phase coil unit 42V.
- the plurality of coils 40W are connected on the side of a predetermined one of the two lead wires 41W (see FIG. 5).
- the remaining one lead wire 41W of the two lead wires 41W is connected to the W-phase connection terminal 43W.
- the plurality of coils 40W form a W-phase coil unit 42W.
- connection terminals 43 when the coil units 42U, 42V, and 42W are not distinguished or collectively referred to, they are referred to as "coil units 42".
- connection terminals 43U, 43V, and 43W When the connection terminals 43U, 43V, and 43W are not distinguished or are collectively referred to, they are referred to as "connection terminals 43". Examples of the connection method for connecting the lead wire 41 and the connection terminal 43 include crimping and welding.
- the connection between the lead wire 41 and the connection terminal 43 may be made via the first connection conductor 44 (see FIG. 5).
- the first connecting conductor 44 may be made of a rectangular conductor that is separate from the lead wire 41 .
- the first connection conductor 44 is connected to the lead wire 41 and the connection terminal 43 to electrically connect them.
- An example of the next first connection method includes welding.
- the first connection method connects the lead wire 41 and the first connection conductor 44 .
- the following second connection method is the same as the connection between the lead wire 41 and the connection terminal 43 .
- the second connection method connects the connection terminal 43 and the first connection conductor 44 .
- the first connecting conductor 44 is preferably made of the same rectangular conductor as the coil 40 .
- the connection between the lead wire 41 and the connection terminal 43 may be as follows.
- the plurality of lead wires 41U are drawn out with the following lengths and directly connected to the connection terminals 43U.
- the plurality of lead wires 41V are drawn out with the following lengths and directly connected to the connection terminals 43V.
- the plurality of lead wires 41W are drawn out with the following lengths and directly connected to the connection terminals 43W. The aforementioned length is determined in consideration of the route to the connection terminal 43 in phase with the lead wire 41 .
- stator 30 In the stator 30, four coils 40 forming a coil unit 42 for one phase are connected in parallel, and the coil units 42U, 42V, 42W are star-connected (see FIG. 5). A black circle shown in the center of FIG. 5 indicates a neutral point.
- the parallel connection of the four in-phase coils 40 and the star connection of the coil units 42U, 42V, and 42W may be performed via a second connecting conductor 45 made of a rectangular conductor that is separate from the lead wire 41 (FIG. 5 reference).
- the second connecting conductor 45 is connected to the lead wires 41 of the four coils 40 in phase, and electrically connects the coil units 42U, 42V, 42W.
- the following third connection method is the same as the connection between the lead wire 41 and the first connection conductor 44 .
- a third connection method connects the lead wire 41 and the second connection conductor 45 .
- connection mode of the coil units 42U, 42V, and 42W does not have to be star connection.
- Delta connection is an example of a connection mode different from star connection.
- the connection mode of the coil units 42U, 42V, 42W is appropriately determined in consideration of various conditions. In FIGS. 1, 2 and 4, illustration of the first connecting conductor 44 and the second connecting conductor 45 is omitted.
- Coil 40 includes a plurality of coil layers 50 .
- coil 40 includes six coil layers 50 (see FIGS. 3 and 6).
- the number of coil layers 50 provided in the coil 40 may be 2 or more and 5 or less, or may be 7 or more.
- the number of coil layers 50 of the coil 40 is appropriately determined in consideration of various conditions.
- the six coil layers 50 are called "coil layers 51, 52, 53, 54, 55, 56".
- coil layers 51 , 52 , 53 , 54 , 55 and 56 are not distinguished or collectively referred to, they are referred to as “coil layers 50 ”.
- the coil layer 50 has a structure in which a rectangular conductor is spirally wound (see the upper part of FIG. 3).
- "Swirl” means “the shape of a spirally wound plane curve” (Kojien 7th Edition, Iwanami Shoten).
- the number of turns of the rectangular conductor may be different in some or all of the plurality of coil layers 50 (see FIGS. 1 to 4), or may be the same (see FIG. 6 and the upper part of FIG. 7, which will be described later).
- the number of turns of the rectangular conductors in the plurality of coil layers 50 is appropriately determined in consideration of various conditions.
- the radial direction in which the rectangular conductors overlap in the coil layers 51, 52, 53, 54, 55, 56 is called “first direction", and the direction perpendicular to the first direction is called “second direction".
- One side in the second direction is called the “first side” and the other side in the second direction is called the “second side”.
- the second direction may coincide with the radial direction in the state of the motor 10 (rotating machine).
- the second direction coincides with the radial direction.
- the state of the motor 10 (rotating machine) includes the state of the stator 30 .
- the state of the motor 10 (rotating machine) and the state of the stator 30 include the state in which the coils 40 are provided on the teeth 35 .
- the second side in the second direction is the radially outer side (see FIG. 3).
- the first side in the second direction is defined as the radially outer side
- the second side in the second direction is defined as the radially inner side.
- the coil layers 51, 52, 53, 54, 55, 56 are provided in this order from the first side to the second side in the second direction (see the upper part of FIG. 3 and FIG. 6).
- the side surfaces of the coil layers 51, 52, 53, 54, 55, 56 on the first side in the second direction are referred to as "first side surfaces", and the side surfaces of the coil layers 51, 52, 53, 54, 55, 56 in the second direction
- the side of the second side is referred to as the "second side”.
- the first side of the coil layer 50 means the first side of some or all of the coil layers 51 , 52 , 53 , 54 , 55 , 56 .
- the second side of the coil layer 50 means the second side of some or all of the coil layers 51 , 52 , 53 , 54 , 55 and 56 .
- first axial direction and “second axial direction” are defined as the radial first direction.
- the second axial direction is orthogonal to the first axial direction.
- the first axial direction coincides with the stacking direction
- the second axial direction is orthogonal to both the stacking direction and the radial direction.
- the coil layer 52 is connected to the coil layer 51 by a rectangular conductor on the inner peripheral side of the coil 40 .
- the coil layer 52 is in contact with the second side surface of the coil layer 51 on the first side surface (see the upper part of FIG. 3 and FIG. 6).
- the coil layer 53 is connected to the coil layer 52 by a rectangular conductor on the outer peripheral side of the coil 40 .
- the coil layer 53 contacts the second side surface of the coil layer 52 on the first side surface (see the upper part of FIG. 3 and FIG. 6).
- the coil layer 54 is connected to the coil layer 53 by a rectangular conductor on the inner peripheral side of the coil 40 .
- the coil layer 54 is in contact with the second side surface of the coil layer 53 on the first side surface (see the upper part of FIG. 3 and FIG. 6).
- the coil layer 55 is connected to the coil layer 54 by a rectangular conductor on the outer peripheral side of the coil 40 .
- the coil layer 55 is in contact with the second side surface of the coil layer 54 on the first side surface (see the upper part of FIG. 3 and FIG. 6).
- the coil layer 56 is connected to the coil layer 55 by a rectangular conductor on the inner peripheral side of the coil 40 .
- the coil layer 56 is in contact with the second side surface of the coil layer 55 on the first side surface (see the upper part of FIG. 3 and FIG. 6).
- illustration of the rectangular conductor connecting the two coil layers 50 is omitted except for the following part.
- the above-mentioned part is a rectangular conductor that connects the coil layers 51 and 52 and a rectangular conductor that connects the coil layers 53 and 54 (see “inner circumference side of the coil 40" in the upper part of FIG. 3).
- the arrangement of the rectangular conductors connecting the two coil layers 50 with respect to the coil 40 is appropriately determined in consideration of various conditions.
- the state in which the first side surface of the coil layer 52 and the second side surface of the coil layer 51 are in contact is referred to as a "contact state”.
- the portions of the coil layer 51 are called “first portion A” and “second portion B”, and the portions of the coil layer 52 are called “third portion C” and “fourth portion D” (Figs. reference).
- the first portion A forms the second layer of the coil layer 51 and the second portion B forms the third layer of the coil layer 51 .
- the third portion C forms the second layer of the coil layers 52 and the fourth portion D forms the third layer of the coil layers 52 .
- the first portion A, the second portion B, the third portion C, and the fourth portion D are illustrative examples.
- the four portions corresponding to the first portion A, the second portion B, the third portion C, and the fourth portion D satisfy the conditions described below. can be set arbitrarily.
- the second portion B is continuous with the first portion A and contacts the outer peripheral surface of the first portion A on the inner peripheral surface (see FIGS. 6, 7 and 8 upper).
- the first portion A is continuous with the second portion B and contacts the inner peripheral surface of the second portion B at the outer peripheral surface.
- the fourth portion D is continuous with the third portion C and contacts the outer peripheral surface of the third portion C on the inner peripheral surface (see FIGS. 6, 7 and 8 upper stage).
- the third portion C is continuous with the fourth portion D and contacts the inner peripheral surface of the fourth portion D at its outer peripheral surface.
- the third portion C is adjacent to the first portion A and the second portion B in the second direction in a contact state (see FIGS. 6, 7 and 8 upper).
- the outer peripheral surface of the third portion C is arranged on the outer peripheral side in the first direction from the outer peripheral surface of the first portion A and on the inner peripheral side in the first direction from the outer peripheral surface of the second portion B in a contact state. That is, the outer peripheral surface of the third portion C is arranged in the contact state on the outer peripheral side in the first axial direction from the outer peripheral surface of the first portion A and on the inner peripheral side in the first axial direction from the outer peripheral surface of the second portion B. (see Figure 6).
- the outer peripheral surface of the third portion C is arranged in a contact state on the outer peripheral side in the second axial direction from the outer peripheral surface of the first portion A and on the inner peripheral side in the second axial direction from the outer peripheral surface of the second portion B. (see Figure 7).
- the fourth portion D is not adjacent to the first portion A in the second direction, but is adjacent to the second portion B in the second direction (see FIGS. 6, 7 and upper part of FIG. 8).
- the outer peripheral surface of the fourth portion D is arranged on the outer peripheral side in the first direction from the outer peripheral surface of the second portion B in a contact state. That is, the outer peripheral surface of the fourth portion D is arranged on the outer peripheral side in the first axial direction from the outer peripheral surface of the second portion B in a contact state (see FIG. 6). Further, the outer peripheral surface of the fourth portion D is arranged on the outer peripheral side in the second axial direction from the outer peripheral surface of the second portion B in a contact state (see FIG. 7).
- the rectangular conductors of the next first coil layer are arranged to be displaced from the rectangular conductors of the next second coil layer in the first direction (zigzag structure; see FIGS. 6, 7 and upper part of FIG. 8).
- the first coil layer and the second coil layer of the coil 40 are two coil layers 50 adjacent to each other in the second direction among the coil layers 51 , 52 , 53 , 54 , 55 and 56 .
- the positional deviation in the first direction between the rectangular conductor of the first coil layer and the rectangular conductor of the second coil layer includes the positional deviation in the first axial direction and the positional deviation in the second axial direction (Fig. 6, 7).
- the coil 40 is formed according to the winding method disclosed in Patent Documents 1 and 3.
- the rectangular conductor has a predetermined shape. Only the amount sent is sent.
- the first axial portion E1 extends along the first axial direction with a first portion A, a second portion B, a third portion C and a fourth portion D.
- a second axial portion E2 extends along the second axial direction with a first portion A, a second portion B, a third portion C and a fourth portion D.
- the corner connects the first shaft portion E1 and the second shaft portion E2.
- the coil 40 includes a plurality of coil layers 50 (see upper part of FIG. 3 and FIG. 6).
- the coil layer 50 is formed by spirally winding a rectangular conductor.
- a plurality of coil layers 50 are connected by rectangular conductors.
- the rectangular conductors connecting the coil layers 50 are the same rectangular conductors as the coil layers 50 and are continuous with the rectangular conductors forming the coil layers 50 .
- the coil layer 52 of the plurality of coil layers 50 has a first side surface on the first side in the second direction
- the coil layer 51 of the plurality of coil layers 50 has a second side surface on the second side in the second direction. come into contact with
- the coil layer 51 includes a first portion A and a second portion B (see FIGS. 6, 7 and the upper part of FIG. 8).
- the second portion B is continuous with the first portion A and contacts the outer peripheral surface of the first portion A on the inner peripheral surface.
- the coil layer 52 includes a third portion C and a fourth portion D (see FIGS. 6, 7 and upper part of FIG. 8).
- the fourth portion D is continuous with the third portion C and contacts the outer peripheral surface of the third portion C on the inner peripheral surface.
- the third portion C is adjacent to the first portion A and the second portion B in the second direction in a contact state (see FIGS. 6, 7 and 8 upper).
- the fourth portion D is not adjacent to the first portion A in the second direction, but is adjacent to the second portion B in the second direction (see FIGS. 6, 7 and upper part of FIG. 8).
- the outer peripheral surface of the third portion C is arranged in a contact state on the outer peripheral side in the first direction from the outer peripheral surface of the first portion A and on the inner peripheral side in the first direction from the outer peripheral surface of the second portion B (FIG. 6 , 7 and the top of FIG. 8).
- the outer peripheral surface of the fourth portion D is arranged on the outer peripheral side in the first direction from the outer peripheral surface of the second portion B in a contact state (see FIGS. 6, 7 and upper part of FIG. 8).
- the outer peripheral surface of the third portion C is arranged in a contact state on the outer peripheral side in the first axial direction from the outer peripheral surface of the first portion A and on the inner peripheral side in the first axial direction from the outer peripheral surface of the second portion B ( See Figure 6).
- the outer peripheral surface of the fourth portion D is arranged on the outer peripheral side in the first axial direction from the outer peripheral surface of the second portion B in a contact state (see FIG. 6).
- the outer peripheral surface of the third portion C is arranged in a contact state on the outer peripheral side in the second axial direction from the outer peripheral surface of the first portion A and on the inner peripheral side in the second axial direction from the outer peripheral surface of the second portion B ( See Figure 7).
- the outer peripheral surface of the fourth portion D is arranged on the outer peripheral side in the second axial direction from the outer peripheral surface of the second portion B in a contact state (see FIG. 7).
- the first axial direction and the second axial direction are included in the radial first direction. That is, the first axial direction and the second axial direction are contained within a virtual plane containing the first direction. Furthermore, the second axial direction is orthogonal to the first axial direction.
- the rectangular conductor When the rectangular conductor is spirally wound so as to correspond to the outer peripheral shape of the teeth 35, as described above, the rectangular conductor has a corner formed at the portion connecting the first shaft portion E1 and the second shaft portion E2. (see Figure 6).
- the inventors know that a rectangular conductor expands longitudinally on the outer circumference of the corner and contracts longitudinally on the inner circumference of the corner.
- the inventors know that such deformation causes the rectangular conductor forming the corners to be deformed into the following state in cross section (see FIG. 8).
- the aforementioned embodiment is trapezoidal with the inner side longer than the outer side.
- Coil 70 is a comparative example for coil 40 of the embodiment.
- Coil 70 includes coil layers 71 , 72 , 73 , 74 , 75 , and 76 each formed by winding a single continuous rectangular conductor.
- the coil layers 71 , 72 , 73 , 74 , 75 , 76 are connected by one rectangular conductor as described above.
- the coil layers 71, 72, 73, 74, 75, 76 are provided in this order from the first side to the second side in the second direction (see the lower part of FIG. 8).
- the coil layer 72 contacts the second side surface of the coil layer 71 on the first side surface.
- the coil layer 73 is in contact with the second side of the coil layer 72 on the first side.
- the coil layer 74 is in contact with the second side of the coil layer 73 on the first side.
- the coil layer 75 is in contact with the second side of the coil layer 74 on the first side.
- the coil layer 76 is in contact with the second side of the coil layer 75 on the first side.
- the first side surfaces of the coil layers 71 , 72 , 73 , 74 , 75 , 76 are the first side surfaces of the coil layers 71 , 72 , 73 , 74 , 75 , 76 in the second direction, similar to the first side surface of the coil layer 50 .
- the second side surfaces of the coil layers 71 , 72 , 73 , 74 , 75 , 76 are the second side surfaces of the coil layers 71 , 72 , 73 , 74 , 75 , 76 in the second direction, similar to the second side surface of the coil layer 50 .
- the positions of the rectangular conductors in the first direction are the same. In this case, the next two portions contact in the second direction on the inner peripheral side and do not contact in the second direction on the outer peripheral side.
- the above-mentioned two parts are the rectangular conductor part which forms the corner of the third coil layer and has a trapezoidal cross-sectional shape, and the corner of the fourth coil layer which has a trapezoidal cross-sectional shape. It is the deformed rectangular conductor portion.
- the third coil layer and the fourth coil layer are two coil layers adjacent to each other in the second direction among the coil layers 71, 72, 73, 74, 75 and 76. That is, a gap S is generated on the outer peripheral side of these two portions (see the lower part of FIG. 8).
- the coil 40 it is possible to suppress the occurrence of the gap S that occurs at the corners of the coil 70 of the comparative example described above (see the upper part of FIG. 8). That is, in the coil 40, the coil layers 50 adjacent to each other in the second direction can be brought into close contact with each other in the second direction by utilizing the trapezoidal deformation of the cross-sectional shape of the rectangular conductor.
- the coil 40 can be miniaturized in the second direction (see " ⁇ L" in FIG. 8). It is possible to employ a rectangular conductor having a large dimension in the second direction.
- the motor 10 includes a rotor 20 and a stator 30 (see FIGS. 1 and 2).
- Stator 30 includes coil 40 and stator core 31 .
- Stator core 31 is formed by laminating steel plates.
- Stator core 31 includes a yoke 32 and teeth 35 .
- Coils 40 are provided on teeth 35 .
- the motor 10 can be downsized. In the motor 10, it may be possible to improve the space factor. The efficiency of the motor 10 can be improved by improving the space factor.
- Embodiments can also be as follows. Some of the configurations of the modifications shown below can also be employed in combination as appropriate. In the following, points that are different from the above will be described, and descriptions of similar points will be omitted as appropriate.
- the internal rotation type motor 10 is illustrated as the rotating machine.
- the motor 10 has a coil 40 on the stator 30 (see FIGS. 1 and 2).
- the coil structure of the coil 40 includes a zigzag structure (see FIGS. 6, 7 and upper part of FIG. 8).
- Such a coil structure employed by the coil 40 can also be employed in the stator coils of an epitropical motor.
- the coil structure of the coil 40 can also be employed in generator stator coils and transformer coils.
- the first axial direction coincides with the stacking direction
- the second axial direction is perpendicular to both the stacking direction and the radial direction.
- the setting of the first axial direction and the second axial direction may be opposite to the above. That is, when the motor 10 is used as a reference, the first axial direction may be orthogonal to both the stacking direction and the radial direction, and the second axial direction may coincide with the stacking direction.
- a plurality of coils 40 forming a coil unit 42 for one phase are connected in parallel (see FIG. 5).
- a plurality of coils in a coil unit for one phase may be connected in series.
- the coil unit for one phase can be formed by one continuous rectangular conductor by adopting the techniques disclosed in Patent Documents 1 and 2.
- a coil unit for one phase can be manufactured by a method according to the winding method disclosed in Patent Documents 1 to 3 using a winding device similar to the winding device disclosed therein. However, like the coil 40, the coil is wound in a coil structure including a zigzag structure. It is assumed that the stator core includes 12 teeth, similar to the stator 30 described above.
- a rectangular conductor that connects multiple coils in series is called a "crossover wire.”
- a coil unit for one phase includes four coils each provided with one lead wire at each end and connected by three connecting wires. That is, the four coils, the three connecting wires, and the two lead wires in the coil unit for one phase are the lead wire, the coil, the connecting wire, the coil, the connecting wire, the coil, the connecting wire, the coil, and the lead wire. Consecutive in order. It is assumed that the U-phase, V-phase, and W-phase coil units are connected in star connection.
- one of the two lead wires in the U-phase, V-phase, and W-phase coil units is connected to one lead wire of the other phase coil unit, and the two lead wires The remaining one of the lead wires is connected to the connection terminal of the corresponding phase.
- Reference Signs List 10 motor 20 rotor 21 rotor core 22 shaft 30 stator 31 stator core 32 yoke 33 yoke piece 34 mounting groove 35 tooth 36 slot 40, 40U, 40V, 40W coil 41, 41U, 41V, 41W lead wire 42 , 42U, 42V, 42W coil unit 43, 43U, 43V, 43W connection terminal 44 first connection conductor 45 second connection conductor 50, 51, 52, 53, 54, 55, 56 coil layer 60 insulating member 70 coil 71 , 72, 73, 74, 75, 76 coil layer A first portion B second portion C third portion D fourth portion E1 first shaft portion E2 second shaft portion S gap
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Abstract
Description
回転機としてのモータ10について、図1~5を参照して説明する。モータ10は、各種の製品に搭載される。例えば、モータ10は、電動車両の駆動源として利用される。電動車両の例としては、電気自動車、電動自転車、電動車椅子、電動カート及び電動配膳車が挙げられる。電気自動車は、ハイブリッド自動車を含む。モータ10は、ロータ20と、ステータ30とを備える(図1,2参照)。実施形態は、モータ10として内転型のブラシレスモータを例示する。
コイル構造について図1~4,6を参照して説明する。コイル40は、複数のコイル層50を含む。実施形態では、コイル40は、6個のコイル層50を含む(図3,6参照)。コイル40に設けるコイル層50の数は、2個以上5個以下としてもよく、又は7個以上としてもよい。コイル40のコイル層50の数は、諸条件を考慮して適宜決定される。実施形態では、6個のコイル層50を「コイル層51,52,53,54,55,56」という。コイル層51,52,53,54,55,56を区別しない場合又はこれらを総称する場合、「コイル層50」という。
コイル構造が採用する千鳥構造について、図3,6及び図8上段を参照して説明する。但し、この説明は、第二方向に接するコイル層51,52を対象とする。コイル40では、コイル層52,53、コイル層53,54、コイル層54,55及びコイル層55,56は、コイル層51,52と同様、第二方向に接する。説明は省略するが、コイル層52,53、コイル層53,54、コイル層54,55及びコイル層55,56でも、コイル層51,52と同様の構造が実現される。
実施形態によれば、次のような効果を得ることができる。
実施形態は、次のようにすることもできる。以下に示す変形例のうちの幾つかの構成は、適宜組み合わせて採用することもできる。以下では、上記とは異なる点を説明することとし、同様の点についての説明は適宜省略する。
22 シャフト、 30 ステータ、 31 ステータコア
32 ヨーク、 33 ヨーク片、 34 装着溝、 35 ティース
36 スロット、 40,40U,40V,40W コイル
41,41U,41V,41W 引出線
42,42U,42V,42W コイルユニット
43,43U,43V,43W 接続端子
44 第一連結導体、 45 第二連結導体
50,51,52,53,54,55,56 コイル層
60 絶縁部材、 70 コイル
71,72,73,74,75,76 コイル層
A 第一部分、 B 第二部分、 C 第三部分、 D 第四部分
E1 第一軸部分、 E2 第二軸部分、 S 隙間
Claims (4)
- 平角導体を渦巻き状に巻回させた第一コイル層と、
前記平角導体によって前記第一コイル層と繋がり、前記平角導体を渦巻き状に巻回させた第二コイル層と、を含み、
前記第二コイル層は、前記第二コイル層の前記第一コイル層及び前記第二コイル層で前記平角導体が重なり合う放射状の第一方向に直交する第二方向の第一側の第一側面で前記第一コイル層の前記第二方向の第二側の第二側面と接し、
前記第一コイル層は、
第一部分と、
前記第一部分と連続し且つ内周面で前記第一部分の外周面と接する第二部分と、を含み、
前記第二コイル層は、
第三部分と、
前記第三部分と連続し且つ内周面で前記第三部分の外周面と接する第四部分と、を含み、
前記第三部分は、前記第一側面と前記第二側面とが接した接触状態で、前記第一部分及び前記第二部分と前記第二方向に隣り合い、
前記第四部分は、前記接触状態で、前記第一部分と前記第二方向に隣り合わずに前記第二部分と前記第二方向に隣り合い、
前記第三部分の外周面は、前記接触状態で、前記第一部分の外周面より前記第一方向の外周側で且つ前記第二部分の外周面より前記第一方向の内周側に配置され、
前記第四部分の外周面は、前記接触状態で、前記第二部分の外周面より前記第一方向の外周側に配置される、コイル。 - 前記第三部分の外周面は、前記接触状態で、前記第一部分の外周面より前記第一方向としての第一軸方向の外周側で且つ前記第二部分の外周面より前記第一軸方向の内周側に配置され、
前記第四部分の外周面は、前記接触状態で、前記第二部分の外周面より前記第一軸方向の外周側に配置される、請求項1に記載のコイル。 - 前記第三部分の外周面は、前記接触状態で、前記第一部分の外周面より前記第一軸方向に直交する前記第一方向としての第二軸方向の外周側で且つ前記第二部分の外周面より前記第二軸方向の内周側に配置され、
前記第四部分の外周面は、前記接触状態で、前記第二部分の外周面より前記第二軸方向の外周側に配置される、請求項2に記載のコイル。 - ロータと、
ステータと、を備え、
前記ステータは、
請求項1から請求項3の何れか1項に記載のコイルと、
鋼板を積層して形成され、ヨークと、前記ヨークから前記ロータの側に向かって前記第二方向に突出するティースと、を含むステータコアと、を備え、
前記コイルは、前記ティースに設けられる、回転機。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005304244A (ja) * | 2004-04-15 | 2005-10-27 | Toyota Motor Corp | 回転電機のコイル、回転電機およびコイルの製造方法 |
WO2014068695A1 (ja) * | 2012-10-31 | 2014-05-08 | 三菱電機株式会社 | 回転電機のコイルおよび回転電機 |
JP2014093847A (ja) | 2012-11-02 | 2014-05-19 | Fukui Prefecture | 巻線の製造方法及び製造装置 |
JP2014093846A (ja) | 2012-11-02 | 2014-05-19 | Fukui Prefecture | 巻線構造及びそれを用いた電気機器 |
JP2016063663A (ja) | 2014-09-19 | 2016-04-25 | 福井県 | 固定子の製造方法および装置 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005304244A (ja) * | 2004-04-15 | 2005-10-27 | Toyota Motor Corp | 回転電機のコイル、回転電機およびコイルの製造方法 |
WO2014068695A1 (ja) * | 2012-10-31 | 2014-05-08 | 三菱電機株式会社 | 回転電機のコイルおよび回転電機 |
JP2014093847A (ja) | 2012-11-02 | 2014-05-19 | Fukui Prefecture | 巻線の製造方法及び製造装置 |
JP2014093846A (ja) | 2012-11-02 | 2014-05-19 | Fukui Prefecture | 巻線構造及びそれを用いた電気機器 |
JP2016063663A (ja) | 2014-09-19 | 2016-04-25 | 福井県 | 固定子の製造方法および装置 |
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