WO2021130996A1 - Structure d'extrémité de bobine de stator et procédé de fabrication - Google Patents

Structure d'extrémité de bobine de stator et procédé de fabrication Download PDF

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Publication number
WO2021130996A1
WO2021130996A1 PCT/JP2019/051273 JP2019051273W WO2021130996A1 WO 2021130996 A1 WO2021130996 A1 WO 2021130996A1 JP 2019051273 W JP2019051273 W JP 2019051273W WO 2021130996 A1 WO2021130996 A1 WO 2021130996A1
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WO
WIPO (PCT)
Prior art keywords
coil
stator
diameter side
slot
outer diameter
Prior art date
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PCT/JP2019/051273
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English (en)
Japanese (ja)
Inventor
和裕 長谷川
洋三 廣瀬
アウレル フナル
Original Assignee
日産自動車株式会社
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Publication date
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to PCT/JP2019/051273 priority Critical patent/WO2021130996A1/fr
Publication of WO2021130996A1 publication Critical patent/WO2021130996A1/fr

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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
    • H02K3/28—Layout of windings or of connections between windings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to a coil end structure of a stator and a manufacturing method.
  • An object of the present invention is to provide a coil end structure that can be easily manufactured and that can suppress an increase in the size of the coil end.
  • the coil end structure of the stator is a coil end structure of a stator including a stator core having a plurality of slots penetrating in the axial direction and a plurality of phases of coils wound around the stator core.
  • the coils wound around the stator are arranged radially in the slot from a plurality of conductor segments whose ends project from one axial end face of the stator core and from different slots among the plurality of ends protruding from the slot. It is composed of a connecting coil that is interposed between two predetermined protruding ends and electrically connects the two ends.
  • FIG. 1 is a perspective view of a main part of a stator to which the coil end structure according to the first embodiment is applied.
  • FIG. 2 is a diagram illustrating the shape of the connection coil of the first embodiment.
  • FIG. 3 is a partially enlarged view of a part of the coil end portion shown in FIG.
  • FIG. 4 is a diagram illustrating a method of manufacturing the coil end portion of the first embodiment.
  • FIG. 5 is a schematic cross-sectional view of the space between the first slots formed by the slot coil of the first embodiment as viewed from a cross section parallel to the radial direction.
  • FIG. 6 is a diagram illustrating a modified example of the shape of the connecting coil of the first embodiment.
  • FIG. 1 is a perspective view of a main part of a stator to which the coil end structure according to the first embodiment is applied.
  • FIG. 2 is a diagram illustrating the shape of the connection coil of the first embodiment.
  • FIG. 3 is a partially enlarged view of a part of the coil end portion
  • FIG. 7 is a schematic cross-sectional view seen from a cross section parallel to the radial direction between the first slot coil formed by the slot coil of the first embodiment and the connection coil according to the modified example.
  • FIG. 8 is a perspective view of a main part of the coil end portion of the second embodiment.
  • FIG. 9 is a schematic cross-sectional view of the space between the first slots formed by the slot coils of the second embodiment as viewed from a cross section parallel to the radial direction.
  • FIG. 1 is a perspective view of a main part of a stator 10 to which the coil end structure according to the first embodiment of the present invention is applied.
  • the stator 10 is one of the main components of a rotary electric machine, and is applied to, for example, a generator or an electric motor included in an electric vehicle.
  • FIG. 1 the upper end surface 11 of the stator core 1, the slot coil 2, and the connecting coil 3 are mainly shown. However, in FIG. 1, parts other than the upper end surface 11 of the stator core 1 (inner peripheral surface, most of the outer peripheral surface, and the lower end) are omitted. In addition, the part where the slot coil 2 and the connection coil 3 are shown in FIG. 1 is generically referred to as a coil end part below.
  • the stator core 1 is formed into a cylindrical shape by laminating steel plates press-formed into a predetermined disk shape.
  • the specific shape of the stator core 1 may be the same as the known shape.
  • the stator core 1 of the present embodiment includes 48 teeth and 48 slots formed between adjacent teeth on the inner diameter side thereof.
  • the slot penetrates in the axial direction of the stator core 1 and is formed in a substantially oval shape that is long in the radial direction of the stator core 1 when viewed from the axial direction, and opens at both end surfaces and the inner peripheral surface of the stator core 1 in the axial direction.
  • a stator coil including a slot coil 2 and a connecting coil 3 is wound around a slot formed in the stator core 1.
  • the terms used in the following description to indicate the axial direction, the radial direction, the circumferential direction, the inner diameter side, the outer diameter side, and the like shall indicate the direction with reference to the stator core 1.
  • the upper end surface or the upper surface is the upper end surface in the axial direction and indicates the surface (upper end surface 11) shown in FIG. 1
  • the lower end surface or the bottom surface is also the lower end surface in the axial direction. It shall indicate the surface opposite to the surface represented by 1.
  • the terms “upper and lower” and “bottom” used here are used only for the sake of ease of explanation when referring to the figure, and are not intended to match the upper and lower terms in the actual direction of gravity.
  • the slot coil 2 of this embodiment is a U-shaped conductor segment. Further, the slot coil 2 is a so-called flat wire, and the wider side surface of the four side surfaces is orthogonal to the radial direction, and the narrow side surface is arranged in the slot so as to be orthogonal to the circumferential direction. Consists of one member. Further, the slot coil 2 is inserted from the bottom surface of the stator core 1 so that the two ends are arranged in different slots. What is shown in FIG. 1 is a portion where the end portion of the slot coil 2 inserted from the bottom surface penetrates the slot and protrudes from the upper end surface 11. FIG. 1 shows a state in which eight slot coils 2 are arranged side by side with a predetermined interval in the radial direction in each slot. The slot coil 2 realizes a wound shape as a stator coil wound around the stator core 1 by being electrically connected to a connection coil 3 described later. Details will be described later with reference to FIG. 2 and the like.
  • the connection coil 3 is a thin plate-shaped conductive member.
  • the connection coil 3 has a function of interposing between two predetermined slot coils 2 in the radial direction at the coil end portion and conducting the two predetermined slot coils 2.
  • the predetermined two are two slot coils 2 that form a stator coil corresponding to any one phase in realizing a stator coil that is wound around the stator core 1 for each phase.
  • the stator coil of the present embodiment is configured by alternately joining the slot coil 2 and the connecting coil 3.
  • FIG. 2 is a diagram illustrating the shape of the connection coil 3 of the present embodiment.
  • FIG. 2A is a front view of the connection coil 3 before being provided in the stator core 1 as viewed from the front.
  • FIG. 2B is a perspective view of the connection coil 3 provided on the stator core 1 as viewed from above on the inner diameter side.
  • connection coil 3 of the present embodiment is a flat thin plate as shown in FIG. 2A, and has a square protruding portion on the upper end side at the peripheral end portion thereof.
  • the connecting coil 3 is a conductive member as described above, but its surface is covered with an insulating film except for the conductive surfaces 3a and 3b shown in the drawing.
  • the insulating film may be made of ceramic, resin, or the like, and is not particularly limited as long as it has insulating properties.
  • the conductive surfaces 3a and 3b may be formed by masking a predetermined portion when covering the connecting coil 3 with an insulating film.
  • the conduction surface 3a of the present embodiment is formed on the outer diameter side surface of the protruding portion formed at the upper end of one circumferential end portion (one end) of the connection coil 3.
  • the conductive surface 3b is formed on the inner diameter side surface of the protruding portion formed at the upper end of the other circumferential end (other end) of the connecting coil 3.
  • FIG. 2B when the connecting coil 3 is provided in the stator core 1, it is bent and straightened so as to have an arc shape that is convex toward the outer diameter side when viewed from the upper end and the lower end.
  • connection coil 3 has an aspect ratio that can be easily straightened in an annular shape using a straightening jig, and has a circumferential length (connection length) from the conductive surface 3a to the conductive surface 3b. It is formed so that the plate thickness (diameter thickness) with respect to the aspect ratio is sufficiently thin.
  • the surface area of the connecting coil 3 can be increased by forming the connecting coil 3 on a thin plate.
  • the heat conduction (heat receiving or heat radiating) area of the connecting coil 3 with the refrigerant can be increased, so that the cooling efficiency of the stator 10 can be improved.
  • stator coil configured in this way.
  • FIG. 3 is an enlarged partially enlarged view of a part of the coil end portion shown in FIG. The figure shows a state in which the slot coil 2 and the connecting coil 3 form an electric path for each phase at the coil end portion.
  • slot coils 2 in the present embodiment are arranged in the radial direction for each slot as shown in the figure. Then, between the slot coils 2 arranged in the row on the outermost diameter side and the slot coils 2 arranged in the second row counting from the outer diameter side (between the first slot coils), counting from the outer diameter side. Between the slot coil 2 arranged in the third row and the slot coil 2 arranged in the fourth row counting from the outer diameter side (between the second slot coils), and arranged in the fifth row counting from the outer diameter side. Between the slot coil 2 and the slot coil 2 arranged in the 6th row counting from the outer diameter side (between the 3rd slot coil), and the slot arranged in the 7th row counting from the outer diameter side.
  • the connecting coil 3 is displaced in the circumferential direction by one slot from each other in the radial direction. It is laminated and intervenes. Although it cannot be read from the figure, seven connecting coils 3 are laminated between one slot coil.
  • connection coil 3 indicated by the arrow A in the figure is arranged between the first slot coils, and the conduction surface 3a formed on the outer diameter side at the upper end of one of the circumferential ends is on the outermost diameter side.
  • the conductive surface 3b formed on the inner diameter side at the upper end of the other circumferential end while being joined to the inner diameter side of the slot coil 2 arranged in the second row is indicated by the arrow C arranged in the second row. It is arranged so as to be joined to the outer diameter side of the slot coil 2.
  • the slot coil 2 located on the outermost diameter side at least the portion of the inner diameter side surface of the slot coil 2 that is joined to the conduction surface 3a is a conduction surface that can be electrically connected to the connection coil 3. It is configured to be.
  • the slot coil 2 (see arrow C) located in the second row from the outer diameter side at least a portion of the outer diameter side surface of the slot coil 2 that is joined to the conductive surface 3b can be electrically connected to the connecting coil 3. It is configured to be a conductive surface.
  • the stator coil constituting any one phase the slot coil 2 in the first row and the stator coil 2 in the second row are electrically connected via the connection coil 3 arranged between the first slot coils.
  • connection coil 3 arranged between the other end of the slot coil 2 in the second row from the outer diameter side (see arrow C) and the second slot coil, and the slot coil 2 in the third row from the outer diameter side. are connected in the same way.
  • the slot coil 2 and the connecting coil 3 are alternately connected to each other by joining the conductive surfaces between the first slot coil and the fourth slot coil, so that the slot coil 2 and the connecting coil 3 are wound around the stator core 1 in a so-called distributed winding.
  • a rotating stator coil can be formed to form an electrical path for each phase. A method of manufacturing a stator coil constituting such an electric path will be described with reference to FIG.
  • FIG. 4 is a diagram illustrating a method of manufacturing a coil end portion of the stator 10 of the present embodiment in particular.
  • FIG. 4A shows a state in which a plurality of connection coils 3 in a state of being bent and straightened by a straightening jig (not shown) are subassembled in an annular shape so as to correspond between the first to fourth slot coils. It is a figure which shows.
  • FIG. 4B is a diagram showing a state in which the slot coil 2 inserted into the stator core 1 from the bottom surface side protrudes from the upper end surface and before the connecting coil 3 is fitted.
  • a sub-assembly composed of a plurality of connecting coils 3 formed in an annular shape along the annular shape between one of the first to fourth slot coils is also referred to as a connecting coil group below.
  • connecting coil group corresponding to one slot coil 48 connecting coils 3 are overlapped with respect to the adjacent connecting coil 3 by one slot in the circumferential direction of either clockwise or counterclockwise. In this state, it is formed by bending and straightening in an annular shape with a straightening jig (not shown). What is shown in FIG. 4A is a group of annular connection coils corresponding to each of the first to fourth slot coils.
  • connection coil group corresponding to the inner diameter side of the slot coil is formed with respect to the diameter of the ring formed by the connection coil group corresponding to the first slot coil located on the outermost outer diameter side.
  • the diameter of the annulus is smaller. Therefore, the circumferential length (connection length) of the connection coil 3 needs to be appropriately adjusted according to the radial position between the slot coils to be fitted. Therefore, the circumferential length of the connection coil 3 of the present embodiment is set to the circumferential length of seven slots of the stator core 1 at the radial position between the slot coils to be fitted.
  • the connection coil group configured in this way is inserted between the first to fourth slot coils of the coil end portion shown in FIG. 4B at the same time from above in the axial direction or for each slot coil.
  • the coil end portion of the present embodiment is formed by joining the opposing conductive surfaces of the slot coil 2 and the connecting coil 3 to each other.
  • the coil end portion can be assembled by first forming the annular shape with only the connecting coil 3 and inserting the annular shape between the corresponding first to fourth slot coils from the axial direction. Therefore, the stator 10 can be assembled easily and at high speed without requiring a complicated molding process such as wire forming and press bending as in the conventional case.
  • FIG. 5 is a schematic cross-sectional view of the coil end portion of the present embodiment as viewed from a cross section parallel to the radial direction between the first slots formed by the slot coil 2 indicated by the arrow B in FIG.
  • the right side of the figure is the outer diameter side.
  • the space between the first slot coils is a space formed by facing a portion (notch portion) formed thinner in the radial direction than the other portion at the end portion of the slot coil 2. More specifically, between the first slot coils, the slot coils 2 having notches on the inner diameter side of one end and the outer diameter side of the other end have the notches facing each other in the same slot. It is a space formed by being adjacent to each other. However, the space between the first slot coils does not necessarily have to be formed by the slot coils 2 having a notch.
  • the first slot coils may be formed by bending the slot coils 2 having the same radial thickness in a crank shape (see the crank portion 23 shown in FIG. 9).
  • seven connecting coils 3 are configured to overlap in the radial direction between the first slots of the present embodiment.
  • the connecting coil 3 is inserted between the first slots in a state of being bent and straightened in an annular shape by a straightening jig as described above with reference to FIG.
  • the restoring force of the connecting coil 3 generates a force in the direction toward the outer diameter side (see the white arrow in the figure), and the force on the outer diameter side of the connecting coil 3 is generated.
  • the surface abuts against the inner diameter side surface of the slot coil 2.
  • the connecting coil 3 is held at a predetermined position between the first slots.
  • the conductive surface 3a of the connecting coil 3 By joining the conductive surface 3b and the conductive surface 2b formed at least on the outer diameter side of the other end of the slot coil 2 in contact with the conductive surface 3b, a phase-by-phase electric path as a stator coil can be created. It is composed.
  • the bonding between the conductive surfaces may be realized by, for example, welding.
  • the restoring force of the connecting coil 3 is strong, the contact resistance between the conductive surface 3a of the connecting coil 3 and the conductive surface 3a of the slot coil 2, and the conductive surface 3b of the connecting coil 3 and the conductive surface 3b of the slot coil 2. If the contact resistance satisfies a predetermined criterion for the stator coil, the slot coil 2 and the connecting coil 3 may be joined by the conductive surfaces being strongly contacted with each other by the restoring force of the connecting coil 3.
  • the predetermined standard may be appropriately set according to the characteristics required for the electric motor to which the stator is applied. Thereby, the stator coil including the slot coil 2 and the connection coil 3 can be formed.
  • the two slot coils 2 can be electrically connected by the connecting coil 3 made of a plate-shaped member, which has the following merits as compared with the conventional case. That is, in the past, in order to connect the slot coils, complicated bending molding was required to avoid interference with other slot coils, whereas in this embodiment, complicated bending molding is not required. Therefore, the manufacturing cost can be reduced.
  • the slot coil and / or the connecting member connecting the slot coils is complicatedly bent or made into multiple phases. While there is a problem that the coil end portion becomes larger in the axial direction due to overlapping, in the present embodiment, it is sufficient to stack the plate-shaped connecting coil 3 between the slot coils 2, so that the coil end is sufficient. The axial height of the part can be reduced.
  • the two slot coils can be connected by the connecting coil 3 at the shortest straight line distance. , Copper loss generated in the stator coil can be reduced.
  • the connecting coil 3 does not necessarily have to have a protruding portion as shown in FIG. 3, and may be a rectangular connecting coil 30 as shown in FIG.
  • the connection coil 30 includes a conductive surface 30a formed on the outer diameter side of one circumferential end portion and a conductive surface 30b formed on the inner diameter side of the other circumferential end portion.
  • the connection coil 30 having such a shape is also bent and straightened in an annular shape like the connection coil 3, and is arranged between the two predetermined slot coils 2.
  • a specific configuration example of the connection coil 30 arranged between the two predetermined slot coils 2 will be described with reference to FIG. 7.
  • FIG. 7 is a coil end portion of this modified example, and is a schematic cross-sectional view seen from a cross section parallel to the radial direction between the first slot coils formed by the two slot coils 2 as in FIG.
  • the right side of the figure is the outer diameter side.
  • connection coil 30 is held at a predetermined position between the first slots by the restoring force of the connecting coil 30 as described with reference to FIG.
  • the conduction surface 30a of the connection coil 30 and the conduction surface 3a of the slot coil 2 and the conduction surface 30b of the connection coil 30 and the conduction surface 3b of the slot coil 2 are conducted by the restoring force of the connection coil 30.
  • the surfaces may be joined by contacting each other, or may be joined by welding.
  • the conductive surfaces may be joined by the following method. That is, in this modification, the conduction surface 30a of the connection coil 30 and the slot coil 2 are conductive by applying forces from both sides (inner diameter side and outer diameter side) of the two slot coils 2 sandwiching the plurality of stacked connection coils 30. The surface 3a and the conductive surface 30b of the connecting coil 30 and the conductive surface 3b of the slot coil 2 may be pressed and plastically deformed to join them.
  • the straightening jig 6 shown in FIG. 7 may be used.
  • the straightening jig 6 presses against the upper ends of the two slot coils 2 forming between the first slot coils from above in the axial direction the straightening jig 6 comes into contact with the outer diameter side of the upper ends of the slot coils 2 located on the outer diameter side.
  • the slot coil 2 is provided with an inclination 6a for moving the slot coil 2 to the inner diameter side, and an inclination 6b for abutting the inner diameter side of the upper end of the slot coil 2 located on the inner diameter side and moving the slot coil 2 to the outer diameter side.
  • the stator core 1 having a plurality of slots penetrating in the axial direction and the multi-phase coil (stator coil) wound around the stator core 1 are provided. It is a coil end structure of the stator 10.
  • the coils wound around the stator 10 are arranged in a slot in a radial direction, and a plurality of conductor segments (slot coils 2) whose ends project from one axial end surface (upper end surface 11) of the stator core 1 and a slot. It is composed of a connection coil 3 that is interposed between two predetermined ends protruding from different slots among a plurality of ends protruding from the two ends and electrically connects the two ends.
  • the two ends have a first conductive surface (conducting surface 2a) on the inner diameter side of the stator at one end, and also have a first conductive surface (conducting surface 2a).
  • a second conductive surface (conducting surface 2b) is provided on the outer diameter side of the stator at the other end, and the connecting coil 3 is a plate-shaped member and has a third conductive surface on the outer diameter side of the stator at one end in the circumferential direction of the stator.
  • the two slot coils 2 can be electrically connected by the connecting coil 3 made of a plate-shaped member, so that the two slot coils 2 can be connected by the connecting coil 3 at the shortest straight distance. Copper loss generated in the stator coil can be reduced.
  • the conductor segment (slot coil 2) has a U-shape, and the first conductive surface (conducting surface 2a) is attached to one end of one conductor segment. ), And a second conductive surface (conducting surface 2b) at the other end of the other conductor segment.
  • a distributed winding stator coil can be realized by forming a coil end portion provided with the connecting coil 3 only on one axial end surface, so that it is possible to suppress an increase in the axial length. it can.
  • one end portion has a first notch (notch portion) on the inner diameter side of the stator, and the other end portion is on the outer diameter side of the stator. It has a second notch (notch portion), and the connecting coil 3 is held between the first notch and the second notch.
  • the stator 10 including the stator coil including the slot coil 2 and the connecting coil 3 can be realized without increasing the size in the radial direction.
  • the connecting coil 3 is a flat plate-shaped member whose longitudinal direction coincides with the circumferential direction of the stator, and is bent in an annular shape along the annular shape of the stator core. It is held between the two ends in a straightened state. As a result, the connecting coil 3 can be easily held at a predetermined position between the two slot coils 2 by the restoring force to the flat plate shape.
  • the coil manufacturing method of the first embodiment is a method of manufacturing a coil (stator coil) wound around a stator core 1 having a plurality of slots penetrating in the axial direction, and is a method of manufacturing a plurality of conductor segments (slot coil 2). ) Are arranged side by side at predetermined intervals in the radial direction of the slots, the ends of the conductor segments are projected from the axial end faces of the stator core 1, and two of the ends of the plurality of conductor segments are adjacent to each other in the radial direction.
  • a plurality of connecting coils 3 as plate-like members are inserted between one end portion in the axial direction, and the inner diameter side surface of the end portion arranged on the outer diameter side of the two adjacent end portions and the connecting coil 3
  • the surfaces on the inner diameter side of the are joined together.
  • the coil end portion can be assembled by inserting the connecting coil 3 between the slot coils 2 from the axial direction, so that a complicated molding process such as wire forming or press bending as in the conventional case is not required.
  • the stator 10 can be assembled easily and at high speed.
  • the complicated molding process that has been conventionally required becomes unnecessary, the manufacturing cost can be reduced.
  • FIG. 8 is a schematic configuration diagram illustrating the coil structure of the stator 20 of the second embodiment. In the figure, only the coil end portion is shown.
  • the slot coil 22 of the present embodiment has a crank portion 23 formed by bending toward the outer diameter side at the coil end portion and further bending upward (outward in the axial direction). Details between the first slot coils formed by such slot coils 22 will be described with reference to FIG.
  • FIG. 9 is a schematic configuration diagram of the coil end portion of the present embodiment as viewed from a cross section parallel to the radial direction between the first slot coils formed by the two slot coils 22.
  • the right side of the figure is the outer diameter side, and the slot coil 22 located on the outer diameter side is formed with a crank portion 23.
  • crank portion 23 By forming such a crank portion 23 on the slot coil 22, the surface on the outer diameter side of the slot coil 22 located on the inner diameter side and the surface on the inner diameter side of the slot coil 22 located on the outer diameter side are formed.
  • the formed space can be expanded in the radial direction.
  • the radial thickness of the connecting coil 3 arranged in the space can be further increased. Therefore, for example, even when the cross-sectional area optimized from the viewpoint of reducing copper loss is taken into consideration, the axial length having a larger radial thickness than that of the connection coil 3 of the first embodiment can be obtained. Since it can be shortened, the axial height of the coil end portion can be made smaller even if the crank portion 23 is added.
  • crank portion 23 does not necessarily have to be bent toward the outer diameter side as shown in the figure, and may be bent toward the inner diameter side. Further, the crank portion 23 does not necessarily have to be bent at a right angle to the outer diameter side as shown in the drawing, and may be formed so as to be inclined upward on the outer diameter side or the inner diameter side and bent outward in the axial direction. In that case, the name of the crank portion 23 is the inclined portion 23.
  • the conductor segment (slot coil 22) is bent toward the outer diameter side or the inner diameter side in the stator radial direction and is bent outward in the axial direction. It has an inclined portion 23 that is inclined toward the outer diameter side or the inner diameter side in the stator radial direction and is bent outward in the axial direction.
  • the space formed by the outer diameter side surface of the slot coil 22 located on the radial side and the inner diameter side surface of the slot coil 22 located on the outer diameter side can be expanded in the radial direction.
  • the slot coil 2 has a U-shape in the above embodiment
  • the U-shape here does not necessarily have to be a U-shape having a curved line. It suffices if both ends face in one direction and each end can be inserted into a different slot of the stator core, including a substantially U-shape composed of a straight line.
  • the slot coil 2 does not necessarily have to be U-shaped, and may have a rod shape in which both ends face in opposite directions.
  • the coil end portions described in the above-described embodiment are formed on both end faces in the axial direction of the stator core 1.
  • connection coil 3 described above 7 slots
  • number of connection coils 3 constituting the connection coil group 48 sheets
  • the number between the slot coils (1st to 4th total 4).
  • Etc. are examples, and may be appropriately changed according to the number of slots of the applicable stator core and the number of windings of the stator coil to be wound.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Cette structure d'extrémité de bobine de stator est pourvue : d'un noyau de stator qui a une pluralité de fentes formées pour s'étendre dans la direction axiale ; et d'une pluralité de phases de bobines enroulées sur le noyau de stator. Les bobines enroulées sur le stator comprennent : une pluralité de segments conducteurs qui sont disposés côte à côte dans les fentes dans la direction radiale et qui ont des extrémités faisant saillie à partir d'une surface d'extrémité de direction axiale du noyau de stator ; et une bobine de connexion qui est disposée entre deux extrémités prescrites faisant saillie à partir de différentes fentes, parmi la pluralité d'extrémités faisant saillie à partir des fentes, de façon à connecter électriquement les deux extrémités.
PCT/JP2019/051273 2019-12-26 2019-12-26 Structure d'extrémité de bobine de stator et procédé de fabrication WO2021130996A1 (fr)

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PCT/JP2019/051273 WO2021130996A1 (fr) 2019-12-26 2019-12-26 Structure d'extrémité de bobine de stator et procédé de fabrication

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PCT/JP2019/051273 WO2021130996A1 (fr) 2019-12-26 2019-12-26 Structure d'extrémité de bobine de stator et procédé de fabrication

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001292548A (ja) * 2000-01-31 2001-10-19 Hitachi Ltd 回転電機の固定子
JP2002262497A (ja) * 2001-02-28 2002-09-13 Hitachi Ltd 回転電機及びその製造方法
JP2006050853A (ja) * 2004-08-06 2006-02-16 Yaskawa Electric Corp モータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001292548A (ja) * 2000-01-31 2001-10-19 Hitachi Ltd 回転電機の固定子
JP2002262497A (ja) * 2001-02-28 2002-09-13 Hitachi Ltd 回転電機及びその製造方法
JP2006050853A (ja) * 2004-08-06 2006-02-16 Yaskawa Electric Corp モータ

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