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WO2024162233A1 - Motor and coil winding method - Google Patents

Motor and coil winding method Download PDF

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Publication number
WO2024162233A1
WO2024162233A1 PCT/JP2024/002563 JP2024002563W WO2024162233A1 WO 2024162233 A1 WO2024162233 A1 WO 2024162233A1 JP 2024002563 W JP2024002563 W JP 2024002563W WO 2024162233 A1 WO2024162233 A1 WO 2024162233A1
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WO
WIPO (PCT)
Prior art keywords
coil
segment
end portion
coil segment
axial
Prior art date
Application number
PCT/JP2024/002563
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French (fr)
Japanese (ja)
Inventor
雄己 石井
大樹 土方
Original Assignee
株式会社小松製作所
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Filing date
Publication date
Application filed by 株式会社小松製作所 filed Critical 株式会社小松製作所
Publication of WO2024162233A1 publication Critical patent/WO2024162233A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles
    • 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 purpose of this disclosure is to provide a motor and coil winding method with improved vibration resistance.
  • a motor includes a stator core, a plurality of slots arranged in the circumferential direction of the stator core, and coils arranged in a single layer in the slots, the coils being formed by joining rotor-side ends of a first coil segment that is wound in a spiral shape while shifting its position from the back yoke side to the core side, and a second coil segment that is wound in a spiral shape while shifting its position from the core side to the back yoke side, the first coil segment and the second coil segment being arranged crosswise at different heights in a first coil end portion on one axial side, and being arranged alternately between the rotor side and the back yoke side in a second coil end portion on the other axial side.
  • a method for winding a coil in a single layer around a plurality of slots arranged in the circumferential direction of a stator core including: winding a first coil segment of the coil in a spiral shape while shifting its position from the back yoke side to the core side; winding a second coil segment of the coil in a spiral shape while shifting its position from the core side to the back yoke side; arranging the first coil segment and the second coil segment crossing each other at different heights at a first coil end portion on one axial side; and arranging them alternately between the rotor side and the back yoke side at a second coil end portion on the other axial side; and joining the rotor side ends of the first coil segment and the second coil segment.
  • This disclosure provides a motor and coil winding method with improved vibration resistance.
  • FIG. 1 is a diagram illustrating a motor according to an embodiment.
  • FIG. 2 is a plan view illustrating a stator core and a coil according to the embodiment.
  • FIG. 3 is a side view showing an outline of the coil according to the embodiment.
  • FIG. 4 is a plan view showing an outline of the coil according to the embodiment.
  • FIG. 5 is a front view showing an outline of the coil according to the embodiment.
  • FIG. 6 is a side view showing an outline of the coil according to the embodiment.
  • FIG. 7 is a perspective view showing an outline of a coil according to an embodiment.
  • FIG. 8 is a front view showing an outline of a coil according to a modified example.
  • FIG. 1 is a diagram showing a motor 1 according to an embodiment.
  • the motor 1 is a three-phase switched reluctance motor.
  • the motor 1 includes a cylindrical stator 2 and a rotor 3 arranged inside the stator 2.
  • the stator 2 has a cylindrical stator core 4 and a coil 5 supported by the stator core 4.
  • the inner peripheral surface of the stator 2 and the outer peripheral surface of the rotor 3 face each other with a gap therebetween.
  • the rotor 3 faces the stator core 4.
  • the rotor 3 rotates about a rotation axis AX.
  • the rotation axis AX of the rotor 3 and the central axis of the stator 2 are the same.
  • the rotor 3 is connected to an object E via a shaft 8.
  • the object E is, for example, an engine mounted on a hybrid excavator, which is a type of construction machine.
  • the motor 1 functions as a generator driven by the engine.
  • the direction parallel to the rotation axis AX is referred to as the axial direction.
  • One side in the axial direction is referred to as the one axial side, and the opposite side of the one axial side is referred to as the other axial side.
  • the direction going around the rotation axis AX is referred to as the circumferential direction.
  • One side of the rotation direction in the circumferential direction is referred to as the one circumferential side, and the opposite side of the one circumferential side is referred to as the other circumferential side.
  • the radial direction of the rotation axis AX is referred to as the radial direction.
  • the side in the radial direction that is away from the central axis AX is referred to as the radial outer side, and the opposite side of the radial outer side is referred to as the radial inner side.
  • the rotor 3 is arranged so that it can face the stator core 4.
  • the rotor 3 has a rotor holder 6 and a rotor core 7 held by the rotor holder 6.
  • the rotor holder 6 is made of a non-magnetic material.
  • the rotor core 7 is made of a magnetic material.
  • the stator core 4 has slots 9 that accommodate the coils 5.
  • the slots 9 are recesses that are recessed radially outward from the inner peripheral surface of the stator core 4.
  • Multiple slots 9 are arranged circumferentially on the inner peripheral surface of the stator core 4.
  • the slots 9 extend in the axial direction.
  • the slots 9 are arranged on the inner peripheral surface of the stator core 4.
  • the slots 9 are open toward one axial side, the other axial side, and toward the radially inward direction.
  • the stator core 4 has multiple teeth 10 arranged between adjacent slots 9 in the circumferential direction.
  • the teeth 10 are the portions of the stator core 4 around which the coils 5 are wound.
  • the teeth 10 support the coils 5.
  • the teeth 10 are inserted into the openings of the coils 5.
  • Fig. 3 is a side view showing an outline of the coil according to the embodiment.
  • Fig. 4 is a plan view showing an outline of the coil according to the embodiment.
  • Fig. 5 is a front view showing an outline of the coil according to the embodiment.
  • Fig. 6 is a side view showing an outline of the coil according to the embodiment.
  • Fig. 7 is a perspective view showing an outline of the coil according to the embodiment.
  • the number of turns of the coil is simplified and the thickness of the conductor is increased for the purpose of explanation.
  • the circumferential direction is illustrated as being not circular but generally linear.
  • the coil 5 is arranged around the teeth 10.
  • the coil 5 is supported by the teeth 10.
  • the coil 5 has an opening.
  • the teeth 10 are inserted into the opening of the coil 5.
  • the coil 5 includes a coil body portion 51, a coil end portion 52, and a coil end portion 53.
  • the portion of the coil 5 that is accommodated in the slot 10 is the coil body portion 51.
  • the portion of the coil 5 that protrudes from the stator core 4 to one side in the axial direction is the coil end portion 52.
  • the portion of the coil 5 that protrudes from the stator core 4 to the other side in the axial direction is the coil end portion 53.
  • the coil 5 is composed of a linear or band-shaped conductor, such as a rectangular wire, a round wire, or a plate-shaped segment conductor.
  • the coil 5 is composed of a conductor arranged in a spiral shape.
  • the coil 5 may be composed of a single conductor wound in a spiral shape, or may be composed of multiple conductors connected in a spiral shape.
  • the winding method and connection method of the coil 5 are not limited.
  • the coil 5 includes a U-phase coil (first phase coil) 5U, a V-phase coil (second phase coil) 5V, and a W-phase coil (third phase coil) 5W.
  • the coil 5 is wound in a single layer within the slot 9, but at the coil end 52 it partially crosses over to form two layers. A portion of the coil 5 is housed in the slot 9 and is supported by the teeth 10.
  • the coil 5 is formed by joining a first coil segment 5F wound around the teeth 10 from the back yoke side toward the core side, and a second coil segment 5R wound around the teeth 10 from the core side toward the back yoke side. More specifically, the coil 5 is formed by joining the rotor-side ends of the first coil segment 5F wound in a spiral shape while shifting its position from the back yoke side to the core side, and the second coil segment 5R wound in a spiral shape while shifting its position from the core side to the back yoke side.
  • the first coil segment 5F1 is formed by joining a lower segment conductor 5FD1 and an upper segment conductor 5FU1 by pressure welding. On one circumferential side, an end portion on one axial side of the lower segment conductor 5FD1 and an end portion on the other axial side of the upper segment conductor 5FU1 are joined.
  • the lower segment conductor 5FD1 is a U-shaped segment conductor.
  • the lower segment conductor 5FD1 has no twist in the winding direction.
  • the upper segment conductor 5FU1 is a U-shaped segment conductor.
  • the upper segment conductor 5FU1 is located on the tooth 10 on one axial side.
  • the upper segment conductor 5FU1 has a twist in the winding direction.
  • the upper segment conductor 5FU1 is bent at a bent portion 5FU1a and a bent portion 5FU1b.
  • One circumferential side of the upper segment conductor 5FU1 is located closer to the rotor than the other circumferential side.
  • the other axial end of the upper segment conductor 5FU1 is joined to one axial end of the lower segment conductor 5FD2 of the first coil segment 5F2.
  • the first coil segment 5F2 is formed by joining a lower segment conductor 5FD2 and an upper segment conductor 5FU2.
  • the lower segment conductor 5FD2 is configured similarly to the lower segment conductor 5FD1.
  • the upper segment conductor 5FU2 is configured similarly to the upper segment conductor 5FU1.
  • On one circumferential side an end portion on one axial side of the lower segment conductor 5FD2 is joined to an end portion on the other axial side of the upper segment conductor 5FU2.
  • an end portion on the other axial side of the upper segment conductor 5FU2 of the first coil segment 5F1 is joined to an end portion on one axial side of the lower segment conductor 5FD3.
  • the first coil segment 5F3 is a lower segment conductor 5FD3. On the other circumferential side, one end of the lower segment conductor 5FD3 in the axial direction is joined to the other end of the upper segment conductor 5FU2 of the first coil segment 5F2 in the axial direction.
  • the winding of the first coil segment 5F begins at the lower segment conductor 5FD3 of the first coil segment 5F3.
  • the lower segment conductor 5FD3 is joined on one axial side to the jumper wire 55F.
  • the end of the first coil segment 5F on the back yoke side is a jumper wire 55F.
  • the second coil segment 5R1 is formed by joining an upper segment conductor 5RU1 and a lower segment conductor 5RD1. On one circumferential side, the end of the upper segment conductor 5RU1 on the other axial side and the end of the lower segment conductor 5RD1 on one axial side are joined.
  • the upper segment conductor 5RU1 is located on the upper segment conductor 5FU1 of the first coil segment 5F on one axial side.
  • the upper segment conductor 5RU1 is a U-shaped segment conductor.
  • the upper segment conductor 5RU1 has a twist in the winding direction.
  • the upper segment conductor 5RU1 is bent at the bending portion 5RU1a and the bending portion 5RU1b.
  • the other circumferential side of the upper segment conductor 5RU1 is located closer to the rotor than the one circumferential side.
  • the end of the lower segment conductor 5RD1 on one axial side is joined to the end of the upper segment conductor 5RU2 on the other axial side of the upper segment conductor 5RU2 of the second coil segment 5R2.
  • the lower segment conductor 5RD1 is a U-shaped segment conductor.
  • the lower segment conductor 5RD1 does not have a twist in the winding direction.
  • the second coil segment 5R2 is formed by joining an upper segment conductor 5RU2 and a lower segment conductor 5RD2.
  • the upper segment conductor 5RU2 is configured similarly to the upper segment conductor 5RU1.
  • the lower segment conductor 5RD2 is configured similarly to the lower segment conductor 5RD1.
  • the other axial end of the lower segment conductor 5RD2 of the second coil segment 5R1 is joined to the jumper wire 55R.
  • the other axial end of the upper segment conductor 5RU2 is joined to one axial end of the lower segment conductor 5RD2.
  • the second coil segment 5R begins winding at the upper segment conductor 5RU1 of the first coil segment 5R1.
  • the end of the second coil segment 5R on the back yoke side is a jumper wire 55R.
  • the other axial side of the upper segment conductor 5RU1 of the first coil segment 5R1 is joined to one axial side of the lower segment conductor 5FD1 of the first coil segment 5F1.
  • the first coil segment 5F and the second coil segment 5R are arranged crosswise at different heights in the first coil end portion 52 on one axial side.
  • the upper segment conductor 5RU of the second coil segment 5R is located above the upper segment conductor 5FU of the first coil segment 5F on one axial side.
  • the first coil segment 5F and the second coil segment 5R are arranged alternately between the rotor side and the back yoke side at the second coil end portion 52 on the other axial side. In other words, the first coil segment 5F and the second coil segment 5R do not intersect at the second coil end portion 52 on the other axial side.
  • the axial coil width of the first coil end portion 52 of the coil 5 is the sum of the coil width w1 of the first coil segment 5F at the first coil end portion 52, the coil width w2 of the second coil segment 5R, and the gap between them.
  • the axial coil width w3 of the second coil end portion 52 of the coil 5 is the same as the coil width w1 of the first coil segment 5F and the coil width w2 of the second coil segment 5R at the second coil end portion 52.
  • the axial coil width of the first coil end portion 52 is wider than the axial coil width of the second coil end portion 52.
  • Windding method A method of winding the coils 5, which are arranged in a single layer in the multiple slots 9 arranged in the circumferential direction of the stator core 4, will be described.
  • the first coil segment 5F of the coil 5 is wound in a spiral shape while shifting its position from the back yoke side to the core side.
  • the first coil segment 5F is formed by joining the lower segment conductor 5FD and the upper segment conductor 5FU in order from the back yoke side to the core side.
  • the second coil segment 5R of the coil 5 is wound in a spiral shape while shifting its position from the core side to the back yoke side.
  • the second coil segment 5R is formed by joining the upper segment conductor 5FU and the lower segment conductor 5FD in order from the core side to the back yoke side.
  • the first coil segment 5F is wound, and then the second coil segment 5R is wound.
  • the first coil segment 5F and the second coil segment 5R are arranged crossing each other at different heights in the first coil end portion 52.
  • the first coil segment 5F and the second coil segment 5R are arranged alternately between the rotor side and the back yoke side in the second coil end portion 53.
  • the rotor side ends of the first coil segment 5F and the second coil segment 5R are joined together. In this manner, the coil 5 is wound.
  • the coil 5 is formed by joining the rotor-side ends of the first coil segment 5F, which is wound in a spiral shape while shifting its position from the back yoke side to the core side, and the second coil segment 5R, which is wound in a spiral shape while shifting its position from the core side to the back yoke side.
  • the first coil segment 5F and the second coil segment 5R are arranged crossing each other at different heights in the first coil end portion 52 on one axial side, and are arranged alternately between the rotor side and the back yoke side in the second coil end portion 53 on the other axial side.
  • the back yoke side end of the first coil segment 5F and the back yoke side end of the second coil segment 5R are crossover wires 55F and 55R.
  • the winding ends of the coil 5 can both be located on the back yoke side.
  • the length of the crossover wire 55 can be reduced.
  • vibration can be reduced, so vibration resistance can be improved.
  • the length of the crossover wire can be reduced, so loss due to eddy current can be reduced.
  • the upper segment conductor 5RU1 is located on one axial side of the upper segment conductor 5FU1 of the first coil segment 5F. According to the embodiment, the winding ends of the coil 5 can both be located on the rotor side.
  • the axial coil width of the first coil end portion 52 of the coil 5 is the sum of the coil widths of the first coil segment 5F and the second coil segment 5R at the first coil end portion 52.
  • the axial coil width of the second coil end portion 53 of the coil 5 is the same as the coil widths of the first coil segment 5F and the second coil segment 5R at the second coil end portion 52.
  • the coil 5 can be formed from a segment conductor with a constant coil width. According to the embodiment, a simple configuration can be achieved.
  • the coil width in the axial direction of the first coil end portion 52 is wider than the coil width in the axial direction of the second coil end portion 53. According to the embodiment, the axial direction of the second coil end portion 53 can be made smaller.
  • vibrations can be suppressed without using additional components.
  • the embodiment can suppress vibrations without increasing the number of parts.
  • FIG. 8 is a front view showing an outline of a coil according to the modified example.
  • the coil widths w1 and w2 of the first coil end portion 52 of the first coil segment 5F and the second coil segment 5R are narrower than the other portions.
  • the coil width in the axial direction of the first coil end portion 52 is the same as the coil width w3 in the axial direction of the second coil end portion 53.
  • the rotor 3 is arranged inside (on the inner circumference side) of the stator core 4, and the motor 1 is an inner rotor motor.
  • the rotor 3 only needs to be arranged in a position facing the stator core 4.
  • the motor 1 may be an outer rotor type motor in which the rotor 3 is arranged on the outer circumference side of the stator core 4, a dual rotor type motor in which the rotor 3 is arranged on both the inner and outer circumference sides of the stator core 4, or an axial gap type motor in which the rotor 3 is arranged on the axial side of the stator core 4.

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

Abstract

A motor 1 comprises: a stator core 4; a plurality of slots 9 disposed in a circumferential direction of the stator core 4; and a coil 5 disposed in a single layer winding in each slot 9. The coil 5 is formed by joining together rotor-side ends of a first coil segment 5F and a second coil segment 5R, the first coil segment 5F being wound in a spiral form while shifting in position from a back yoke side to a core side, the second coil segment 5R being wound in a spiral form while shifting in position from the core side to the back yoke side. The first coil segment 5F and the second coil segment 5R are disposed at different heights to cross each other in a first coil end portion 52 on one side in an axial direction, and are disposed alternately between the rotor side and the back yoke side in a second coil end portion 53 on the other side in the axial direction.

Description

モータ及びコイルの巻き付け方法Motor and coil winding method
　本開示は、モータ及びコイルの巻き付け方法に関する。 This disclosure relates to a motor and a coil winding method.
　ステータコアの各ティースに巻装された集中巻コイルを有するステータと、ロータとを備える回転電機が知られている（例えば、特許文献１参照）。特許文献１に記載の技術では、コイルは一層巻で巻回されている。 A rotating electric machine is known that includes a stator having concentrated winding coils wound around each tooth of the stator core, and a rotor (see, for example, Patent Document 1). In the technology described in Patent Document 1, the coil is wound in a single layer.
国際公開第２０１４／０２０７５５号公報International Publication No. 2014/020755
　特許文献１に記載の技術では、コイルの巻き終わりが、ロータ側に位置する。これにより、バックヨーク側に引き出すために、渡り線長さが長くなる。渡り線の長さが長くなると、耐振性が低下するおそれがある。 In the technology described in Patent Document 1, the end of the coil winding is located on the rotor side. This means that the length of the jumper wire is long in order to pull it out to the back yoke side. If the jumper wire is long, there is a risk that vibration resistance will decrease.
　本開示は、耐振性を向上したモータ及びコイルの巻き付け方法を提供することを目的とする。 The purpose of this disclosure is to provide a motor and coil winding method with improved vibration resistance.
　本開示に従えば、ステータコアと、前記ステータコアの周方向に配置された複数のスロットと、前記スロットに単層巻きで配置された、コイルと、を備え、前記コイルは、バックヨーク側からコア側に位置をずらしながららせん状に巻き付けられる第１コイルセグメントと、コア側からバックヨーク側に位置をずらしながららせん状に巻き付けられる第２コイルセグメントとのロータ側の端部同士が接合されて形成され、前記第１コイルセグメントと前記第２コイルセグメントとは、軸方向一方側の第１コイルエンド部において、高さを変えて交差して配置され、軸方向他方側の第２コイルエンド部において、ロータ側とバックヨーク側の間に交互に配置されているモータが提供される。 According to the present disclosure, a motor is provided that includes a stator core, a plurality of slots arranged in the circumferential direction of the stator core, and coils arranged in a single layer in the slots, the coils being formed by joining rotor-side ends of a first coil segment that is wound in a spiral shape while shifting its position from the back yoke side to the core side, and a second coil segment that is wound in a spiral shape while shifting its position from the core side to the back yoke side, the first coil segment and the second coil segment being arranged crosswise at different heights in a first coil end portion on one axial side, and being arranged alternately between the rotor side and the back yoke side in a second coil end portion on the other axial side.
　本開示に従えば、ステータコアの周方向に配置された複数のスロットに単層巻きで配置される、コイルの巻き付け方法であって、前記コイルの第１コイルセグメントを、バックヨーク側からコア側に位置をずらしながららせん状に巻き付けて、前記コイルの第２コイルセグメントを、コア側からバックヨーク側に位置をずらしながららせん状に巻き付けて、前記第１コイルセグメントと前記第２コイルセグメントとが、軸方向一方側の第１コイルエンド部において、高さを変えて交差させて配置し、軸方向他方側の第２コイルエンド部において、ロータ側とバックヨーク側の間に交互に配置することと、前記第１コイルセグメントと前記第２コイルセグメントのロータ側の端部同士を接合することと、を含む、コイルの巻き付け方法が提供される。 In accordance with the present disclosure, there is provided a method for winding a coil in a single layer around a plurality of slots arranged in the circumferential direction of a stator core, the method including: winding a first coil segment of the coil in a spiral shape while shifting its position from the back yoke side to the core side; winding a second coil segment of the coil in a spiral shape while shifting its position from the core side to the back yoke side; arranging the first coil segment and the second coil segment crossing each other at different heights at a first coil end portion on one axial side; and arranging them alternately between the rotor side and the back yoke side at a second coil end portion on the other axial side; and joining the rotor side ends of the first coil segment and the second coil segment.
　本開示によれば、耐振性を向上したモータ及びコイルの巻き付け方法が提供される。 This disclosure provides a motor and coil winding method with improved vibration resistance.
図１は、実施形態に係るモータを模式的に示す図である。FIG. 1 is a diagram illustrating a motor according to an embodiment. 図２は、実施形態に係るステータコア及びコイルを模式的に示す平面図である。FIG. 2 is a plan view illustrating a stator core and a coil according to the embodiment. 図３は、実施形態に係るコイルの概略を示す側面図である。FIG. 3 is a side view showing an outline of the coil according to the embodiment. 図４は、実施形態に係るコイルの概略を示す平面図である。FIG. 4 is a plan view showing an outline of the coil according to the embodiment. 図５は、実施形態に係るコイルの概略を示す正面図である。FIG. 5 is a front view showing an outline of the coil according to the embodiment. 図６は、実施形態に係るコイルの概略を示す側面図である。FIG. 6 is a side view showing an outline of the coil according to the embodiment. 図７は、実施形態に係るコイルの概略を示す斜視図である。FIG. 7 is a perspective view showing an outline of a coil according to an embodiment. 図８は、変形例に係るコイルの概略を示す正面図である。FIG. 8 is a front view showing an outline of a coil according to a modified example.
　以下、本開示に係る実施形態について図面を参照しながら説明するが、本発明はこれに限定されない。以下で説明する実施形態の構成要素は、適宜組み合わせることができる。また、一部の構成要素を用いない場合もある。 Below, an embodiment of the present disclosure will be described with reference to the drawings, but the present invention is not limited thereto. The components of the embodiments described below can be combined as appropriate. Also, some components may not be used.
［実施形態］
＜モータ＞
　図１は、実施形態に係るモータ１を模式的に示す図である。実施形態において、モータ１は、３相のスイッチトリラクタンスモータである。モータ１は、円筒形状のステータ２と、ステータ２の内側に配置されたロータ３とを備える。ステータ２は、円筒形状のステータコア４と、ステータコア４に支持されるコイル５とを有する。ステータ２の内周面とロータ３の外周面とは間隔を空けて対向する。ロータ３は、ステータコア４に対向する。ロータ３は、回転軸ＡＸを中心に回転する。ロータ３の回転軸ＡＸとステータ２の中心軸とは同一である。ロータ３は、シャフト８を介して対象物Ｅに接続される。対象物Ｅは、例えば、建設機械の一種であるハイブリッドショベルに搭載されるエンジンである。モータ１は、エンジンによって駆動される発電機として機能する。 [Embodiment]
<Motor>
FIG. 1 is a diagram showing a motor 1 according to an embodiment. In the embodiment, the motor 1 is a three-phase switched reluctance motor. The motor 1 includes a cylindrical stator 2 and a rotor 3 arranged inside the stator 2. The stator 2 has a cylindrical stator core 4 and a coil 5 supported by the stator core 4. The inner peripheral surface of the stator 2 and the outer peripheral surface of the rotor 3 face each other with a gap therebetween. The rotor 3 faces the stator core 4. The rotor 3 rotates about a rotation axis AX. The rotation axis AX of the rotor 3 and the central axis of the stator 2 are the same. The rotor 3 is connected to an object E via a shaft 8. The object E is, for example, an engine mounted on a hybrid excavator, which is a type of construction machine. The motor 1 functions as a generator driven by the engine.
　以下の説明において、回転軸ＡＸと平行な方向を軸方向という。軸方向における一方側を軸方向一方側といい、軸方向一方側の反対側を軸方向他方側という。また、回転軸ＡＸの周囲を周回する方向を周方向という。周方向おける回転方向の一方側を周方向一方側といい、周方向一方側の反対側を周方向他方側という。さらに、回転軸ＡＸの放射方向を径方向という。径方向において中心軸ＡＸから離れる方向側を径方向外側といい、径方向外側の反対側を径方向内側という。 In the following explanation, the direction parallel to the rotation axis AX is referred to as the axial direction. One side in the axial direction is referred to as the one axial side, and the opposite side of the one axial side is referred to as the other axial side. Furthermore, the direction going around the rotation axis AX is referred to as the circumferential direction. One side of the rotation direction in the circumferential direction is referred to as the one circumferential side, and the opposite side of the one circumferential side is referred to as the other circumferential side. Furthermore, the radial direction of the rotation axis AX is referred to as the radial direction. The side in the radial direction that is away from the central axis AX is referred to as the radial outer side, and the opposite side of the radial outer side is referred to as the radial inner side.
　ロータ３は、ステータコア４と対向可能に配置される。ロータ３は、ロータホルダ６と、ロータホルダ６に保持されるロータコア７とを有する。ロータホルダ６は、非磁性体で形成される。ロータコア７は、磁性体で形成される。 The rotor 3 is arranged so that it can face the stator core 4. The rotor 3 has a rotor holder 6 and a rotor core 7 held by the rotor holder 6. The rotor holder 6 is made of a non-magnetic material. The rotor core 7 is made of a magnetic material.
　ステータコア４は、コイル５を収容するスロット９を有する。スロット９は、ステータコア４の内周面から径方向外側に凹んだ凹部である。スロット９は、ステータコア４の内周面において周方向に複数配置される。スロット９は、軸方向に延在する。スロット９は、ステータコア４の内周面に配置されている。スロット９は、軸方向一方側及び軸方向他方側と、径方向内側とに向かって開口している。 The stator core 4 has slots 9 that accommodate the coils 5. The slots 9 are recesses that are recessed radially outward from the inner peripheral surface of the stator core 4. Multiple slots 9 are arranged circumferentially on the inner peripheral surface of the stator core 4. The slots 9 extend in the axial direction. The slots 9 are arranged on the inner peripheral surface of the stator core 4. The slots 9 are open toward one axial side, the other axial side, and toward the radially inward direction.
　ステータコア４は、周方向において隣接するスロット９の間に配置された、複数のティース１０を有する。ティース１０は、ステータコア４におけるコイル５が巻回される部分である。ティース１０は、コイル５を支持する。ティース１０は、コイル５の開口に挿入される。 The stator core 4 has multiple teeth 10 arranged between adjacent slots 9 in the circumferential direction. The teeth 10 are the portions of the stator core 4 around which the coils 5 are wound. The teeth 10 support the coils 5. The teeth 10 are inserted into the openings of the coils 5.
＜コイル＞
　図３は、実施形態に係るコイルの概略を示す側面図である。図４は、実施形態に係るコイルの概略を示す平面図である。図５は、実施形態に係るコイルの概略を示す正面図である。図６は、実施形態に係るコイルの概略を示す側面図である。図７は、実施形態に係るコイルの概略を示す斜視図である。各図では、説明のためにコイルの巻き数を簡素化し、導体の厚さを厚くして図示している。図４ないし図５、図７では、周方向を円弧状ではなく模式的に直線状にして図示している。 <Coil>
Fig. 3 is a side view showing an outline of the coil according to the embodiment. Fig. 4 is a plan view showing an outline of the coil according to the embodiment. Fig. 5 is a front view showing an outline of the coil according to the embodiment. Fig. 6 is a side view showing an outline of the coil according to the embodiment. Fig. 7 is a perspective view showing an outline of the coil according to the embodiment. In each figure, the number of turns of the coil is simplified and the thickness of the conductor is increased for the purpose of explanation. In Figs. 4 to 5 and 7, the circumferential direction is illustrated as being not circular but generally linear.
　コイル５は、ティース１０の周囲に配置される。コイル５は、ティース１０に支持される。コイル５は、開口を有する。コイル５の開口に、ティース１０が挿入される。 The coil 5 is arranged around the teeth 10. The coil 5 is supported by the teeth 10. The coil 5 has an opening. The teeth 10 are inserted into the opening of the coil 5.
　コイル５は、コイル本体部５１とコイルエンド部５２とコイルエンド部５３とを含む。コイル５のうちスロット１０に収容される部分がコイル本体部５１である。コイル５のうちステータコア４から軸方向一方側に突出する部分がコイルエンド部５２である。コイル５のうちステータコア４から軸方向他方側に突出する部分がコイルエンド部５３である。 The coil 5 includes a coil body portion 51, a coil end portion 52, and a coil end portion 53. The portion of the coil 5 that is accommodated in the slot 10 is the coil body portion 51. The portion of the coil 5 that protrudes from the stator core 4 to one side in the axial direction is the coil end portion 52. The portion of the coil 5 that protrudes from the stator core 4 to the other side in the axial direction is the coil end portion 53.
　コイル５は、例えば、平角線、丸線、又は、板状のセグメント導体等の線状又は帯状の導体により構成される。コイル５は、螺旋状に配置された導体により構成される。コイル５は、１本の導体を螺旋状に巻き付けて構成されてもよいし、複数の導体を螺旋状に接続して構成されてもよい。コイル５の巻付け方法及び接続方法は限定されない。 The coil 5 is composed of a linear or band-shaped conductor, such as a rectangular wire, a round wire, or a plate-shaped segment conductor. The coil 5 is composed of a conductor arranged in a spiral shape. The coil 5 may be composed of a single conductor wound in a spiral shape, or may be composed of multiple conductors connected in a spiral shape. The winding method and connection method of the coil 5 are not limited.
　コイル５は、Ｕ相コイル（第１相コイル）５Ｕと、Ｖ相コイル（第２相コイル）５Ｖと、Ｗ相コイル（第３相コイル）５Ｗとを含む。 The coil 5 includes a U-phase coil (first phase coil) 5U, a V-phase coil (second phase coil) 5V, and a W-phase coil (third phase coil) 5W.
　コイル５は、スロット９内では単層巻きで、コイルエンド５２では部分的に交差して２層となる部分がある。コイル５は、一部がスロット９に収容されて、ティース１０によって支持される。 The coil 5 is wound in a single layer within the slot 9, but at the coil end 52 it partially crosses over to form two layers. A portion of the coil 5 is housed in the slot 9 and is supported by the teeth 10.
　コイル５は、バックヨーク側からコア側に向かってティース１０に巻き付けられている第１コイルセグメント５Ｆと、コア側からバックヨーク側に向かってティース１０に巻き付けられている第２コイルセグメント５Ｒとが接合されて形成される。より詳しくは、コイル５は、バックヨーク側からコア側に位置をずらしながららせん状に巻き付けられる第１コイルセグメント５Ｆと、コア側からバックヨーク側に位置をずらしながららせん状に巻き付けられる第２コイルセグメント５Ｒとのロータ側の端部同士が接合されて形成される。 The coil 5 is formed by joining a first coil segment 5F wound around the teeth 10 from the back yoke side toward the core side, and a second coil segment 5R wound around the teeth 10 from the core side toward the back yoke side. More specifically, the coil 5 is formed by joining the rotor-side ends of the first coil segment 5F wound in a spiral shape while shifting its position from the back yoke side to the core side, and the second coil segment 5R wound in a spiral shape while shifting its position from the core side to the back yoke side.
　第１コイルセグメント５Ｆ１は、下セグメント導体５ＦＤ１と、上セグメント導体５ＦＵ１とが圧接により接合されて形成されている。周方向一方側において、下セグメント導体５ＦＤ１の軸方向一方側の端部と、上セグメント導体５ＦＵ１の軸方向他方側の端部とが接合されている。下セグメント導体５ＦＤ１は、Ｕ字形状のセグメント導体である。下セグメント導体５ＦＤ１は、巻き付け方向におけるねじれを有していない。上セグメント導体５ＦＵ１は、Ｕ字形状のセグメント導体である。上セグメント導体５ＦＵ１は、軸方向一方側においてティース１０上に位置する。上セグメント導体５ＦＵ１は、巻き付け方向におけるねじれを有している。上セグメント導体５ＦＵ１は、曲げ部５ＦＵ１ａと、曲げ部５ＦＵ１ｂとにおいて曲げられている。上セグメント導体５ＦＵ１の周方向一方側は、周方向他方側よりもロータ側に位置する。周方向他方側において、上セグメント導体５ＦＵ１の軸方向他方側の端部は、第１コイルセグメント５Ｆ２の下セグメント導体５ＦＤ２の軸方向一方側の端部と接合されている。 The first coil segment 5F1 is formed by joining a lower segment conductor 5FD1 and an upper segment conductor 5FU1 by pressure welding. On one circumferential side, an end portion on one axial side of the lower segment conductor 5FD1 and an end portion on the other axial side of the upper segment conductor 5FU1 are joined. The lower segment conductor 5FD1 is a U-shaped segment conductor. The lower segment conductor 5FD1 has no twist in the winding direction. The upper segment conductor 5FU1 is a U-shaped segment conductor. The upper segment conductor 5FU1 is located on the tooth 10 on one axial side. The upper segment conductor 5FU1 has a twist in the winding direction. The upper segment conductor 5FU1 is bent at a bent portion 5FU1a and a bent portion 5FU1b. One circumferential side of the upper segment conductor 5FU1 is located closer to the rotor than the other circumferential side. On the other circumferential side, the other axial end of the upper segment conductor 5FU1 is joined to one axial end of the lower segment conductor 5FD2 of the first coil segment 5F2.
　第１コイルセグメント５Ｆ２は、下セグメント導体５ＦＤ２と、上セグメント導体５ＦＵ２とが接合されて形成されている。下セグメント導体５ＦＤ２は、下セグメント導体５ＦＤ１と同様に構成されている。上セグメント導体５ＦＵ２は、上セグメント導体５ＦＵ１と同様に構成されている。周方向一方側において、下セグメント導体５ＦＤ２の軸方向一方側の端部と、上セグメント導体５ＦＵ２の軸方向他方側の端部とが接合されている。周方向他方側において、第１コイルセグメント５Ｆ１の上セグメント導体５ＦＵ２の軸方向他方側の端部は、下セグメント導体５ＦＤ３の軸方向一方側の端部と接合されている。 The first coil segment 5F2 is formed by joining a lower segment conductor 5FD2 and an upper segment conductor 5FU2. The lower segment conductor 5FD2 is configured similarly to the lower segment conductor 5FD1. The upper segment conductor 5FU2 is configured similarly to the upper segment conductor 5FU1. On one circumferential side, an end portion on one axial side of the lower segment conductor 5FD2 is joined to an end portion on the other axial side of the upper segment conductor 5FU2. On the other circumferential side, an end portion on the other axial side of the upper segment conductor 5FU2 of the first coil segment 5F1 is joined to an end portion on one axial side of the lower segment conductor 5FD3.
　第１コイルセグメント５Ｆ３は、下セグメント導体５ＦＤ３である。周方向他方側において、下セグメント導体５ＦＤ３の軸方向一方側の端部は、第１コイルセグメント５Ｆ２の上セグメント導体５ＦＵ２の軸方向他方側の端部と接合されている。 The first coil segment 5F3 is a lower segment conductor 5FD3. On the other circumferential side, one end of the lower segment conductor 5FD3 in the axial direction is joined to the other end of the upper segment conductor 5FU2 of the first coil segment 5F2 in the axial direction.
　第１コイルセグメント５Ｆの巻き始めは、第１コイルセグメント５Ｆ３の下セグメント導体５ＦＤ３である。周方向一方側において、下セグメント導体５ＦＤ３は、軸方向一方側が渡り線５５Ｆと接合されている。 The winding of the first coil segment 5F begins at the lower segment conductor 5FD3 of the first coil segment 5F3. On one circumferential side, the lower segment conductor 5FD3 is joined on one axial side to the jumper wire 55F.
　第１コイルセグメント５Ｆのバックヨーク側の端部は、渡り線５５Ｆである。 The end of the first coil segment 5F on the back yoke side is a jumper wire 55F.
　第２コイルセグメント５Ｒ１は、上セグメント導体５ＲＵ１と、下セグメント導体５ＲＤ１とが接合されて形成されている。周方向一方側において、上セグメント導体５ＲＵ１の軸方向他方側の端部と、下セグメント導体５ＲＤ１の軸方向一方側の端部とが接合されている。上セグメント導体５ＲＵ１は、軸方向一方側において第１コイルセグメント５Ｆの上セグメント導体５ＦＵ１上に位置する。上セグメント導体５ＲＵ１は、Ｕ字形状のセグメント導体である。上セグメント導体５ＲＵ１は、巻き付け方向におけるねじれを有している。上セグメント導体５ＲＵ１は、曲げ部５ＲＵ１ａと、曲げ部５ＲＵ１ｂとにおいて曲げられている。上セグメント導体５ＲＵ１の周方向他方側は、周方向一方側よりもロータ側に位置する。周方向他方側において、下セグメント導体５ＲＤ１の軸方向一方側の端部は、第２コイルセグメント５Ｒ２の上セグメント導体５ＲＵ２の軸方向他方側の端部と接合されている。下セグメント導体５ＲＤ１は、Ｕ字形状のセグメント導体である。下セグメント導体５ＲＤ１は、巻き付け方向におけるねじれを有していない。 The second coil segment 5R1 is formed by joining an upper segment conductor 5RU1 and a lower segment conductor 5RD1. On one circumferential side, the end of the upper segment conductor 5RU1 on the other axial side and the end of the lower segment conductor 5RD1 on one axial side are joined. The upper segment conductor 5RU1 is located on the upper segment conductor 5FU1 of the first coil segment 5F on one axial side. The upper segment conductor 5RU1 is a U-shaped segment conductor. The upper segment conductor 5RU1 has a twist in the winding direction. The upper segment conductor 5RU1 is bent at the bending portion 5RU1a and the bending portion 5RU1b. The other circumferential side of the upper segment conductor 5RU1 is located closer to the rotor than the one circumferential side. On the other circumferential side, the end of the lower segment conductor 5RD1 on one axial side is joined to the end of the upper segment conductor 5RU2 on the other axial side of the upper segment conductor 5RU2 of the second coil segment 5R2. The lower segment conductor 5RD1 is a U-shaped segment conductor. The lower segment conductor 5RD1 does not have a twist in the winding direction.
　第２コイルセグメント５Ｒ２は、上セグメント導体５ＲＵ２と、下セグメント導体５ＲＤ２とが接合されて形成されている。上セグメント導体５ＲＵ２は、上セグメント導体５ＲＵ１と同様に構成されている。下セグメント導体５ＲＤ２は、下セグメント導体５ＲＤ１と同様に構成されている。周方向他方側において、第２コイルセグメント５Ｒ１の下セグメント導体５ＲＤ２は、軸方向他方側の端部が渡り線５５Ｒと接合されている。周方向一方側において、上セグメント導体５ＲＵ２の軸方向他方側の端部と、下セグメント導体５ＲＤ２の軸方向一方側の端部とが接合されている。 The second coil segment 5R2 is formed by joining an upper segment conductor 5RU2 and a lower segment conductor 5RD2. The upper segment conductor 5RU2 is configured similarly to the upper segment conductor 5RU1. The lower segment conductor 5RD2 is configured similarly to the lower segment conductor 5RD1. On the other circumferential side, the other axial end of the lower segment conductor 5RD2 of the second coil segment 5R1 is joined to the jumper wire 55R. On one circumferential side, the other axial end of the upper segment conductor 5RU2 is joined to one axial end of the lower segment conductor 5RD2.
　第２コイルセグメント５Ｒの巻き始めは、第１コイルセグメント５Ｒ１の上セグメント導体５ＲＵ１である。 The second coil segment 5R begins winding at the upper segment conductor 5RU1 of the first coil segment 5R1.
　第２コイルセグメント５Ｒのバックヨーク側の端部は、渡り線５５Ｒである。 The end of the second coil segment 5R on the back yoke side is a jumper wire 55R.
　径方向内側かつ周方向他方側において、第１コイルセグメント５Ｒ１の上セグメント導体５ＲＵ１の軸方向他方側は、第１コイルセグメント５Ｆ１の下セグメント導体５ＦＤ１の軸方向一方側と接合されている。 On the radially inner side and the other circumferential side, the other axial side of the upper segment conductor 5RU1 of the first coil segment 5R1 is joined to one axial side of the lower segment conductor 5FD1 of the first coil segment 5F1.
　第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、軸方向一方側においての第１コイルエンド部５２において、高さを変えて交差して配置されている。言い換えると、第２コイルセグメント５Ｒの上セグメント導体５ＲＵは、軸方向一方側において第１コイルセグメント５Ｆの上セグメント導体５ＦＵ上に位置する。 The first coil segment 5F and the second coil segment 5R are arranged crosswise at different heights in the first coil end portion 52 on one axial side. In other words, the upper segment conductor 5RU of the second coil segment 5R is located above the upper segment conductor 5FU of the first coil segment 5F on one axial side.
　第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、軸方向他方側の第２コイルエンド部５２において、ロータ側とバックヨーク側の間に交互に配置されている。言い換えると、第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、軸方向他方側の第２コイルエンド部５２において、交差していない。 The first coil segment 5F and the second coil segment 5R are arranged alternately between the rotor side and the back yoke side at the second coil end portion 52 on the other axial side. In other words, the first coil segment 5F and the second coil segment 5R do not intersect at the second coil end portion 52 on the other axial side.
　コイル５の第１コイルエンド部５２の軸方向のコイル幅は、第１コイルエンド部５２における第１コイルセグメント５Ｆのコイル幅ｗ１と第２コイルセグメント５Ｒのコイル幅ｗ２と、それらの間の隙間の和である。 The axial coil width of the first coil end portion 52 of the coil 5 is the sum of the coil width w1 of the first coil segment 5F at the first coil end portion 52, the coil width w2 of the second coil segment 5R, and the gap between them.
　コイル５の第２コイルエンド部５２の軸方向のコイル幅ｗ３は、第２コイルエンド部５２における第１コイルセグメント５Ｆのコイル幅ｗ１と第２コイルセグメント５Ｒのコイル幅ｗ２と同じである。 The axial coil width w3 of the second coil end portion 52 of the coil 5 is the same as the coil width w1 of the first coil segment 5F and the coil width w2 of the second coil segment 5R at the second coil end portion 52.
　第１コイルエンド部５２の軸方向のコイル幅は、第２コイルエンド部５２の軸方向のコイル幅より広い。 The axial coil width of the first coil end portion 52 is wider than the axial coil width of the second coil end portion 52.
＜巻き付け方法＞
　ステータコア４の周方向に配置された複数のスロット９に単層巻きで配置される、コイル５の巻き付け方法を説明する。 <Winding method>
A method of winding the coils 5, which are arranged in a single layer in the multiple slots 9 arranged in the circumferential direction of the stator core 4, will be described.
　コイル５の第１コイルセグメント５Ｆを、バックヨーク側からコア側に位置をずらしながららせん状に巻き付ける。第１コイルセグメント５Ｆは、バックヨーク側からコア側に向かって、下セグメント導体５ＦＤと上セグメント導体５ＦＵとを順番に接合して形成される。コイル５の第２コイルセグメント５Ｒを、コア側からバックヨーク側に位置をずらしながららせん状に巻き付ける。第２コイルセグメント５Ｒは、コア側からバックヨーク側に向かって、上セグメント導体５ＦＵと下セグメント導体５ＦＤとを順番に接合して形成される。 The first coil segment 5F of the coil 5 is wound in a spiral shape while shifting its position from the back yoke side to the core side. The first coil segment 5F is formed by joining the lower segment conductor 5FD and the upper segment conductor 5FU in order from the back yoke side to the core side. The second coil segment 5R of the coil 5 is wound in a spiral shape while shifting its position from the core side to the back yoke side. The second coil segment 5R is formed by joining the upper segment conductor 5FU and the lower segment conductor 5FD in order from the core side to the back yoke side.
　先に、第１コイルセグメント５Ｆを巻き付けた後、第２コイルセグメント５Ｒを巻き付ける。これにより、第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、第１コイルエンド部５２において、高さを変えて交差させて配置される。第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、第２コイルエンド部５３において、ロータ側とバックヨーク側の間に交互に配置される。 First, the first coil segment 5F is wound, and then the second coil segment 5R is wound. As a result, the first coil segment 5F and the second coil segment 5R are arranged crossing each other at different heights in the first coil end portion 52. The first coil segment 5F and the second coil segment 5R are arranged alternately between the rotor side and the back yoke side in the second coil end portion 53.
　第１コイルセグメント５Ｆと第２コイルセグメント５Ｒのロータ側の端部同士を接合する。このようにして、コイル５が巻回される。 The rotor side ends of the first coil segment 5F and the second coil segment 5R are joined together. In this manner, the coil 5 is wound.
＜効果＞
　以上説明したように、実施形態では、コイル５は、バックヨーク側からコア側に位置をずらしながららせん状に巻き付けられる第１コイルセグメント５Ｆと、コア側からバックヨーク側に位置をずらしながららせん状に巻き付けられる第２コイルセグメント５Ｒとのロータ側の端部同士が接合されて形成される。実施形態では、第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、軸方向一方側の第１コイルエンド部５２において、高さを変えて交差して配置され、軸方向他方側の第２コイルエンド部５３において、ロータ側とバックヨーク側の間に交互に配置されている。実施形態では、第１コイルセグメント５Ｆのバックヨーク側の端部と、第２コイルセグメント５Ｒのバックヨーク側の端部は、渡り線５５Ｆ、渡り線５５Ｒである。実施形態によれば、コイル５の巻き終わりが、いずれもバックヨーク側に位置するようにすることができる。実施形態によれば、渡り線５５の長さを抑えることができる。実施形態によれば、振動を抑えられるので、耐振性を向上することができる。実施形態は、渡り線の長さを抑えることができるので、渦電流による損失を低減することができる。 ＜Effects＞
As described above, in the embodiment, the coil 5 is formed by joining the rotor-side ends of the first coil segment 5F, which is wound in a spiral shape while shifting its position from the back yoke side to the core side, and the second coil segment 5R, which is wound in a spiral shape while shifting its position from the core side to the back yoke side. In the embodiment, the first coil segment 5F and the second coil segment 5R are arranged crossing each other at different heights in the first coil end portion 52 on one axial side, and are arranged alternately between the rotor side and the back yoke side in the second coil end portion 53 on the other axial side. In the embodiment, the back yoke side end of the first coil segment 5F and the back yoke side end of the second coil segment 5R are crossover wires 55F and 55R. According to the embodiment, the winding ends of the coil 5 can both be located on the back yoke side. According to the embodiment, the length of the crossover wire 55 can be reduced. According to the embodiment, vibration can be reduced, so vibration resistance can be improved. According to the embodiment, the length of the crossover wire can be reduced, so loss due to eddy current can be reduced.
　実施形態では、第１コイルエンド部５２において、第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとが交差する部分では、上セグメント導体５ＲＵ１は、第１コイルセグメント５Ｆの上セグメント導体５ＦＵ１の軸方向一方側に位置する。実施形態によれば、コイル５の巻き終わりを、いずれもロータ側に位置するようにすることができる。 In the embodiment, in the first coil end portion 52, at the portion where the first coil segment 5F and the second coil segment 5R intersect, the upper segment conductor 5RU1 is located on one axial side of the upper segment conductor 5FU1 of the first coil segment 5F. According to the embodiment, the winding ends of the coil 5 can both be located on the rotor side.
　実施形態では、コイル５の第１コイルエンド部５２の軸方向のコイル幅は、第１コイルエンド部５２における第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとのコイル幅の和である。コイル５の第２コイルエンド部５３の軸方向のコイル幅は、第２コイルエンド部５２における第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとのコイル幅と同じである。実施形態によれば、コイル５をコイル幅が一定のセグメント導体で形成することができる。実施形態によれば、簡易な構成にすることができる。 In the embodiment, the axial coil width of the first coil end portion 52 of the coil 5 is the sum of the coil widths of the first coil segment 5F and the second coil segment 5R at the first coil end portion 52. The axial coil width of the second coil end portion 53 of the coil 5 is the same as the coil widths of the first coil segment 5F and the second coil segment 5R at the second coil end portion 52. According to the embodiment, the coil 5 can be formed from a segment conductor with a constant coil width. According to the embodiment, a simple configuration can be achieved.
　実施形態では、第１コイルエンド部５２の軸方向のコイル幅は、第２コイルエンド部５３の軸方向のコイル幅より広い。実施形態によれば、第２コイルエンド部５３の軸方向を小型化することができる。 In the embodiment, the coil width in the axial direction of the first coil end portion 52 is wider than the coil width in the axial direction of the second coil end portion 53. According to the embodiment, the axial direction of the second coil end portion 53 can be made smaller.
　実施形態によれば、追加部材を用いずに、振動を抑えることができる。実施形態は、部品点数を増やすことなく、振動を抑えることができる。 According to the embodiment, vibrations can be suppressed without using additional components. The embodiment can suppress vibrations without increasing the number of parts.
［変形例］
　図８を用いて、コイルの変形例について説明する。図８は、変形例に係るコイルの概略を示す正面図である。図８に示す例では、第１コイルセグメント５Ｆと第２コイルセグメント５Ｒとは、第１コイルエンド部５２におけるコイル幅ｗ１、コイル幅ｗ２が、他の部分より狭くなっている。第１コイルエンド部５２の軸方向のコイル幅は、第２コイルエンド部５３の軸方向のコイル幅ｗ３と同じである。 [Modification]
A modified coil will be described with reference to Fig. 8. Fig. 8 is a front view showing an outline of a coil according to the modified example. In the example shown in Fig. 8, the coil widths w1 and w2 of the first coil end portion 52 of the first coil segment 5F and the second coil segment 5R are narrower than the other portions. The coil width in the axial direction of the first coil end portion 52 is the same as the coil width w3 in the axial direction of the second coil end portion 53.
＜効果＞
　以上説明したように、変形例によれば、第１コイルエンド部５２のコイル幅を縮小することができる。変形例によれば、軸方向を小型化することができる。 ＜Effects＞
As described above, according to the modified example, it is possible to reduce the coil width of the first coil end portion 52. According to the modified example, it is possible to reduce the size in the axial direction.
　上述の実施形態においては、セグメント導体同士の接合方法は圧接を例に挙げたが、これに限られず、溶接でもよいし加締め等別の方法でもよい。 In the above embodiment, the segment conductors are joined by crimping as an example, but this is not limited to this and other methods such as welding or crimping may also be used.
　上述の実施形態において、ロータ３がステータコア４の内側（内周側）に配置され、モータ１がインナロータ側モータであることとした。ロータ３はステータコア４に対向する位置に配置されていればよい。モータ１は、ロータ３がステータコア４の外周側に配置されるアウタロータ型モータでもよいし、ロータ３がステータコア４の内周側及び外周側の両方に配置されるデュアルロータ型モータでもよいし、ロータ３がステータコア４の軸方向側に配置されるアキシャルギャップ型モータでもよい。 In the above embodiment, the rotor 3 is arranged inside (on the inner circumference side) of the stator core 4, and the motor 1 is an inner rotor motor. The rotor 3 only needs to be arranged in a position facing the stator core 4. The motor 1 may be an outer rotor type motor in which the rotor 3 is arranged on the outer circumference side of the stator core 4, a dual rotor type motor in which the rotor 3 is arranged on both the inner and outer circumference sides of the stator core 4, or an axial gap type motor in which the rotor 3 is arranged on the axial side of the stator core 4.
　なお、上述の実施形態においては、モータ１がスイッチトリラクタンスモータであることとした。モータ１はシンクロナスリラクタンスモータ（Synchronous　Reluctance　Motor）でもよいし、フラックススイッチングモータ（Flux　Switching　Motor）でもよいし、永久磁石モータ（Permanent　Magnet　Motor）でもよいし、誘導モータ（Induction　Motor）でもよいし、アキシャルギャップモータでもよいし、リニアアクチュエータでもよい。 In the above embodiment, the motor 1 is a switched reluctance motor. The motor 1 may be a synchronous reluctance motor, a flux switching motor, a permanent magnet motor, an induction motor, an axial gap motor, or a linear actuator.
　１…モータ、２…ステータ、３…ロータ、４…ステータコア、５…コイル、５Ａ…Ａ相コイル、５Ｂ…Ｂ相コイル、５Ｃ…Ｃ相コイル、５Ｆ…第１コイルセグメント、５ＦＤ１…下セグメント導体、５ＦＵ…上セグメント導体、５Ｒ…第２コイルセグメント、５RＤ１…下セグメント導体、５ＦＵ…上セグメント導体、５Ｕ…Ｕ相コイル（第１相コイル）、５Ｖ…Ｖ相コイル（第２相コイル）、５Ｗ…Ｗ相コイル（第３相コイル）、６…ロータホルダ、７…ロータコア、８…シャフト、９…スロット、１０…ティース、５１…コイル本体部、５２…コイルエンド部、５３…コイルエンド部、５５…渡り線、５５Ｆ…渡り線、５５Ｒ…渡り線、５６…端子部、５７…渡り線、５８…端子部、ＡＸ…回転軸、Ｅ…対象物。 1...motor, 2...stator, 3...rotor, 4...stator core, 5...coil, 5A...A-phase coil, 5B...B-phase coil, 5C...C-phase coil, 5F...first coil segment, 5FD1...lower segment conductor, 5FU...upper segment conductor, 5R...second coil segment, 5RD1...lower segment conductor, 5FU...upper segment conductor, 5U...U-phase coil (first phase coil), 5V...V-phase coil (second phase coil), 5W...W-phase coil (third phase coil), 6...rotor holder, 7...rotor core, 8...shaft, 9...slot, 10...teeth, 51...coil body, 52...coil end, 53...coil end, 55...crossover, 55F...crossover, 55R...crossover, 56...terminal, 57...crossover, 58...terminal, AX...rotating shaft, E...object.

Claims (8)

  1. 　ステータコアと、
    　前記ステータコアの周方向に配置された複数のスロットと、
    　前記スロットに単層巻きで配置された、コイルと、
    　を備え、
    　前記コイルは、バックヨーク側からコア側に位置をずらしながららせん状に巻き付けられる第１コイルセグメントと、コア側からバックヨーク側に位置をずらしながららせん状に巻き付けられる第２コイルセグメントとのロータ側の端部同士が接合されて形成され、
    　前記第１コイルセグメントと前記第２コイルセグメントとは、軸方向一方側の第１コイルエンド部において、高さを変えて交差して配置され、軸方向他方側の第２コイルエンド部において、ロータ側とバックヨーク側の間に交互に配置されている、
    　モータ。     A stator core;
    A plurality of slots arranged in a circumferential direction of the stator core;
    A coil disposed in the slot with a single layer winding;
    Equipped with
    The coil is formed by joining rotor-side ends of a first coil segment that is wound in a spiral shape while being shifted from the back yoke side to the core side, and a second coil segment that is wound in a spiral shape while being shifted from the core side to the back yoke side,
    The first coil segments and the second coil segments are arranged to cross each other at different heights in a first coil end portion on one axial side, and are arranged alternately between a rotor side and a back yoke side in a second coil end portion on the other axial side.
    Motor.
  2. 　前記第１コイルセグメントのバックヨーク側の端部と、前記第２コイルセグメントのバックヨーク側の端部は、渡り線である、
    　請求項１に記載のモータ。     An end portion of the first coil segment on the back yoke side and an end portion of the second coil segment on the back yoke side are crossover wires.
    2. The motor according to claim 1.
  3. 　前記第１コイルエンド部において、前記第１コイルセグメントと前記第２コイルセグメントとが交差する部分では、前記第２コイルセグメントは、前記第１コイルセグメントに対して軸方向一方側に位置する、
    　請求項１に記載のモータ。     In the first coil end portion, at a portion where the first coil segment and the second coil segment intersect, the second coil segment is located on one axial side of the first coil segment.
    2. The motor according to claim 1.
  4. 　前記第１コイルエンド部において、前記第１コイルセグメントと前記第２コイルセグメントとが交差する部分では、前記第１コイルセグメントと前記第２コイルセグメントとのどちらか一方が他方の軸方向一方側に位置する、
    　請求項１に記載のモータ。     In the first coil end portion, at a portion where the first coil segment and the second coil segment intersect, one of the first coil segment and the second coil segment is located on one axial side of the other.
    2. The motor according to claim 1.
  5. 　前記コイルの前記第１コイルエンド部の軸方向のコイル幅は、前記第１コイルエンド部における前記第１コイルセグメントのコイル幅と前記第２コイルセグメントのコイル幅と、前記第１コイルセグメントと前記第２コイルセグメントとの隙間との和である、
    　請求項１に記載のモータ。     an axial coil width of the first coil end portion of the coil is a sum of a coil width of the first coil segment and a coil width of the second coil segment at the first coil end portion, and a gap between the first coil segment and the second coil segment;
    2. The motor according to claim 1.
  6. 　前記第１コイルエンド部の軸方向のコイル幅は、前記第２コイルエンド部の軸方向のコイル幅より広い、
    　請求項３に記載のモータ。     The coil width in the axial direction of the first coil end portion is wider than the coil width in the axial direction of the second coil end portion.
    The motor according to claim 3.
  7. 　前記第１コイルセグメントと前記第２コイルセグメントとは、前記第１コイルエンド部におけるコイル幅が、他の部分より狭い
    　請求項４に記載のモータ。     The motor according to claim 4 , wherein the first coil segment and the second coil segment have a coil width narrower at the first coil end portion than at other portions.
  8. 　ステータコアの周方向に配置された複数のスロットに単層巻きで配置される、コイルの巻き付け方法であって、
    　前記コイルの第１コイルセグメントを、バックヨーク側からコア側に位置をずらしながららせん状に巻き付けて、前記コイルの第２コイルセグメントを、コア側からバックヨーク側に位置をずらしながららせん状に巻き付けて、前記第１コイルセグメントと前記第２コイルセグメントとが、軸方向一方側の第１コイルエンド部において、高さを変えて交差させて配置し、軸方向他方側の第２コイルエンド部において、ロータ側とバックヨーク側の間に交互に配置することと、
    　前記第１コイルセグメントと前記第２コイルセグメントのロータ側の端部同士を接合することと、
    　を含む、コイルの巻き付け方法。     A method for winding a coil in a single layer in a plurality of slots arranged in a circumferential direction of a stator core, comprising the steps of:
    a first coil segment of the coil is wound in a spiral shape while shifting its position from the back yoke side to the core side, and a second coil segment of the coil is wound in a spiral shape while shifting its position from the core side to the back yoke side, so that the first coil segment and the second coil segment are arranged to cross each other at different heights in a first coil end portion on one axial side, and are arranged alternately between the rotor side and the back yoke side in a second coil end portion on the other axial side;
    joining rotor-side ends of the first coil segment and the second coil segment to each other;
    A method for winding a coil, comprising:
PCT/JP2024/002563 2023-02-02 2024-01-29 Motor and coil winding method WO2024162233A1 (en)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
JP3652348B2 (en) * 2002-11-26 2005-05-25 株式会社モステック Coil, wire, wire manufacturing method, wire manufacturing device
JP2010531131A (en) * 2007-06-22 2010-09-16 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Electromagnetically excitable coil
WO2011001736A1 (en) * 2009-06-29 2011-01-06 トヨタ自動車株式会社 Multilayered wound coil, stator, and manufacturing method therefor
JP2020088932A (en) * 2018-11-16 2020-06-04 アイシン精機株式会社 Rotary electric machine stator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3652348B2 (en) * 2002-11-26 2005-05-25 株式会社モステック Coil, wire, wire manufacturing method, wire manufacturing device
JP2010531131A (en) * 2007-06-22 2010-09-16 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Electromagnetically excitable coil
WO2011001736A1 (en) * 2009-06-29 2011-01-06 トヨタ自動車株式会社 Multilayered wound coil, stator, and manufacturing method therefor
JP2020088932A (en) * 2018-11-16 2020-06-04 アイシン精機株式会社 Rotary electric machine stator

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