Axial gap type rotating electric machine

Patent metadata

Field	Value
Publication number	US-11050316-B2
Application number	US-201716099937-A
Country	US
Kind code	B2
Filing date	Jan 27, 2017
Priority date	Jan 27, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

There is provided an axial gap rotary electric machine which includes a stator in which a plurality of core units, the core units having a core, a winding disposed in an outer periphery of the core, and a bobbin disposed between the core and the winding, are arranged in an annular shape about a rotation shaft, at least one rotor which faces an end surface of the core in an axial direction through a gap, a rotation shaft which rotates together with the rotor, and a housing in which the stator and the rotor are stored. A wiring fixing member is provided in an end surface and on an outer side of the stator in the axial direction, and includes an outer wall and an inner wall extending in a circumferential direction along a circumferential outer shape of the stator. The stator includes a crossover wire which leads the winding from the core unit. The crossover wire is disposed between the outer wall and the inner wall of the wiring fixing member. At least a part of the end surface of the inner wall on a side near the stator in the axial direction abuts on the bobbin.

First claim

The invention claimed is:

1. An axial gap rotary electric machine, comprising:
a stator in which a plurality of core units, the core units having a core, a winding disposed in an outer periphery of the core, and a bobbin disposed between the core and the winding, are arranged in an annular shape about a rotation shaft;
at least one rotor which faces an end surface of the core in an axial direction through a gap; and
a housing in which the stator and the rotor are stored,
wherein the rotation shaft rotates together with the rotor,
wherein a wiring fixing member is provided in an end surface and on an outer side of the stator in the axial direction, and includes an outer wall and an inner wall extending in a circumferential direction along a circumferential outer shape of the stator,
the stator includes a crossover wire which leads the winding from the core unit,
the crossover wire is disposed between the outer wall and the inner wall of the wiring fixing member, and
at least a part of the end surface of the inner wall on a side near the stator in the axial direction abuts on the bobbin,
wherein a plurality of the wiring fixing members having different circumferential lengths are provided, and
wherein a wiring fixing member arranged near a lead portion is shorter in length in the circumferential direction than other wiring fixing members.

2. The axial gap rotary electric machine according to claim 1 ,
wherein the bobbin includes a hollow portion to which the core is inserted, and a flange which extends by a predetermined length in a direction perpendicular to an outer periphery of the core,
the wiring fixing member includes a projection which extends from the end surface of the outer wall on a side near the stator in the axial direction,
a concave portion dent in a radial direction is provided on an outer side of the flange in the radial direction, and
the projection and the concave portion are fitted.

3. The axial gap rotary electric machine according to claim 2 ,
wherein the projection includes a shaft portion which extends in the axial direction, and an engaging portion which intersects with the shaft portion and is thicker than a width of the shaft portion.

4. The axial gap rotary electric machine according to claim 2 ,
wherein the outer wall is thicker than the inner wall.

5. The axial gap rotary electric machine according to claim 1 ,
wherein the stator, the wiring fixing member, and the housing are fixed by resin, and
the inner wall and the outer wall of the wiring fixing member include a plurality of holes which pass through the inner and outer walls in the radial direction.

6. The axial gap rotary electric machine according to claim 1 ,
wherein the wiring fixing member is divided into plural parts in the circumferential direction, and
a circumferential length of one wiring fixing member is longer than a circumferential length of one core unit.

7. An axial gap rotary electric machine, comprising:
a stator in which a plurality of core units, the core units having a core, a winding disposed in an outer periphery of the core, and a bobbin disposed between the core and the winding, are arranged in an annular shape about a rotation shaft;
at least one rotor which faces an end surface of the core in an axial direction through a gap;
a rotation shaft which rotates together with the rotor; and
a housing in which the stator and the rotor are stored,
wherein the stator includes a crossover wire which leads the winding from the core unit,
a wiring fixing member is provided in an end surface and on an outer side of the stator in the axial direction, and includes a hollow portion which stores the crossover wire, and
a circumferential length of the wiring fixing member is longer than a circumferential length of the core unit,
wherein a plurality of the wiring fixing members having different circumferential lengths are provided.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• YONEOKA Yasuei
• Takahashi Shuuichi
• Suzuki Toshifumi
• Yamazaki Katsuyuki
• Takahashi Daisaku
• Kurai Daisuke
• Sakurai Jun

Classifications

• H02K2203/06

  Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02K1/148

  Sectional cores (H02K1/141 takes precedence) · CPC title