Axial gap type rotary electric machine

Patent metadata

Field	Value
Publication number	US-10992203-B2
Application number	US-201616097738-A
Country	US
Kind code	B2
Filing date	May 18, 2016
Priority date	May 18, 2016
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

The purpose of the present invention is to ensure reliability and installation space reduction of crossover wires of an axial gap type rotary electric machine. An axial gap type rotary electric machine having: a stator which is constructed by annularly arranging multiple core units about an axis of rotation, each of the core units having at least a core, windings disposed around the outer periphery of the core, and crossover wires leading out from the windings; at least one rotor which faces an axial end surface of the cores with a gap therebetween; and a rotary shaft which rotates along with the rotor. The axial end surface side and the outer diameter side of the stator, is provided with multiple wiring support sections, each having an arc-shaped base part extending in a rotational direction along the annular shape of the outer diameter side of the stator, wherein the base part has a length extending over the outer diameter-side end surfaces of two or more adjoining core units and a predetermined axial width, and is equipped with multiple axial grooves for guiding the crossover wires in the rotational direction which are disposed on the opposite surface of the base from the rotary shaft. The rotary electric machine has a molding resin for integrally molding the wiring support sections with the stator.

First claim

The invention claimed is:

1. An axial gap type rotary electric machine comprising a stator configured by annularly disposing a plurality of core units about an axis of rotation, each core unit at least including a core, a winding disposed around an outer periphery of the core, and a crossover wire drawn out from the winding, at least a rotor configured to face an axial end face of the core via a gap, and a rotating shaft configured to rotate with the rotor, the axial gap type rotary electric machine comprising:
a plurality of wiring support portions provided on an axial end face side and an outer diameter side of the stator, each wiring support portion including a base having an arc shape and extending in a rotating direction along an annular shape on the outer diameter side of the stator;
in the base having a length extending over the end face on the outer diameter side of adjacent two or more of the core units and a predetermined width in an axial direction, a plurality of grooves provided in the axial direction and configured to guide the crossover wire in a rotating direction on a surface of the base opposite to the rotating shaft in a radial direction; and
a molding resin for integrally molding the wiring support portions and the stator.

2. The axial gap type rotary electric machine according to claim 1 , wherein
the grooves extend in the rotating direction.

3. The axial gap type rotary electric machine according to claim 1 , wherein
the wiring support portions each include sets of the grooves disposed in the axial direction, the sets of the grooves disposed at predetermined intervals in the rotating direction.

4. The axial gap type rotary electric machine according to claim 1 , wherein
each of the grooves has a width in the axial direction on an opening side smaller than a width of a region where the crossover wire is arranged.

5. The axial gap type rotary electric machine according to claim 1 , wherein
each of the grooves has a through hole penetrating through the base from a bottom of the base.

6. The axial gap type rotary electric machine according to claim 1 , wherein
the base includes a plurality of protrusions extending in the axial direction, provided on the surface on the rotating shaft center side in the rotating direction, with a molding resin disposed between adjacent protrusions.

7. The axial gap type rotary electric machine according to claim 1 , further comprising:
a housing configured to store the stator and the rotor and including an outlet to externally draw out the crossover wire, wherein
the stator, the crossover wire, the wiring support portions, and an inner periphery of the housing are integrally molded with the molding resin.

8. The axial gap type rotary electric machine according to claim 7 , wherein
the base includes an extended portion extending to the stator side from the plurality of grooves,
the outlet has a width in the axial direction that horizontally covers the width of the grooves in the axial direction, and
the extended portion has a length in the axial direction coinciding with a distance from one of the grooves nearest to the stator to the end face of the stator in the axial direction.

9. The axial gap type rotary electric machine according to claim 8 , wherein
the extended portion includes at least one through hole penetrating through in the shaft center direction.

10. The axial gap type rotary electric machine according to claim 1 , wherein
the wiring support portions are disposed on a non-load side of the stator.

11. The axial gap type rotary electric machine according to claim 1 , wherein
at least part of a projection surface of the wiring support portions overlaps the rotor in the radial direction.

12. The axial gap type rotary electric machine according to claim 1 , wherein
the base includes a plurality of projections each extending for a predetermined width on the outer diameter side from the surface opposite to the rotating shaft in the radial direction and disposed in the axial direction via a gap, and
the grooves are each formed by the gap.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Tokoi Hirooki
• Takahashi Shuuichi
• YONEOKA Yasuei
• Suzuki Toshifumi
• Uzawa Kenji
• Yamazaki Katsuyuki
• Sakai Toru
• Masaki Ryousou

Classifications

• H02K2203/12

  Machines characterised by the bobbins for supporting the windings · CPC title

• H02K2203/06

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

• H02K21/24

  with magnets axially facing the armatures, e.g. hub-type cycle dynamos · CPC title

• H02K3/521 Primary

  applicable to stators only · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title