Stator of electric rotary machine and fabrication method therefor

Patent metadata

Field	Value
Publication number	US-9793773-B2
Application number	US-201414256457-A
Country	US
Kind code	B2
Filing date	Apr 18, 2014
Priority date	Apr 24, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

One embodiment provides a stator of an electric rotary machine, including: a stator core having plural slots; a segmented coil of plural phases; and plural base plates laminated at each end of the stator core in an axial direction. While the stator core and plural coil bars of the segmented coil form a stator core assembly, and the plural base plates and plural end coil connections of the segmented coil form plural base plate assemblies. The stator is configured by the stator core assembly and the plural base plate assemblies laminated at each end of the stator core assembly.

First claim

The invention claimed is:

1. A stator of an electric rotary machine, including:
a stator core having plural slots;
a segmented coil of plural phases; and
plural base plates laminated at each end of the stator core in an axial direction extending along a rotation axis of the rotary machine,
wherein the segmented coil includes
plural coil bars which are individually inserted in the plural slots in the stator core and which extend substantially straight and
plural end coil connections which are disposed on each of the base plates to form spanning portions to connect the coil bars of the same phase together,

wherein each of the plural base plates includes plural through holes configured to receive the plural coil bars, respectively,
wherein each of the plural base plates includes an inner surface located on an inner side thereof in the axial direction and an outer surface located on an outer side thereof in the axial direction, the plural end coil connections are disposed on the inner surface and on the outer surface,
wherein the stator core and the plural coil bars form a stator core assembly,
wherein each of the plural base plates is assembled with a corresponding part of the plural end coil connections to form a corresponding one of plural base plate assemblies,
wherein the stator is configured by the stator core assembly and the plural base plate assemblies laminated at each end of the stator core assembly, and
wherein the plural base plates include a first base plate and a second base plate both of which are disposed at one end of the stator core in the axial direction, the second base plate being disposed outward of the first base plate in the axial direction of the stator core.

2. The stator of claim 1 ,
wherein at least a first and second coil bars are inserted in each of the slots in the stator core so as to be aligned radially with each other, and
wherein the first and second coil bars are connected individually to the end coil connections of the different base plate assemblies.

3. The stator of claim 1 ,
wherein the coil bars which are inserted in each of the slots in the stator core include
a first coil bar which is inserted radially outwards and
a second coil bar which is inserted radially inwards,

wherein the first coil bar is connected to the end coil connection on a first base plate assembly which includes the first base plate and is disposed axially outwards of the stator core assembly, and
wherein the second coil bar is connected to the end coil connection on a second base plate assembly which includes the second base plate and is disposed axially outwards of the first base plate assembly.

4. The stator of claim 3 ,
wherein the second coil bar has an axial length which is longer than an axial length of the first coil bar.

5. The stator of claim 3 ,
wherein an outside diameter of the second base plate assembly is smaller than an outside diameter of the first base plate assembly.

6. The stator of claim 3 ,
wherein an insulating member is interposed between the first base plate assembly and the second base plate assembly, the insulating member locking the first base plate assembly and the second base plate assembly together and electrically insulating the end coil connections on the first base plate assembly and the end coil connections on the second base plate assembly from each other.

7. A fabrication method for a stator of an electric rotary machine including: a stator core having plural slots; a segmented coil of plural phases; and plural base plates laminated at each end of the stator core in an axial direction, wherein the segmented coil includes plural coil bars which are individually inserted in the plural slots in the stator core and which extend substantially straight and plural end coil connections which are disposed on each of the base plates to form spanning portions to connect the coil bars of the same phase together, the method including:
inserting the plural coil bars in the individual slots in the stator core to form a stator assembly;
disposing the plural end coil connections individually in the base plates to form plural base plate assemblies such that each of the plural base plates is assembled with a corresponding part of the plural end coil connections to form a corresponding one of the plural base plate assemblies; and
laminating the plural base plate assemblies to each end of the stator core assembly in an axial direction extending along a rotation axis of the rotary machine side of the stator core assembly while interposing an insulating member therebetween to assemble them such that the plural base plates include a first base plate and a second base plate both of which are disposed at one end of the stator core assembly in the axial direction, the second base plate being disposed outward of the first base plate in the axial direction of the stator core assembly such that each of the plural base plates includes plural through holes configured to receive the plural coil bars, respectively, and each of the plural base plates includes an inner surface located on an inner side thereof in the axial direction and an outer surface located on an outer side thereof in the axial direction, the plural end coil connections are disposed on the inner surface and on the outer surface.

8. The method of claim 7 ,
wherein the plural base plate assemblies are laminated together with another insulating member interposed therebetween between the first base plate and the second base plate.

9. The method of claim 7 ,
wherein an outside diameter of the second base plate is smaller than an outside diameter of the first base plate.

10. The stator of claim 1 ,
wherein an outside diameter of the second base plate is smaller than an outside diameter of the first base plate.

Assignees

• Honda Motor Co Ltd

Inventors

• Iki Tomotaka

Classifications

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K3/12 Primary

  arranged in slots · CPC title