Armature of rotating electrical machine and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9893594-B2
Application number	US-201214417743-A
Country	US
Kind code	B2
Filing date	Sep 12, 2012
Priority date	Sep 12, 2012
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

Provided is an armature for a rotating electrical machine, which is capable of improving heat dissipation performance of an edgewise coil to enhance efficiency of the rotating electrical machine. The armature for a rotating electrical machine includes: a core including a yoke section and a tooth section that protrudes from the yoke section; an edgewise coil to be inserted onto the tooth section through intermediation of an insulating member, the edgewise coil being formed by winding a rectangular wire having a rectangular conductor cross-section through edgewise bending; and a heat transfer member filled into a gap between the tooth section and the edgewise coil. The armature has different gaps formed at two regions between the tooth section and a long side of the edgewise coil.

First claim

The invention claimed is:

1. An armature for a rotating electrical machine, comprising:
a core comprising a yoke section and a tooth section that protrudes from the yoke section;
an edgewise coil to be inserted onto the tooth section through intermediation of an insulating member, the edgewise coil being formed by winding a rectangular wire having a rectangular conductor cross-section through edgewise bending; and
a heat transfer member filled into a gap between the tooth section and the edgewise coil,
wherein the tooth section of the core comprises a left tooth section side surface and a right tooth section side surface that are opposed to the edgewise coil, and the edgewise coil comprises a left slot inner circumferential surface and a right slot inner circumferential surface that are opposed to the left tooth section side surface and the right tooth section side surface of the tooth section, respectively, and
wherein a size of a left gap between the left tooth section side surface and the left slot inner circumferential surface is different from a size of a right gap between the right tooth section side surface and the right slot inner circumferential surface.

2. An armature for a rotating electrical machine according to claim 1 , wherein the left gap and the right gap are formed between the yoke section and a long side of the edgewise coil.

3. An armature for a rotating electrical machine according to claim 2 , wherein the heat transfer member comprises varnish.

4. An armature for a rotating electrical machine according to claim 2 , wherein the heat transfer member comprises heat conductive silicon.

5. An armature for a rotating electrical machine according to claim 1 , wherein the heat transfer member comprises varnish.

6. An armature for a rotating electrical machine according to claim 1 , wherein the heat transfer member comprises heat conductive silicon.

7. A method of manufacturing an armature for a rotating electrical machine, comprising the steps of:
forming an edgewise coil by winding a rectangular wire having a rectangular conductor cross-section through edgewise bending;
inserting, through intermediation of an insulating member, the edgewise coil onto a tooth section of a core comprising a yoke section and the tooth section that protrudes from the yoke section, the tooth section of the core comprising a left tooth section side surface and a right tooth section side surface that are opposed to the edgewise coil, the edgewise coil comprising a left slot inner circumferential surface and a right slot inner circumferential surface that are opposed to the left tooth section side surface and the right tooth section side surface of the tooth section, respectively;
shifting the edgewise coil in a short side direction of the edgewise coil to have a left gap between the left tooth section side surface and the left slot inner circumferential surface different from a right gap between the right tooth section side surface and the right slot inner circumferential surface; and
filling a heat transfer member into a gap between the tooth section and the edgewise coil.

Assignees

• Yoshida Shinichiro
• Tamura Shuichi
• Inoue Masaya
• Yamamura Akihiro
• Ojima Koichi
• Okamoto Shogo
• Shirai Yutaro
• Mitsubishi Electric Corp

Inventors

• Yoshida Shinichiro
• Tamura Shuichi
• Inoue Masaya
• Yamamura Akihiro
• Ojima Koichi
• Okamoto Shogo
• Shirai Yutaro

Classifications

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title

• H02K15/06

  Embedding prefabricated windings in the machines · CPC title

• H02K3/325

  for windings on salient poles, such as claw-shaped poles · CPC title

• H02K3/345

  between conductor and core, e.g. slot insulation · CPC title

• H02K15/0081

  Electricity · mapped topic