Armature of rotating electrical machine and method for manufacturing same
View Patent ↗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.
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.