Armature of rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9601959-B2
Application number	US-201214363958-A
Country	US
Kind code	B2
Filing date	Mar 22, 2012
Priority date	Mar 22, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A coil end of a coil is insulated from a stator core by a molded member made of an insulating resin, and the coil, which is positioned in a slot, is insulated by insulating paper. In an armature of a rotating electrical machine, the molded member is divided into a first member and a second member that are rotatably coupled to each other by a hinge.

First claim

The invention claimed is:

1. An armature of a rotating electrical machine comprising:
a stator core;
an edgewise coil that is formed by bending a rectangular copper wire in an edgewise direction; and
a molded member that is inserted into a coil end portion of the edgewise coil and is formed of an insulating member insulating the edgewise coil wound on a tooth of the stator core from the stator core and supporting the edgewise coil,
wherein the molded member is formed of a first member and a second member,
each of the first member and the second member includes a back portion, a coil mounting portion which extends from each back portion and on which the coil end of the edgewise coil is mounted, and a flange that is formed at a tooth tip of the coil mounting portion,
the first member and the second member are coupled to each other by rotatable coupling means which provides a changeable space between the flanges of the coil mounting portions, so that the space between the flanges of the coil mounting portions are changeable before and after insertion of the coil mounting portions into the edgewise coil,
the coil end of the edgewise coil is insulated by the molded member, and
the edgewise coil positioned in a slot of the stator core is insulated from an inner wall of the slot by insulating paper, so that the insulating paper is provided between the edgewise coil and at least a portion of at least one of the first and second members and directly contacts a surface of the tooth of the stator core.

2. The armature of a rotating electrical machine according to claim 1 ,
wherein the coupling means, which couples the first member to the second member, is formed of a hinge mechanism.

3. The armature of a rotating electrical machine according to claim 2 ,
wherein a stepped portion is formed on a surface, which comes into contact with the stator core, of each of the coil mounting portions of the first and second members, and a stepped portion, which is fitted to the stepped portion, is formed at the stator core.

4. The armature of a rotating electrical machine according to claim 3 ,
wherein protrusions are formed on the stepped portions of the coil mounting portions, and recesses, which are to be fitted to the protrusions, are formed at the stator core.

5. The armature of a rotating electrical machine according to claim 1 ,
wherein the coupling means, which couples the first member to the second member, is formed of a plate-like elastic body.

6. The armature of a rotating electrical machine according to claim 5 ,
wherein stepped portions are formed at lower portions of the flanges of the first and second members,
a leaf spring shape, which is formed by folding, is formed at a portion, which comes into contact with the stator core, of the plate-like elastic body, and
a hole to which the leaf spring shape is to be fitted is formed at the stator core.

7. The armature of a rotating electrical machine according to claim 1 ,
wherein the dimension of a radius of curvature of a curved surface of an edge portion of each of the flanges, which are formed at tips of the first and second members, is equal to or larger than the dimension of a radius of curvature of the inside of the coil end.

8. The armature of a rotating electrical machine according to claim 1 ,
wherein chamfers are formed on the back portions, which are provided on the back side of the stator core, of the first and second members.

9. The armature of a rotating electrical machine according to claim 1 , wherein two pairs of coupled first and second members are provided on each tooth of the stator core.

10. The armature of a rotating electrical machine according to claim 1 , wherein the first member and the second member that are detachably attached to each other by the rotatable coupling means.

Assignees

• Shirai Yutaro
• Yoshida Shinichiro
• Tsuiki Hironori
• Mitsubishi Electric Corp

Inventors

• Shirai Yutaro
• Yoshida Shinichiro
• Tsuiki Hironori

Classifications

• H02K3/345 Primary

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

• H02K2203/12

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

• H02K3/18

  Windings for salient poles · CPC title

• H02K1/148

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

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title