# US 2009/0261684 A1 · Stator of electric rotating machine

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- Number: US 2009/0261684 A1
- Document ID: US20090261684A1
- Status: Published application
- Kind: A1
- Application number: 12/423,876
- Filed: 2009-04-15
- Published: 2009-10-22
- Earliest claimed: 2008-04-18
- Assignees: Nippon Soken, Inc.; Denso Corporation
- Inventors: Sadahisa Onimaru; Hirohito Matsui; Hirofumi Kinjo; Katsuhiko Oka; Shinji Kouda
- Web page: https://patentgrep.com/patent/US20090261684A1

## CPC

- H02K 1/16: Stator cores with slots for windings
- H02K 15/021: Magnetic cores
- Y10T 29/49009: Dynamoelectric machine
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The stator of an electric rotating machine includes a stator core having slots formed at an inner periphery thereof, and a stator winding constituted by conductive wires wound on the slots. The stator winding including in-slot portions accommodated in the slots and turn portions each connecting each adjacent two of the in-slot portions at outside of the slots. The stator core including a core member having at least three tooth portions extending in a radial direction of the stator core and a core back portion integrally connecting the tooth portions at a radially end side thereof. The core member is configured such that each of the first tooth portions folded toward the core back portion is capable of unfolding to extend between a corresponding adjacent two of the in-slot portions when the core member is at a predetermined axial position with respect to the stator winding.

## Claims

### Claim 1

A stator of an electric rotating machine comprising:
a stator core having slots formed at an inner periphery thereof along a circumferential direction thereof; and
a stator winding constituted by conductive wires wound on said slots
said stator winding including in-slot portions accommodated in said slots and turn portions each connecting each adjacent two of said in-slot portions outside of said slots,
said stator core including a core member having at least three first tooth portions extending in a radial direction of said stator core and a core back portion integrally connecting said first tooth portions at a radially end side thereof,
said core member being configured such that each of said first tooth portions folded toward said core back portion is capable of unfolding to extend between a corresponding adjacent two of said in-slot portions when said core member is at a predetermined axial position with respect to said stator winding.

### Claim 2 (depends on 1)

The stator according to claim 1, wherein said core back portion has a ring-like shape.

### Claim 3 (depends on 1)

The stator according to claim 1, wherein said core member is made of an amorphous metal plate.

### Claim 4 (depends on 3)

The stator according to claim 3, wherein said stator winding has a shape of a cylinder having open ends, and said core member is slid along said stator winding from a side of one of said open ends to said predetermined axial position to be assembled to said stator winding.

### Claim 5 (depends on 1)

The stator according to claim 1, wherein said stator core further includes divided core members, each of which is made of metal plate, and has at least two second tooth portions extending in said radial direction, and a core back portion integrally connecting said second tooth portions at a radially end side thereof.

### Claim 6 (depends on 1)

The stator according to claim 1, wherein said conductive wire has a rectangular cross-sectional shape.

### Claim 7 (depends on 1)

The stator according to claim 1, wherein said conductive wire is wound over an entire circumferential length of said stator core.

### Claim 8 (depends on 1)

The stator according to claim 1, wherein said conductive wire includes a conductor and an insulating film covering an outer surface of said conductor, said insulating film having a thickness from 100-200 μm.

### Claim 9 (depends on 8)

The stator according to claim 8, wherein said insulating film is constituted by an inner layer and an outer layer, a glass transition temperature of said outer layer being lower than that of said inner layer.

### Claim 10 (depends on 8)

The stator according to claim 8, wherein said insulating film is coated with a fusion member.

### Claim 11 (depends on 8)

The stator according to claim 8, wherein said conductor of said conductive wire is made of aluminum.

### Claim 12 (depends on 1)

An electric rotating machine comprising a stator as recited in claim 1, and a rotor having magnet poles formed such that N poles and S poles alternate along a circumferential direction of said rotor so as to face an inner or outer periphery of said stator.