# US 7,466,059 B2 · Rotor of electric rotating machine

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- Number: US 7,466,059 B2
- Document ID: US7466059B2
- Status: Granted
- Kind: B2
- Application number: 11/305,144
- Filed: 2005-12-19
- Published: 2006-05-11
- Granted: 2008-12-16
- Earliest claimed: 2002-10-15
- Assignees: Mitsubishi Denki Kabushiki Kaisha
- Inventors: Naohide Maeda; Yoshihito Asao
- Web page: https://patentgrep.com/patent/US7466059B2

## CPC

- H02K 21/044: {Rotor of the claw pole type}
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

Deformation and vibration of claw magnetic poles in rotor are reduced. A rotor includes: a rotor coil 15 for generating a magnetic flux by applying a current; a pole core comprised of a first pole core body 19 and a second pole core body 20 that are disposed so as to cover the rotor coil 15, each being provided with claw-shaped claw magnetic poles 21, 22 engaging with each other; and a magnet assembly 25 composed of a magnet 23 for reducing leakage of magnetic flux and a magnet-holding member 24 for supporting the magnet 23 on the claw magnetic poles 21, 22. Center of gravity 25G of the magnet assembly 25 is located on the base part side nearer than the center of the claw magnetic poles 21, 22.

## Claims

### Claim 1

A rotor of an electric rotating machine comprising: a rotor coil for generating a magnetic flux by applying a current; and a pole core comprised of a first pole core body and a second pole core body that are disposed so as to cover the rotor coil, each being provided with claw-shaped claw magnetic poles engaging with each other;
wherein a plurality of magnetic assemblies, each magnet assembly composed of magnets for reducing leakage of magnetic flux and a magnet-holding member for supporting said magnets on said claw magnetic poles, are arranged on solely a base part side of each of said claw magnetic poles respectively,
wherein each magnet assembly is arranged on the side walls of the base part side of only one claw magnetic pole.

### Claim 2 (depends on 1)

The rotor of an electric rotating machine according to claim 1, wherein each of said magnet assemblies extends to the base parts of respective claw poles.

### Claim 3 (depends on 1)

The rotor of an electric rotating machine according to claim 1, wherein each said magnet-holding member extends to a backside of its respective pole and is fitted to its respective pole.

### Claim 4 (depends on 1)

The rotor of an electric rotating machine according to claim 1, wherein said magnets for reducing leakage of magnetic flux are arranged on a reverse side of said claw magnetic poles.

### Claim 5 (depends on 1)

The rotor of an electric rotating machine according to claim 1, wherein each said magnetic holding member is welded to its respective pole.