Title:
モータ
Document Type and Number:
Japanese Patent JP6484009
Kind Code:
B2
Abstract:
The invention provides a motor capable of suppressing a cogging effect and acquiring appropriate counter electromotive force even though the magnetic flux density of a main body portion, around which a coil is wound, in salient poles of a stator core is increased in an unexcited state. The motor is provided with the stator core on which multiple salient poles (21) around which coils are wound are formed circumferentially; and a cylindrical permanent magnet rotor on which multiple magnetic poles (620) are formed circumferentially. When n is an integer greater than 1, the number of the magnetic poles (620) is 2n and the number of the salient poles (21) is 3n. In the salient poles (21), the magnetic flux density of the main body portion (23) around which the coils are wound is more than 1.0T, or even more than 1.3T in the unexcited state, which in more than 90% of saturation flux density. The permanent magnets (62) form the magnetic poles (620) in a way having an oblique angle [theta] of an electric angle from 65 to 75 degrees.
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Inventors:
Daisuke Higuchi
Application Number:
JP2014235925A
Publication Date:
March 13, 2019
Filing Date:
November 20, 2014
Export Citation:
Assignee:
Nidec Sankyo Co., Ltd.
International Classes:
H02K1/27; H02K1/16
Domestic Patent References:
| JP2006086319A | ||||
| JP2005020930A | ||||
| JP2004194489A | ||||
| JP5168181A | ||||
| JP2006320088A |
Attorney, Agent or Firm:
Toru Kawai
Shin Kodaira
Kawaguchi Nobuko
Shiro Yokozawa
Shin Kodaira
Kawaguchi Nobuko
Shiro Yokozawa