Title:
【発明の名称】永久磁石同期電動機
Document Type and Number:
Japanese Patent JP3076006
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a permanent magnet synchronous motor to improve demagnetization proof strength of a rotor magnet by adopting a centralized winding system. SOLUTION: In a permanent magnet synchronous motor having a a centralized winding type stator, a space between teeth 4 and 4 of a stator 1 is defined as La, an air gap 8 between the stator 1 and a rotor 2 is defined as Lg. By setting the space La to La 2.0 Lg and setting the space between the end of the teeth 4 to less than 2.0 times Lg of the air gap 8, a magnetic flux of demagnetization is restrained from flowing toward the the rotor 2, making it difficult for the magnetic field of demagnetization to act on a permanent magnet 6 in order to improve demagnetization proof strength of the permanent magnet 6 even in the case the magnetic pole of a coil and the rotor 2 are made to oppose.
Inventors:
Hiroshi Murakami
Yukio Honda
Shizuka Yokote
Yoshinari Asano
Yukitoshi Wada
Hideo Hirose
Yasuaki Matsushita
Yukio Honda
Shizuka Yokote
Yoshinari Asano
Yukitoshi Wada
Hideo Hirose
Yasuaki Matsushita
Application Number:
JP24293997A
Publication Date:
August 14, 2000
Filing Date:
September 08, 1997
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H02K1/06; H02K1/16; H02K1/18; H02K1/27; H02K21/16; (IPC1-7): H02K21/16; H02K1/06; H02K1/16; H02K1/18; H02K1/27
Domestic Patent References:
| JP279738A | ||||
| JP62114454A | ||||
| JP8331823A | ||||
| JP5304737A | ||||
| JP7255138A | ||||
| JP447374U |
Attorney, Agent or Firm:
Masaru Ishihara