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Title:
PERMANENT MAGNET SYNCHRONOUS MOTOR
Document Type and Number:
WIPO Patent Application WO/2013/018697
Kind Code:
A1
Abstract:
The present invention is capable of drastically reducing the cogging torque of a permanent magnet synchronous motor. In this permanent magnet synchronous motor, a rotor having permanent magnets is skewed in a number of stages required for dividing a fundamental wave, which is determined by the least common multiple of the numbers of poles and slots, into multiple fundamental waves. An intervening non-magnetic material for inter-stage magnetic flux leakage prevention is provided between each set of skew stages. Consequently, the fundamental waves of the cogging torque can be reliably cancelled out. Also, the cogging torque can be drastically reduced.

Inventors:
ENDO KENJI (JP)
Application Number:
PCT/JP2012/069142
Publication Date:
February 07, 2013
Filing Date:
July 27, 2012
Export Citation:
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Assignee:
SIM DRIVE CORP (JP)
ENDO KENJI (JP)
International Classes:
H02K1/27
Domestic Patent References:
WO2009069575A12009-06-04
Foreign References:
JP2000308287A2000-11-02
JP2002281722A2002-09-27
JP2004248422A2004-09-02
JP2000308286A2000-11-02
Attorney, Agent or Firm:
FUJISAWA Noriaki et al. (JP)
Fujisawa Noriaki (JP)
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Claims: