Title:
PERMANENT MAGNET-EMBEDDED ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2014/045445
Kind Code:
A1
Abstract:
A permanent magnet-embedded electric motor (1) wherein it is possible to increase the output of the motor without the torque declining by strengthening demagnetization resistance. The permanent magnet-embedded electric motor (1) is provided with a stator (3), and a rotor (5) having a rotor core (19), wherein the rotor core contains multiple magnet housing holes (21) and multiple permanent magnets (23), the thickness of the magnet housing holes in the short direction is smallest at the center part of the magnetic pole and becomes gradually larger towards the outside of the rotor core in the radial direction, and at least the thickness of the permanent magnets at the center part of the magnetic pole in the short direction is the same as the thickness of the magnetic housing holes at the center part of the magnetic pole in the short direction.
Inventors:
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
Application Number:
PCT/JP2012/074421
Publication Date:
March 27, 2014
Filing Date:
September 24, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
BABA KAZUHIKO (JP)
NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
International Classes:
H02K1/27
Foreign References:
| JP2000184640A | 2000-06-30 | |||
| JP2011091911A | 2011-05-06 | |||
| JP2010011640A | 2010-01-14 | |||
| JP2012139068A | 2012-07-19 | |||
| JPH08251846A | 1996-09-27 | |||
| JPH11155247A | 1999-06-08 | |||
| JPS58105779U | 1983-07-19 |
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
Michiharu Soga (JP)
Michiharu Soga (JP)
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