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Patent Searching and Data


Title:
PERMANENT MAGNET TYPE MOTOR AND METHOD OF PRODUCING PERMANENT MAGNET TYPE MOTOR
Document Type and Number:
WIPO Patent Application WO/2001/043259
Kind Code:
A1
Abstract:
A permanent magnet type motor with a permanent magnet, capable of reducing vibration and noise without lowering the motor efficiency, which comprises a stator (1) having multi-phase stator windings, and a rotor (10) disposed inside the stator in opposed relation through air gaps, and having a stator core (12) and permanent magnets (14) installed in the stator core, wherein the permanent magnets (14) are so shaped that their section at right angles with the axis of rotation is convexed on both inner and outer diameter sides and that the focus of magnetism orientation in each magnet pole of the permanent magnet (14) is disposed outside the rotor (10).

Inventors:
TAJIMA TSUNEYOSHI (JP)
OIKAWA TOMOAKI (JP)
KAZAMA OSAMU (JP)
MASUMOTO KOJI (JP)
KATOU MASAKI (JP)
BABA KAZUHIKO (JP)
Application Number:
PCT/JP2000/007926
Publication Date:
June 14, 2001
Filing Date:
November 10, 2000
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
TAJIMA TSUNEYOSHI (JP)
OIKAWA TOMOAKI (JP)
KAZAMA OSAMU (JP)
MASUMOTO KOJI (JP)
KATO MASAKI (JP)
BABA KAZUHIKO (JP)
International Classes:
H02K1/27; H02K29/03; (IPC1-7): H02K1/27; H02K1/22
Foreign References:
JP2000245084A2000-09-08
JPH11285184A1999-10-15
JPH0739090A1995-02-07
JPH11146582A1999-05-28
EP0223612A11987-05-27
JPH05219669A1993-08-27
Attorney, Agent or Firm:
Mizoi, Shoji (NTA Ofuna Building, 3rd Floor 17-10 Ofuna 2-chome Kamakura-shi, Kanagawa, 247-0056, JP)
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