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Title:
PERMANENT MAGNET TYPE MOTOR
Document Type and Number:
WIPO Patent Application WO/2004/093298
Kind Code:
A1
Abstract:
A permanent magnet type motor (10) comprising a rotor (30) having permanent magnets arranged in two stages in the axial direction on the outer circumference of a rotor core while being shifted by an electrical stage skew angle Ѳr in the circumferential direction of the stator core between two stages in order to reduce the first frequency component of cogging torque, a tubular stator core (21) provided with a stator winding generating a rotational magnetic field for rotating the rotor (30), and a stator (20) where the stator core (21) is divided into a plurality of sections in the axial direction and arranged while being shifted by an electrical stage skew angle Ѳs in the circumferential of the stator core (21) in order to reduce the second frequency component of cogging torque.

Inventors:
MIYAZAKI TAKASHI (JP)
KIKUCHI TOMOHIRO (JP)
KOMETANI HARUYUKI (JP)
YAMAGUCHI SHINICHI (JP)
Application Number:
PCT/JP2003/004643
Publication Date:
October 28, 2004
Filing Date:
April 11, 2003
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
MIYAZAKI TAKASHI (JP)
KIKUCHI TOMOHIRO (JP)
KOMETANI HARUYUKI (JP)
YAMAGUCHI SHINICHI (JP)
International Classes:
H02K1/12; H02K1/27; H02K1/28; H02K21/16; H02K29/03; (IPC1-7): H02K21/16; H02K1/27; H02K1/28; H02K1/12
Domestic Patent References:
WO1998040952A11998-09-17
Foreign References:
EP1052761A22000-11-15
JP2003032939A2003-01-31
JP2000308286A2000-11-02
JP2003061326A2003-02-28
Attorney, Agent or Firm:
Miyata, Kaneo c/o Mitsubishi Denki Kabushiki Kaisha (2-3 Marunouchi 2-Chom, Chiyoda-ku Tokyo, JP)
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