| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce a cogging torque, a vibration and a noise in a permanent magnet motor. SOLUTION: The permanent magnet motor (1) comprises: a stator (2) having a stator iron core (10) provided with a plurality of magnetic pole teeth (12) and slots (16) for a stator winding; and a rotor (3) having a plurality of fixed permanent magnets (5) and rotatably supported within the stator. A plurality of the permanent magnets are divided in the direction of the center of a rotating shaft. Each permanent magnet is circumferentially shifted so as to cancel the cogging torque. A stator iron core piece (20a) is disposed in a region of the stator iron core facing a boundary (9) of the divided permanent magnet and having the closed slots. COPYRIGHT: (C)2007,JPO&INPIT
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