发明授权
US06707213B2 Hybrid magnet type DC motor 失效
混合磁铁式直流电机

  • 专利标题: Hybrid magnet type DC motor
  • 专利标题(中): 混合磁铁式直流电机
  • 申请号: US10407324
    申请日: 2003-04-04
  • 公开(公告)号: US06707213B2
    公开(公告)日: 2004-03-16
  • 发明人: Kazuhiro Fujita
  • 申请人: Kazuhiro Fujita
  • 优先权: JP2002-102899 20020404
  • 主分类号: H02K2302
  • IPC分类号: H02K2302
Hybrid magnet type DC motor
摘要:
A DC motor has a stator that is constituted as a hybrid magnet. The stator has a plurality of electromagnets and permanent magnets that are alternately arranged in the circumferential direction of the stator. Fixed cores of the electromagnets have pole cores that have an approximately arched cross-sectional shape. When direct current is supplied to fixed coils, the pole cores are alternately magnetized to be N- and S-poles in the circumferential direction of the stator. The permanent magnets are anisotropic magnets. The inner surface of the permanent magnet includes a first portion that is arranged in one of both sides in the circumferential direction and magnetized to be an S-pole and a second portion that is arranged in the other of both sides in the circumferential direction and magnetized to be an N-pole. The first portion contacts the pole core that is magnetized to be an S-pole and the second portion contacts the pole core that is magnetized to be an N-pole. Accordingly, the DC motor, which achieves little leakage of magnetic flux and simple constitution, is obtained.
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