发明授权

  • 专利标题: Electrical machine with permanent magnet excitation
  • 专利标题(中): 电机永磁激励
  • 申请号: US387331
    申请日: 1989-07-28
  • 公开(公告)号: US4973868A
    公开(公告)日: 1990-11-27
  • 发明人: Bernhard Wust
  • 申请人: Bernhard Wust
  • 申请人地址: DEX Heidenheim
  • 专利权人: J. M. Voith GmbH
  • 当前专利权人: J. M. Voith GmbH
  • 当前专利权人地址: DEX Heidenheim
  • 优先权: DEX3826339 19880803
  • 主分类号: H02K1/27
  • IPC分类号: H02K1/27 H02K21/12
Electrical machine with permanent magnet excitation
摘要:
Contained in an electrical machine with a field excited by permanent magnets, on the rotor, are pole bodies that extend in ring fashion and coaxially with the rotor shaft, forming between stator pole shoes an air gap. The rotor consists of a specific sequence of permanent magnets and soft iron components which alternately are arranged side by side and jointly embedded in plastic. This gives the rotor a labile structure with a low modulus of elasticity. Apart from the present invention, the air gap could change during operation through vibrations, specifically flexural vibrations. This could lead to losses in efficiency and, most of all, considerable noise generation. A massive damping ring is provided on the free ends of the pole bodies, possibly bearing on the stator housing, which provides for a smooth running of the machine.
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