Electric motor with combined magnetic pole of Nd-Fe-B permanent magnet and soft magnet

Electric motor with combined magnetic pole of Nd-Fe-B permanent magnet and soft magnet

  • CN 1,044,178 C
  • Filed: 02/27/1991
  • Issued: 07/14/1999
  • Est. Priority Date: 02/27/1991
  • Status: Active Grant
First Claim
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1. , the autosynchronous motor of a kind of Nd-Fe-B permanent magnetic and soft magnetism combined magnetic pole, for many to utmost point closing radial magnetic circuit, every pair extremely in one be a watt shape Nd-Fe-B permanent magnetic magnetic pole, another piece is a watt shape soft magnetism magnetic pole, identical and the soft magnetism magnetic pole space of permanent magnetism magnetic pole polarity, it is characterized in that number of pole-pairs P 〉

  • =2, inside and outside two curved surfaces of watt shape Nd-Fe-B permanent magnetic magnetic pole, the radius of curvature that is convex surface and concave curved surface equates, the pole embrace of watt shape Nd-Fe-B permanent magnetic magnetic pole and the pole embrace of watt shape soft magnetism magnetic pole do not wait, soft magnetism magnetic pole and rotor yoke fuse, configuration mouse cage conductor bar on the soft magnetism magnetic pole, and motor stator is three phase windings.

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