Optimum Shape Design of Magnetizing Yoke of 2 Pole PM Motor for Cogging Torque Reduction

  • Koh Chang-Seop (School of Electrical & Computer Engineering, Chungbuk National University) ;
  • Ryu Jae-Seop (Electrotechnology R & D Center, LS Industrial Systems) ;
  • Hong Sun-Ki (School of Electrical engineering, Hos대 University)
  • Published : 2005.06.01


A novel cogging torque reduction algorithm is presented for 2-pole permanent magnet DC motor. While the shape of the permanent magnet is changed in the conventional method, the pole shape of the magnetizing yoke is optimized in the presented algorithm. In order to parameterize the shape of the yoke, and the distribution of the residual magnetization of the permanent magnet, the Bezier spline is used. The shape of the magnetizing yoke is optimized using the design sensitivity analysis incorporated with the finite element method and Bezier spline.


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