Effect of magnetic magnetizing method on theperformance of high speed permanent magnet motor
                                                      ZHANG Bingyi, JIANG Xin, FENG Guihong
                      （School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China）

Abstract: Aiming at the magnetizing methods of high speed permanent magnet motor, three kinds of permanent magnet magnetization was investigated in a high speed permanent magnet motor (250 kW, 67 000 r/min), which include radial magnetization parallel magnetization and Halbach. And the influence of air gap magnetic field, cogging torque and loss brought by different magnetizing methods was analyzed. According to the actual magnetization method, the high speed permanent magnet motor model was established in the finite element software to study the performance of high speed permanent magnet motor under different magnetization methods. The finite element method was employed to study the effects of air gap magnetic field, cogging torque, noload stator iron loss, rotor eddy current loss, and rated total loss etc., and conclude the ideal magnetizing method of high speed permanent magnet motor. The result indicate that more sinusoidal air gap flux density, less cogging, smaller total loss and better running performance can be gotten when parallel magnetizing method is adopted.

Key words: highspeed ;permanent magnet motor; magnetizing method