关键词: 轴向磁通永磁电机, 磁极错位, 齿槽转矩, 转矩脉动

Abstract: Aiming at the problem of torque ripple of low speed direct drive dual stator axial flux permanent magnet motor, the method of pole dislocation was adopted to reduce the cogging torque and torque pulsation of the motor. When keeping the mechanical structure of the motor unchanged, the upper and lower magnetic poles of the rotor were rotated at a certain angle, so that there was a certain phase difference in the cogging torque generated by the two axially combinated
single stator single rotor motors, and then the purpose of weakening the cogging torque and torque ripple was achieved. The generation mechanism of cogging torque was analyzed, the cogging torque and torque ripple were optimized using the analytical expression of cogging torque after magnetic pole dislocation, and the change of eddy current loss of permanent magnet caused by pole dislocation was further analyzed. The correctness of the method was verified by finite element simulation.

Key words: axial flux permanent magnet motor, magnetic pole dislocation, cogging torque, torque ripple