关键词: 永磁同步电机, 齿槽转矩, 定子椭圆, 有限元分析

Abstract:

Starting from the cogging torque analytical formula, the distribution of various harmonics and the cogging torque cycle was deduced. The influence of the stator ellipse, notched distribution of the permanent magnet synchronous motor and static eccentricity of the rotor on the cogging torque was analyzed. The simulation results show that the stator ellipse is the main factor affecting the cogging torque of the motor, and the cogging torque of the motor increases approximately linearly with the stator ellipticity. The experiments on the cogging torque of the prototype motor was tested, and the difference between the simulated value and the measured value was only 2.09%, which verified the feasibility and correctness of the cogging torque analysis using the stator ellipse model.

Key words: permanent magnet synchronous motor (PMSM), cogging torque, elliptical stator, finite element analysis