关键词: 永磁同步电机, 电流畸变, 直流分量, 不平衡电流, 转矩波动

Abstract: The 8-pole and 12-slot permanent magnet synchronous motor was taken as the research object. The torque ripple under two kinds of abnormal currents,i. e. ,DC component and out-of-balance current, was studied. The influence of abnormal currents on the torque ripple was analyzed theoretically. The torque ripple under DC component and out-of-balance current conditions was simulated numerically,and the simulation results were in agreement with the theoretical results. The torque test further verifies the theoretical analysis and numerical simulation,which provides a theoretical basis for solving similar engineering problems in actual production.

Key words: permanent magnet synchronous motor, abnormal current, DC component, out-of-balance current, torque ripple