：介绍了永磁无刷直流电机(BLDCM)常用PWM调制方式，分析了调制方式对电枢电流的影响，总结了关于无刷直流电机PWM调制方式目前的研究成果，对各种调制方式的优缺点进行了讨论，并通过仿真实验进行了验证．-: Introduction of the permanent magnet brushless DC motor (BLDCM) commonly used PWM modulation mode analysis of modulation effects of the armature current, summed up on the brushless DC motor PWM modulation current research results, the advantages of various modulation shortcomings are discussed and verified by simulation experiments.