Four PWM modes used in the brushless DC motor control system are introduced and their different influences on the commutation torque ripple of BLDC motors are analyzed in detail.

• 介绍了无刷直流电机控制系统中的四种PWM调制方式,详细分析了四种不同的调制方式对无刷直流电机换相转矩脉动的影响。