Commutation torque ripple is an important factor affecting the performance of brushless DC (BLDC) motor drives. In order to suppress this torque ripple, an alternating conduction control strategy between the two-phase and three-phase conduction mode has been proposed in this study. During the non-commutation periods, the conventional two-phase conduction mode is selected to drive the BLDC motor. While during the commutation period, the commutation torque ripple is reduced by employing an alternating two-phase and three-phase conduction mode. By calculating the duty cycle of the three-phase conduction mode, which indicates whether the rate of change in current in the incoming and outgoing phase is equal during the commutation interval, the commutation torque ripple is effectively reduced, while the current in the non-commutated phase is maintained constant. Simulation and experimental results show that the proposed method can suppress the commutation torque ripple efficiently, particularly at high rotational speeds of the motor.

中文翻译：

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采用两相和三相交流交替模式的无刷直流电动机驱动器的转矩脉动抑制

换向转矩脉动是影响无刷直流（BLDC）电机驱动器性能的重要因素。为了抑制该转矩脉动，本研究提出了一种在两相和三相传导模式之间的交替传导控制策略。在非换相期间，选择传统的两相传导模式来驱动BLDC电机。在换向期间，通过采用交替的两相和三相导通模式来减小换向转矩脉动。通过计算三相导通模式的占空比，该占空比指示在换向间隔期间输入和输出相中电流的变化率是否相等，可以有效地减小换向转矩脉动，而非换相阶段的电流保持恒定。仿真和实验结果表明，该方法可以有效地抑制换向转矩脉动，特别是在电动机高转速下。