基于Sepic逆变器抑制无刷直流电机换相转矩脉动研究

Research on Commutation Torque Pulsing of brushless DC Motor Controlled Based Sepic-inverter

无刷直流电机(BLDCM)既具备直流电动机的运行效率高、无励磁损耗以及调速性能好等优点,又具备交流电动机的结构简单、运行可靠、维护方便等一系列优点。因此,在各行各业得到了广泛的应用。但缺点是转矩脉动较大。本文提出了一种sepic逆变器来抑制无刷直流电机换相转矩脉动,在换相过程中,通过提高母线电压使关断相和开通相的电流变化速率相等来起到抑制转矩脉动的作用。

The operation of the BLDCM with both dc motor with high efficiency,no excitation loss and speed control performance is good wait for an advantage,and has the ac motor has simple structure,reliable operation,easy maintenance and a series of advantages. So,it has been widely used in all walks of life. However,the disadvantage is that the torque ripple is bigger. This paper proposes a sepic-inverter to suppress the commutation torque ripple of BLDC motor,in the process of commutation,by improving the voltage causes closing and opening phase current changing rate is equal to play the role of inhibition of the torque ripple.