六相无刷直流电动机谐波转矩的分析与计算

无刷直流电动机具有诸多优点,但运行中仍然存在转矩脉动问题.分析了六相无刷直流电动机的工作原理,推导了六相无刷直流电动机的状态方程,采用状态变量法对电机转矩产生的关键量--反电势波形和电流波形进行了仿真和试验研究,对六相无刷直流电动机的谐波转矩进行了分析和推导,得出了通过减小电流滞后角可控制甚至消除正弦谐波脉动转矩的结论.

Analysis and calculation for harmonic torque of six-phase BLDC motor

The working principle of the six-phase BLDC motor was analyzed,and its state equation was deduced.The simulation and experiment research on the key factors-counter EMF and current waveform,which were produced by the torque,were performed with state variable,and the harmonic torque of six-phase BLDC motor was analyzed and deduced.At last the conclusion was obtained that the sine harmonic torque can be decreased or removed by reducing the current lagging angle.