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五相永磁电机传统直接转矩控制(direct torque control,DTC)方法存在转矩与磁链脉动过大以及相电流谐波畸变率较高的问题,而利用空间电压矢量调制技术的改进型DTC的推导及实现又较为复杂.为解决上述问题,该文提出一种简易的五相永磁电机直接转矩控制策略.该策略引入了与空间电压矢量调制技术等效的基于零序电压谐波注入式脉宽调制技术,可在保持电机良好动态响应性能的同时,有效减小电机的转矩和磁链脉动,并大幅降低相电流的3次谐波含量.此外,该方法可使控制过程中的计算得到很大程度简化,易于在数字控制器中实现.仿真和实验结果证明了理论分析的正确性及所提控制策略的可行性.“,”Traditional direct torque control (DTC) causes high harmonic distortion of phase currents and significant ripples both on torque and flux linkage in five-phase permanent magnet motor drive,while the deduction and realization of DTC using the space vector modulation technique is more complex to some extent.To solve these problems,a simple DTC strategy of five-phase permanent magnet motors is proposed in this paper.The cartier-based pulse width modulation based on zero-sequence voltage harmonic injection is introduced in the proposed strategy,which is equivalent to the space vector modulation technique.The proposed strategy can effectively reduce the torque and flux ripples,as well as the third harmonic content of phase currents under the premise of excellent dynamic performance of the DTC system.Besides,the proposed strategy is more simple and easy to implement in a digital controller.The simulation and experimental results verify the theoretical analysis of the proposed control strategy.