中文摘要：

在以往永磁同步电机直接转矩控制研究中,将零电压矢量引入到直接转矩控制转矩调节器中,起到了降低转矩脉动的作用。但是,这些研究没有定量的解决优化计算转矩调节器中零电压矢量作用范围的问题。该文分析了永磁同步电机直接转矩控制中电机转矩变化规律,推导出了转矩调节器中使转矩脉动最小的零电压矢量作用范围优化计算公式,从而解决了转矩调节器优化设计问题。仿真和实验结果均验证了理论分析的正确性和优化计算公式的有效性

英文摘要：

In previous study of permanent magnet synchronous motor direct torque control（PMSM DTC）,zero voltage vector was introduced into the torque regulator in PMSM DTC to reduce the torque ripple.But the problem of quantitative optimization design of zero voltage vector working zone in torque regulator is not solved.The torque variation regularity in PMSM DTC is analyzed detailedly in this paper.And the optimization zero voltage vector working zone formula which is used to design the torque regulator to reduce the torque ripple is deduced.With the optimization design formula,the problem of torque regulator design is solved.The validity of the theory analysis and the feasibility of the torque regulator design method are verified by the simulation and experiment results.