永磁同步电机模糊直接转矩控制仿真

针对永磁同步电机直接转矩控制中存在较大转矩脉动的缺点，提出用模糊控制器取代滞环比较器的控制策略．基于Simulink FIS工具箱对模糊直接转矩控制系统进行了仿真．结果表明：通过对转矩误差、定子磁链误差的模糊分级，结合转子位置得到适舍的电压控制矢量，能减小转矩脉动和磁链脉动；模糊直接转矩控制转速和转矩响应优于传统直接转矩控制．

Simulation of Direct Torque Control for PMSM Based on Fuzzy Algorithm

To solve the problem of big torque ripples in the direct torque control(DTC) of PMSM,a novel DTC method is proposed,in which the hysteresis controller is replaced by a fuzzy controller.Then,a fuzzy logic-based DTC system for PMSM is simulated using the FIS tool box of Matlab/Simulink.The results indicate that,in the proposed fuzzy logic-based DTC system,the errors on the torque and the stator flux linkage can be fuzzy classified and a suitable voltage vector can be obtained according to the torque location,thus reducing the torque and the flux linkage ripples.Moreover,the fuzzy logic-based DTC can effectively reduce the torque ripples caused by the hysteresis loop.It is concluded that the proposed method is superior to the traditional controller in both speed and torque response.