基于MATLAB/Simulink的永磁同步电机直接转矩控制仿真建模

介绍了永磁同步电机直接转矩控制系统各个环节的MATLAB／Simulink建模方法，并对系统进行仿真，研究了系统的性能以及PI控制器参数对系统性能的影响，同时比较了不同转矩滞环环宽的转矩脉动情形，结果表明，该系统具有良好的转速、转矩响应，随着转矩滞环环宽的变小，转矩的脉动幅度也随之减小，PI控制器参数中，随着比例系数Kp的增大，系统动态响应加快，积分系数Ki则主要影响系统的稳态误差，两者必须协调才能使系统达到较好的性能。

Simulation and Modeling of Direct Torque Control of Permanentmagnet Synchronous Motor Based on MATLAB/Simulink

The modeling of direct torque control system of p er manent-magnet synchronous motor based on MATLAB/Simulink was introduced, and th e simulation of the system was carried out to research on the effect of PI contr oller parameters on the system performances. Also, the relationship between torq ue hysteresis loop's width and torque ripple amplitude was analyzed. The result s show that the direct torque control system gives a good response to the rotati on speed and torque, and that the torque ripple amplitude decreases with the red uction of torque hysteresis loop's width. The PI controller parameters K p and K i should be properly matched to achieve excellent system performance , for a large scaling factor K p will accelerate the system's dynamic resp onse, while the integral coefficient K i mainly influences the system's st atic error.