改进型异步电动机直接转矩控制方法的仿真研究

Simulation Research about a Modified Direct Torque Control Method for Asynchronous Motor

在研究空间电压矢量调制 (SVM)方法和传统的异步电动机直接转矩控制方法后 ,得到了一种改进型异步电动机直接转矩控制方法。与传统的直接转矩控制方法相比 ,该方法有着转矩和磁链脉动大为减小的特点。此外 ,还给出了一种独特的异步电动机直接转矩控制动态问题的处理方法。仿真表明 ,采用改进型异步电动机直接转矩控制方法除了能使转矩和磁链脉动大为减小外 ,还有着和传统直接转矩控制一样好的动态性能。

This paper describes a modified control scheme for direct torque control of induction motor after analyzing Space Vector Modulation (SVM) method and traditional direct torque control scheme. This modified scheme features in low torque ripple and low flux ripple, compared with the traditional direct torque control scheme. Besides, a unique method for dynamic performance is proposed. Simulation shows the flux and torque ripples are greatly reduced, at the same time, the good dynamic performance of the traditional direct torque control method is retained.