一种新型永磁同步电动机的直接转矩控制方法

A Novel Direct Torque Control Method of Permanent Magnet Synchronous Motor

基于永磁同步电动机的转矩和磁链方程,介绍了一种改进的直接转矩控制方法。在该控制方法中,引入了一种新的电压空间矢量调制技术,这种调制技术的特点是把电动机的转速作为开关表的一个输入量,实现了定子电压空间矢量的精确选择,有效的降低了转矩、定子磁链和定子电流的波动。仿真实验结果验证了这种控制方法的有效性。

In this paper, an improved Direct Torque Control （DTC） for Permanent Magnet Synchronous Motor （PMSM） is proposed based the torque and flux equations of PWSM, The torque, stator flux linkage and stator current ripples are significantly decreased by introducing a novel kind of space vector modulation technique, The space vectors are determined by means of speed signals as an input of the switch table. The validity of the proposed method is demonstrated using simulation experimental results.