基于Saber的永磁同步电机直接转矩控制策略的比较仿真

Comparison and Simulation of Different Direct Torque Control Methods for Permanent Magnet Synchronous Motor Based on Saber

介绍永磁同步电机直接转矩控制理论,分析常规直接转矩控制方法由于采用滞环控制使一个采样周期内可选的电压矢量很有限,使磁链和转矩脉动较大,导致系统性能较差等问题,提出利用空间电压矢量调制来合成任意的电压矢量以改善系统性能。通过Saber仿真软件对两种控制方法进行仿真研究,给出仿真波形验证理论分析。

This paper begins with analyzing the theory of direct torque control on permanent magnet synchronous motor. In ordinary direct torque control system due to control of hysteresis - band few space vectors can be chosen in a sampling period, thereby the error of flux linkage and torque is a little big, and the performance of system is influenced. The paper proposed that a random space vector can be produced by means of space vector modulation, so that the performance is improved. Finally the model- ing and simulation of two strategies is introduced in saber, and the simulation results test and verify the analysis of the theory.