新型异步电机直接转矩控制策略

Research on New Method for Direct Torque Control of Aasynchronous Motor

针对异步电机直接转矩控制系统转矩和定子磁链的脉动问题,设计了基于电压空间矢量脉宽调制(SVPWM)策略的异步电机直接转矩控制系统的模型和实验装置与基于离散空间电压矢量调制(DSVM)的方法并在MATLAB/SIMULINK环境下对其进行了仿真。仿真结果表明,这2种方法都可以明显减小转矩和磁链脉动,改善系统的动、静态性能,并且响应速度快、运行平稳。

To solve the problem of torque and stator flux linkage ripples in direct torque control （DTC） for a permanent magnet asynchronous motor, the space voltage vector pulse width modulation （SVPWM） strategy in DTC and a method based on DSVM for asynchronous motor was designed.This paper carried a simulation with Matlab/Simulink and the results show that it significantly reduces the pulsation of torque and flux ripple, improves the performance of control system and fast response, smooth operation.