一种直接转矩控制中降低转矩脉动方法的研究

Research on Strategy of Reducing Torque Ripple of DTC

针对传统直接转矩控制方法中存在的转矩脉动问题,把传统方法中的三阶转矩调节器改为五阶,在此基础上分别对传统方法中的电压矢量表进行修改,通过一种简单的占空比控制方法在某些非零电压矢量作用的采样周期中插入零矢量,从而有效降低了由于非零电压矢量作用时间过长而引起的转矩脉动;最后利用Matlab6.5/Simulink仿真软件进行仿真,并通过对比验证了改进方法的正确性和有效性。

To reduce the torque ripple of machine in conventional direct torque control strategy, according to duty control, a changed vector table was proposed in direct torque control based on the new ATR. The changed strategies of direct torque control can reduce the torque ripple largely. Finally the reasonability and validity of the changed strategy are testified by the simulation results based on Matlab 6. 5/Simulink.