基于SMC-SVPWM的PMSMDTC转矩脉动抑制研究

本文提出一个基于滑模控制(SMC)和空间矢量脉宽调制(SVPWM)技术对PMSMDTC转矩脉动抑制的新方法,采用滑模控制取代两个滞环比较器,得到交-直轴参考电压,用SVPWM技术调制参考电压。这样不仅可以解决滞环比较器的带宽导致的转矩脉动,还可提高精准度和响应速度,也能减小转矩脉动,仿真实验结果证明了此方法的有效性。同时还论述了PI控制器参数对系统性能的重要影响。

Research on Torque Ripple Suppression of PMSMDTC Based on SMC-SVPWM

This paper presents a new method of PMSMDTC torque ripple suppression based on sliding mode control(SMC)and space vector pulse width modulation(SVPWM).Sliding mode control is used to replace two hysteresis comparators to obtain AC-DC reference voltage,and SVPWM technology is used to modulate reference voltage.This method can not only solve the torque ripple caused by the bandwidth of hysteresis comparator,but also improve the accuracy and response speed,and reduce the torque ripple.The simulation results prove the effectiveness of this method.The important influence of PI controller parameters on system performance is also discussed.