基于SVPWM的DTC转矩脉动减小研究

DTC with torque - pulsation reduction based on SVPWM

针对感应异步电动机直接转矩控制DTC(DirectTorqueControl)系统存在转矩和磁链脉动的缺点,推导出一种新的减小脉动的控制方法。根据推导预测出所加的电压矢量,电压矢量由电压空间矢量脉宽调制(SVPWM)合成。给出了仿真波形,仿真结果表明该方法能有效控制磁链和转矩的脉动问题。

A new control method of induction motor is proposed to reduce the pulsation of motor torque and magnetic flux linkage,which is a great disadvantage existing in the DTC(Direct Torque Control) system . According to the deduction,the needed voltage vector is forecasted,which is modulated by SVPWM(Space Vector Pulse Width Modulation). The simulative results show that it effectively reduces the torque pulsation and magnetic flux linkage.