基于SVM的开关磁阻电动机PID直接转矩控制

Direct Torque PID Control of Switched Reluctance Motor Based on SVM

针对一般开关磁阻电动机直接转矩控制采用滞环控制所存在的较大转矩脉动的问题,结合空间矢量调制(SVM)技术,提出一种基于SVM的开关磁阻电动机PID直接转矩控制的方法,转矩环采用PID控制,PID输出作为参考电压矢量,由于电压矢量与转矩近似成正比关系,故实现了转矩的连续控制。为了验证该方法的有效性,对开关磁阻电动机一般直接转矩控制及基于SVM的PID直接转矩控制进行了仿真,仿真结果表明基于SVM的PID直接转矩控制能够精确控制转矩,转矩脉动小于一般的直接转矩控制。

Combining the space vector modulation technology to solve the bigger torque ripple problem of the conventional direct torque control with the hysteresis loop control in this paper. A direct torque PID control was presented of switched reluctance motor based on SVM,which can control the torque continuously with the PID torque loop,because torque is approximately proportionate to the voltage vector determined by the torque PID controller. The simulation was accomplished to verify the validity of the proposed method of the conventional direct torque control and the direct torque PID control,the simulation results showed that the direct torque PID control based on SVM can control the torque accurately,torque ripple is less than the conventional direct torque control.