开关磁阻电动机直接转矩控制的研究

直接转矩控制(DTC)在交流电机驱动系统中是一种较完善的控制理论.事实证明它能很容易的控制电机的转矩和转速,并能减小转矩脉动.但是以前通常认为交流DTC方案不能应用于非正弦激励的SR电机.将直接转矩应用到开关磁阻电机的控制上,解决了SR电机转矩脉动问题.仿真及实验结果表明,这种控制策略不但可以有效地抑制SRM转矩脉动,同时控制简单、实时实现时只用低成本的微处理器即可.

Study on Direct Torque Control of Switched Reluctance Motor

DTC is a well established control principle for ac motor drives. It has been shown to provide a simple solution to control the torque and the speed of the motor and to minimize torque ripple. However, the SR motor which has non-sinusoidal excitation has not been seen as conductive to conventional ac machine DTC theory. In this paper, a novel DTC methodology is directly used to control torque of the SR motor. It can been seen from the simulation results that this scheme has well regulated the torque output of the motor within hysterisis band. Furthermore, the scheme is very simple and can be implemented with low cost micropocessor hardware.