Abstract:The characteristics of excessive torque ripple of switched reluctance motor(SRM) has been the focus of research and solution in the development process of this type of motor. In order to suppress the torque ripple of switched reluctance motor and improve the torque control capability of the system, the direct instantaneous torque control strategy (DITC)of SRM is studied and improved in this paper. Based on the hysteresis DITC strategy and combined with the modulation characteristics of PWM, a unipolar PWM DITC strategy is proposed. The simulation results show that compared with the hysteresis DITC strategy, the unipolar PWM DITC strategy can effectively suppress the torque pulsation in the commutation region, and improve the torque control performance of the SRM drive system.