关键词: 开关磁阻电动机, 直接转矩控制, 转矩脉动, 占空比控制

Abstract:

In view of the inherent torque ripple of switched reluctance motor, the direct torque control(DTC) method was adopted to reduce torque ripple. In order to reduce the torque ripple, an improved method for optimizing the duty ratio of voltage vector was proposed. Both torque error and flux linkage error were used to calculate the duty ratio of non-zero voltage vector, which can strengthen the suppression of torque ripple and maintain the simple structure of DTC. Finally, the corresponding simulation model was built in the MATLAB/Simulink environment. The simulation results show that the direct torque method based on optimized duty ratio regulation has stronger ability to restrain torque ripple.

Key words: switched reluctance motor(SRM), direct torque control(DTC), torque ripple, duty ratio control