direct instantaneous torque control for switched reluctance motor

 

 

ZHAO Chao, WANG Jiajun, WANG Hao

 

(School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China)

 

 

Abstract: Aiming at the high torque ripple of the switched reluctance motor (SRM), the direct instantaneous torque control (DITC) scheme and the advanced direct instantaneous torque control (ADITC) scheme which composed of the DITC and the PWM control method were presented in the paper. The operational principle of DITC and ADITC were analysed. According to the rotor position, the phase winding inductance was divided into three intervals. As the focus of DITC and ADITC, the torque hysteresis controller was implemented through programming at every interval. The control simulation models for the fourphase 8/6 SRM were built up in Matlab/Simulink environment. The instantaneous feedback torque was obtained through the lookup table, which shows the relationship between the phase current, rotor position and torque. The results indicate that the proposed two methods can all reduce the inherent torque ripple, but the ADITC scheme is proved to be more excellent.

 

Key words: switched reluctance motor(SRM); direct instantaneous torque control(DITC); advanced direct instantaneous torque control(ADITC); simulation