Simulation on direct torque control of 8/6 switched reluctance motor based on Simulink

YU Xiao-chen， WANG Jia-jun， SONG Xiao-chuan
（School of Automation， Hangzhou Dianzi University， Hangzhou 310018， China）

Abstract： Direct torque control（DTC） can effectively reduce the torque ripple of switched reluctance motor（SRM），but the current direct torque control method of three-phase switched reluctance motor can not be applied to arbitrary phase SRM. In order to realize the direct torque control of four-phase 8/6 SRM，based on the analysis of the mathematical model of SRM，the basic principle of DTC of SRM was introduced，and the simulation model of DTC of 8/6 SRM was built in Matlab/Simulink environment. On the basis of the states of the power conversion circuit，the selection rules of voltage vector were given，the calculation method of flux vector and the judgement method of flux sector were introduced，and the switch table was built through 2D lookup table in Matlab/Simulink. Finally， the model was simulated with speed PID control. The results indicate that the proposed method is correct and effective.
Key words： four-phase 8/6 switched reluctance motor（SRM）； direct torque control（DTC）； voltage vector； sector judgment