Minimization of torque ripples in SRM drive using DITC for electrical vehicle application

This paper presents Direct Instantaneous Torque Control (DITC) technique for minimization of torque ripple in Switched Reluctance Motor drive. SRM is a unique choice as a drive system for EV application due to its robustness, high starting torque and wide speed range operation. But high torque ripple is a major drawback in SRM which is due to its double salient structure. In DITC torque is taken as a direct control variable on an instantaneous basis. In this paper hysteresis controller is used for controlling the torque in which torque is used as a reference variable. Look up table is used for estimation of phase torque with phase current and flux linkage as input parameter. In DITC torque is maintain within the hysteresis band by changing the switching states of phases. The dynamic performances of machine are discussed in terms of torque ripple with DITC in MATLAB/SIMULINK software.