Implementation and Comparison Study of Single-Pulse and PWM control Method to Increase Regenerative Braking Efficiency for SRM

Abstract

Switched Reluctance Machine (SRM) is an electric drive that is often used in electric vehicles. In electric vehicles, regenerative braking is needed to minimize the energy wasted on conventional braking so that the wasted energy can be used for battery charging. Regenerative braking on SRM utilizes negative torque on the rotor when it moves away from the stator winding, so an appropriate control method is needed to get the optimum value of regenerative braking. The single-pulse method and the PWM control method are regenerative braking methods on SRM that are commonly used. The PWM control operation method includes magnetizing-freewheeling and magnetizing-demagnetizing modes. The single-pulse method is a method that gives one pulse at the time of excitation, then the PWM control method is a method that is carried out by providing a PWM signal during excitation. These two methods have very different characteristics. In this paper, we will present the results of a comparative trial between the two single pulse and PWM control methods at different speed variations, namely when the RPM is 1200, 1500, and 1800 to determine the efficiency of using regenerative braking on the SRM.