Integrated Multilevel Converter Topology for Speed Control of SRM Drive in Plug in-Hybrid Electric Vehicle

Abstract

A multilevel converter topology for switched reluctance motor (SRM) drive with integration of front end circuit is appealing for electric vehicle. As SRM carries the highlights like simple construction, high reliability, high fault tolerance capability and low production cost. However, the high torque ripples, running vibrations and acoustic noise are the major drawbacks in SRM. In proposed theory of a multilevel converter for five phase SRM drive overcome this drawbacks and flip it into advantages like high torque range, low torque ripple and vibration free response with flexible speed control. This paper represents a operating theory and simulation results of five phase muliltlevel converter for SRM drive. Which results, with increasing the number of phases the system performance is increase without increasing the number of switching devices and a comparison is shown based on torque speed characteristics of motor when fed from proposed converter and a asymmetric half bridge converter for different condition. This analysis states the proposed converter topology is advantages over the conventional converter topology, especially for the high speed response.