Radial force reduction of Switched Reluctance Motor for EV application

Abstract

This paper presents the radial force reduction techniques of Switched Reluctance Motor (SRM) for Electric Vehicle (EV) application. Even though SRM has more advantages over other electrical machines, the higher torque ripple limits its application in the automobile industry. The radial component of the electromagnetic force generates torque ripple and vibration. In this paper, two different geometrical modifications, SRM with circular holes and SRM with rectangular windows on the rotor along the axial direction are proposed to reduce the radial force. The geometrical parameters of the SRM are obtained from the basic output equation. The static and dynamic analysis of conventional and proposed SRM configurations are presented and reported the results. Mass and mass moment of inertia of the motor are the key factors for the EV application. The mass of the rotor is calculated analytically and compared with the simulation results. The FEA analysis of conventional and modified 4 phase 8/6, SRM configurations is carried out using the electromagnetic design tool MagNet to verify the analytical results.