Effect of rotor geometry on performance of 6/4 switched reluctance motors

Abstract

This study investigates the effect of rotor geometry on performance in switched reluctance motors(SRM) using models analyzed by the 2-D Finite Element Method (FEM). All models have the samestator geometry, winding features, and air gap, but have different rotor geometries. The SRM modeloperates at nominal speed of 3000 rpm; with 6/4 pole and 150 W output power. Magnetic model analysiswas undertaken for the 3 different rotor models. Electrical performance characteristics; speed, phasecurrent, source current, efficiency, electromagnetic torque, and load torque were determined. Magneticflux density and flux lines in the stator and rotor and the current densities in windings are presented. Theoptimal rotor model for SRM was determined by considering electrical and magnetic performance data.