Analysis of variation in torque ripple in switch reluctance motor with design

The acoustic noise and vibration are major problems for Switched Reluctance Motor (SRM) to be used in electric vehicles, many industrial and household applications. Torque ripple is major cause of Acoustic noise and vibration in SRM. Discrete nature of current pulses applied to the motor causes ripple in the electromagnetic torque generated by a SRM. This Torque ripple can be reduced by design variation of stator/rotor magnetic structure of SRM, proper coordination of current pulses between incoming and outgoing phases. In this paper analysis vis-à-vis design for torque ripple variation has been carried out. Design optimization has been done with reduction in torque ripple from the original design. A V, U, m shape culvert´s are made at the unaligned position of rotor for the optimized design and torque ripple is analyzed. FEM analysis is used to determine torque variation.