Simultaneous Torque and Radial Force Ripple Control for Reduction of Acoustic Noise and Vibration in Switch Reluctance Machines

SRM has high torque and radial force ripple, as a result it has the disadvantages of large vibration and acoustic noise compared to other types of electric machines. This paper introduces a new torque ripple and radial force ripple reduction technique which generates optimum current profile using multi objective optimum control algorithms. Electromagnetic Finite Element Analysis have been performed to develop SRM model for predicting the torque and radial force generation. The proposed current profiling technique develops off-line current shaping aiming to reduce both the torque ripple and the radial force ripple simultaneously. 2D and 3D Multi-physics simulations have been performed to evaluate the vibration and acoustic noise performance of the SRM drive operating with conventional and proposed optimal current waveforms. Simulation results proved that the proposed current profile can reduce the vibration and acoustic noise significantly.