Torque Ripple Reduction of Wound Rotor Synchronous Motor using Rotor Slits

Abstract

This paper treats the method for reduction of torque ripple in Wound Rotor Synchronous Motor (WRSM) which is one of the alternative solution to Interior Permanent Magnet Synchronous Motor (IPMSM). The main reason for the torque ripple is mainly generated by the saturation of magnetic flux on only one side of pole shoes. Therefore, we propose a way to maintain average torque value and reduce the torque ripple by disperse the magnetic flux evenly using rotor slits and an asymmetric rotor. Optimization will be done by Response Surface Methodology (RSM). Design variables will be the length of slits and asymmetry length. An objective function will be torque ripple and a constraint is average torque value compared with the initial model. We validate it through finite element method (FEM).