| Abstract |
High torque ripple is one of the major disadvantages of Switched Reluctance Motor (SRM). It is very well known that stator and rotor pole shapes are the key factors determining the level of torque ripple. This paper, in particular, suggests an approach adjusting some parameters related with stator and rotor pole tip shapes aiming to reduce torque ripple. Basic premise of the proposed method is to modify inductance profile in order to modify torque profile by shaping stator and rotor pole tips. As a first step, magnetization characteristics and torque profile of a conventional SRM have been obtained by solving the associated Finite Element Model (FEM). Then, some pole tip parameters have been defined in an effort to obtain the lowest possible torque ripple. Finally, conventional and proposed SRM have been compared and the influence of the proposed pole tip shapes on torque ripple and other performance parameters have been discussed. Five different stator and rotor pole tip structures have been investigated and compared with conventional pole tip. It has been observed that one of the proposed tip shape is capable of decreasing torque ripple from 36% in conventional SRM to 11.9%. |
