Mehdi Ranjkesh - MSc in the Faculty of Engineering, University of Guilan, Rasht, Iran
Esmael Fallah Choolabi - assistant professor in the Faculty of Engineering, University of Guilan, Rasht, Iran
Mojtaba Pourjafari - MSc in the Faculty of Engineering, University of Guilan, Rasht, Iran

nowadays the use of the Switched Reluctance Motors (SRMs) has been increased in various home and industrial applications considerably. Despite of many advantages of this type of motors such as simple structure, low cost, and high reliability, the main disadvantage of them is their high torque pulsation. This paper presents a novel method to optimize a typical SRM such that the torque ripple reaches its minimum value. Meanwhile, the torque average and the motor efficiency become maximum. It is shown that the pole width to the pole pitch ratio have a great impact on the torque ripple and torque average for both stator and rotor poles. Finite Element Method (FEM) was used to obtain the torque ripple, the torque average and the motor efficiency for a large number of ratios. A functional relationship was developed between the input and the output parameters. Then, the Particle Swarm Optimization (PSO) was used to find the optimum design.

Finite element, Particle Swarm Optimization, Switched reluctance motors