R Moeini - Department of Electrical Engineering, West Tehran Branch, Islamic Azad University, Tehran, IRAN
E Afjei - Department of Electrical Eng., Faculty of Electrical & Computer Eng., Shahid Beheshti University G.C., Tehran, IRAN
A Siadatan - Department of Electrical Engineering, West Tehran Branch, Islamic Azad University, Tehran, IRAN

Torque ripple is an inherent problem of SRM which should have been decreased. Several methods have been presented for torque ripple reduction in Switch ReluctanceMotor (SRM). Some of them are based on changing the structure and the geometry of the motor. The other methods are done byutilizing control techniques. This paper introduces a 6 by 4 threephase SRM as a normal mode structure which is designed by theSRM formula. The other modes of the SRM have been created bysmall changes in the dimensions of the normal mode. All of the modes are simulated by Finite Element Method (FEM). Next, thevalue of generated torque and torque ripple versus different rotor position are achieved. After that, the effect of the variationsin dimensions of the SRM is studied on the value of the generated torque and torque ripple and according to this information theoptimal structure is chosen. At the end, the optimal structure is constructed, tested in laboratory and the operational results areobtained.

SRM, FEM, Magneto Static Analysis