Optimal design of multistepped air gap based on two phase 4/2 poles high speed switched reluctance motor
                                                                            ZHENG Yicheng, WU Jianhua
                                         (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: Aiming at the problem of torque dead zone and large torque fluctuation during the operation of traditional twophase 4/2 pole highspeed switched reluctance motor, it was analyzed that mathematical model of traditional switched reluctance motor and found that the impact factors of torque dead zone and torque fluctuation. And an optimization scheme of multistep stepped air gap design was proposed. According to the relationship between pole arc diameter and air gap inductance which was obtained by Matlab fitting, the optimal solution of the pole arc diameters of the stepped air gap was found. Finally, the motor operation of the stepped air gap switched reluctance motor model with different orders were compared and analyzed by using Maxwell 2D simulation. The results indicate that the optimal design of polar arc by multistepped air gap can effectively improve the operation of the traditional twophase 4/2pole switched reluctance motor and improve the operation quality.

Key words: switched reluctance motor; torque fluctuation; optimal design of polar arc; multistepped air gap