Shuhao Cao

Analysis of Influence Factors of SRM Torque Ripple on Current Chopping Control Condition

In this paper, the influence factors of SRM torque ripple is analyzed using finite element calculation and magnetic circuit method, on condition of current chopping control. The air gap length, stator and rotor pole arc embrace and stator and rotor yoke thickness variations of switched reluctance torque ripple changes are discussed; simulation results show that: ① to the air gap length of the smaller torque ripple there is an optimum value; ② stator and rotor pole arc embrace of SRM torque ripple has an impact, turn increases the average torque with the stator and rotor pole arc embrace increasing, stator and rotor pole arc embrace in smaller numeric, torque ripple changes little, but when stator and rotor pole arc embrace are greater than certain value, with the stator and rotor pole embrace increasing, torque ripple increased largely. ③ stator and rotor yoke thickness on the SRM torque ripple has an impact, but little impact. With the stator yoke thickness increasing SRM torque ripple gets smaller; with the rotor yoke thickness increasing, SRM torque ripple gets larger.