Torque ripple minimization of switched reluctance machines through current profiling

The paper presents a novel method of profiling the phase currents to minimize the torque ripple of a switched reluctance machine (SRM). The method is a combination of machine design and control algorithm. The minimization is accomplished through three steps. The first step is to design a machine which has symmetric torque characteristics with a maximum flat portion. The second step is to find the required current profile through simulation. The third step is fine tuning the profile through coupled simulation of the machine in the finite element and the dynamic controller in the Matlab/Simulink environments. The coupled simulation takes into consideration of the nonlinearities, electrical loss, magnetic loss, and mutual coupling.