Unbalanced magnetic force mitigation and torque ripple minimization in eccentric SRMs

In this paper a comprehensive method is introduced to redress Eccentricity Faults consequences. Two main effects of EFs include considerable increase in Unbalanced Magnetic Force (UMF) and torque ripple. Dependency of UMF and torque ripple on EF level is shown and the possibility of compensating them via controlling currents in facing poles is proved. These objectives are accomplished through a novel converter which controls currents in poles of every phase such that one pole is responsible for nullifying UMF and the facing pole is in charge of torque ripple minimizing. The control algorithm is analyzed in details and through Finite Element Method (FEM) and MATLAB/Simulink is implemented on a 6/4 Switched Reluctance Motor (SRM). Suggested method is designed such that there is no need to detect EF direction and type which makes it cost effective and practical for a wide range of SRMs and applications.