Hybrid excitation topologies for three-phase mutually coupled reluctance machine with standard inverters

New winding configurations for mutually coupled salient pole switched reluctance machines (MCSRMs) have been proposed that enables the application of three-phase standard inverters for variable speed drives. The proposed topologies comprise phase windings carrying balanced three phase currents from standard inverters along with DC excitation coils in the stator slots. Both concentrated and distributed hybrid winding configurations are proposed and performances of these MCSRMs are compared with that of the conventional SRM under the same machine geometry and phase excitation levels. The analysis and results show that the proposed machine configurations with standard inverters are more suitable for low cost, variable speed drives with higher power densities and lower torque ripples compared to conventional SRM drives.