Driving Switched Reluctance Motor by Full-bridge Converter with Ring Structure

A switched reluctance motor (SRM) always uses asymmetric H-bridge as its power converter, this type of circuit makes the cost of the SRM driving system higher than the cost of the conventional motor drives. The full-bridge inverter is a good alternative topology for the power converter for SRMs, this type of circuit has tower costs and more driving methods for SRMs than the asymmetric H-bridge. A new driving topology that can drive SRM by full-bridge converter is proposed in this paper, based on an existing ring structure, the improved driving topology can make the circulating current controllable, then the unnecessary power loss is avoided. The proposed topology is also tested with simulation and validation, the results show that the new structure works well for the SRM.