A Novel Zero-Current Soft-Switching Converter for Switched Reluctance Motor Drives

A new zero-current-transition (ZCT) converter for switched reluctance motor drives is presented. The proposed ZCT converter possesses the definite advantages that both the main and auxiliary switches are operating with zero-current switching (ZCS), as well as minimum current and voltage stresses. It has simple circuit topology, minimum component count and low cost. The ZCT technique can significantly reduce the switch on or off losses by forcing the current to zero prior to its turn-on or turnoff. The proposed converter is especially advantageous for switched reluctance motor (SRM) drives demanding efficient regenerative braking, such as electric vehicle application.