Bidirectional High Step-up/down DC-DC Converter Utilizing Three-Winding Coupled Inductors

This paper proposes a new coupled-inductor-based interleaved converter with bidirectional power flow. In the proposed converter, by using a new arrangement of three winding coupled inductors, the voltage conversion ratio is increased and the current and voltage stress on switches is reduced. Considering that the proposed converter has a bidirectional operation, it can be operated as step-up and step-down converters. Since the proposed converter has interleaved switching pattern, the voltage stress on its switches has decreased. The proposed bidirectional circuit is analyzed theoretically, and the experimental results are provided to prove its superior performance.