A High-Voltage-Gain ZVS IPOS Bidirectional Converter

Abstract

A non-isolated bidirectional converter with high voltage gain is proposed. In the proposed converter, the structure of the input-parallel-output-series bidirectional converter is integrated with the coupled inductors. The features including high voltage gain, low voltage stresses, current sharing, and current-ripple-cancellation are achieved. Due to the proposed converter's operation in triangular conduction mode, the desirable benefits of zero voltage switching, diode reverse recovery elimination, and reduction of converter filter inductors and, consequently, leakage inductors are obtained. To recycle the leakage inductors' energy and solve the related difficulties for both operation modes, a simple passive clamp including the minimum number of elements is utilized. The proposed converter is analyzed and to confirm the analysis, the experimental results are presented.