High step‐down/high step‐up interleaved bidirectional DC–DC converter with low voltage stress on switches

Abstract

A DC–DC bidirectional converter which has low voltage stress on its semiconductor elements is presented in this study. This study presents a novel interleaved coupled-inductor-based non-isolated bidirectional DC–DC converter which is able to provide a high voltage gain conversion ratio. The high voltage gain of the proposed converter is achieved through its symmetrical topology with coupled inductors in its structure. Based on the fact that the voltage of the high-voltage side is shared between the two separate modules of the converter, the voltage stress across the switches is decreased. There are two blocking capacitors in the primary side, which help the converter to have symmetrical topology. Also, the switching pattern of the proposed converter is simple and the converter is able to provide a single voltage gain for the whole range of duty cycle. The theoretical results are approved through the prototype of the converter for 400 W.