Analysis of a multi-phase interleaved bidirectional DC/DC power converter with coupled inductor

Abstract

This paper proposes a novel multi phase interleaved bi-directional dc/dc power converter to interface two dc sources of different voltage levels which applied for energy storage systems in high power level. The converter is proposed to reduce the input and output ripples, as well as, the size of passive components once the voltage and current ripple in the filters are four times higher than the switching frequency. A coupled inductor is employed to equal current splitting between the switch branch of the converter and obtain higher power density, and to reduce conduction loss, applying a multi phase interleaving technique. The operation and theoretical analysis of the converter are presented with different modes of power transfer. Furthermore, the key operational principle and simulation results are presented showing the converter operation in both directions of the power flow.