A High Gain Hybrid non-isolated Magnetically-Coupled Switched-Inductor Converter

In this paper, a novel high gain hybrid non-isolated magnetically-coupled switched-inductor dc-dc converter (HSIM) is proposed, which inherits advantages of both coupled and switched inductors dc-dc converters. The topology is derived from the classical tapped inductor boost converter by combining it with the hybrid switched inductor converter. Apart from the high voltage conversion ratio, the proposed topology can obtain soft-switching conditions and recycle the energy of leakage inductance through a voltage clamp circuit, resulting in a higher efficiency. On the cut off period of the rectifier diodes ZCS is achieved, which mitigates the reverse recovery process of the diodes. The main switch of the converter operates in ZCS at the turn on moment, resulting in lower switching losses. The operation principle, the states and the steady-state analysis of the converter are presented. A HSIM prototype was build and tested to verify the theoretical analysis. Preliminary simulation and experimental results are given which prove that the novel proposed topology is a possible candidate for high gain dc-dc conversion.