Boost clamped integrated DC/DC topologies with high step-up voltage gain

Abstract

High step-up voltage gain in DC/DC converters can be achieved by means of the voltage conversion ability of transformers and coupled inductors. Aiming to avoid the problems caused by the leakage inductance of the magnetics, this paper proposes the use of passive clamping circuits. The boost clamping is integrated with a set of isolated topologies forming a family of converters, named Integrated Boost-Isolated DC/DC converters. The method to generate such topologies is presented and discussed. The methodology is also briefly discussed to the buckboost converter. To further analyze the reliability of the method and the characteristics of the derived converters, the two Integrated Boost-Flyback converters have been evaluated. Experimental results obtained from laboratory prototypes proved the reliability of the integration methodology and also pointed out the Series Integrated Boost-Flyback converter as the strongest candidate for high voltage gain applications.