Single-Input and Multiple-Output Based Boost Converter Including Nonisolated and Isolated Outputs

Abstract

Single-input and multiple-output dc-dc converters offer low cost and high-power density. Various configurations of these converters are reported in the literature. The major gap which is observed in the reported converters is that these converters are available either in isolated or nonisolated configurations. The converter which provides the isolated and nonisolated dc output is not available. In this paper, a Single Input Boost Hybrid Interlink Converter (SIBHIC) is proposed which includes two dc-dc boost converters. These converters are supplied by an input dc source. The nonisolated dc output is available across these boost converters. Complementary operation of the switches connected in adjacent boost converter leads to the production of high-frequency ac output voltage. These high-frequency output voltages can be rectified using a bridge rectifier including fast recovery diodes and can be used as an isolated dc output voltage. In this way, the proposed converter includes two nonisolated dc output ports and one isolated dc output port. Further, the complementary action of switches included in the adjacent dc-dc boost converters leads to a reduction in the magnitude of ripples in the source current. This leads to a reduction in losses and enhances the efficiency of the converter. Various operating modes, design method used to select various elements, and evaluation of the efficiency of SIBHIC is included in this paper. The validation of various functionalities of SIBHIC is carried out using experimental results captured on a laboratory prototype.