Projeto e Modelagem de um Conversor SEPIC com Alto Ganho de Tensão Baseado na Célula de Comutação de Três Estados

Abstract

This article discusses the proposition of a SEPIC DC-DC converter based on a three-state switching cell, with a focus on voltage conversion high rates. The application of this converter is to raise usual battery voltages to the common input voltages of inverters. Qualitative and quantitative analyses are carried out to expose the design of the components involved in the converter. Furthermore, for converter modeling for control application purposes, a methodology is used where the original converter is represented by an equivalent converter, based on the classic SEPIC topology. To validate the analytically obtained transfer functions, the ACSWEEP tool in the PSIM software was used to lift the transfer function of the equivalent converter and perform the comparison. Thus, it was shown that the analytical transfer functions can be used as a mathematical model of the converter in question.