MODELING AND ANALYSIS OF A DC-DC BOOST-BUCK CONVERTER FOR RENEWABLE ENERGY APPLICATIONS

DANIEL WESTERMAN SPIER; GERMÁN G. OGGIER; SÉRGIO AUGUSTO OLIVEIRA DA SILVA

Congreso; 14th Brazilian Power Electronics Conference (COBEP); 2017

In this paper a small-signal modeling of theDC-DC boost-buck converter is presented, whoseattractive feature is that both input and output currentscan be controlled through different duty cycles applied ineach leg, which defines the proposed modulation strategy.This switching sequence is composed of three differentstates, which gives the basics to obtain the equivalentsmall-signal equations, the equivalent small-signal circuitand the transfer functions of the converter. Simulationresults validate the model through time domain responsesand frequency domain.