A Wide Input High Gain DC-DC Converter

Abstract

DC-DC converters are typically required in fuel cell vehicles to boost the output voltage to match the bus voltage. To obtain the high utilization of fuel cell, the general practice is to reduce the voltage stress on the switching transistors and the ripple of the output voltage. Based on the Boost topology and Buck-Boost topology. The converter adds a capacitance multiplier unit to the post-stage circuit to obtain a higher output voltage with a corresponding reduction in voltage stress on the switching transistors. At first, the operating principle of the converter in both operating modes is studied. Then, the components in its circuit are designed. Simulation experiments using MATLAB software, the final result can prove that the converter can improve the voltage gain.