Abstract
In recent years fuel cells have become prominent as a renewable source of energy to meet the society’s energy requirements. Isolated Full Bridge Boost topology was mostly used for fuel cell systems. To increase the efficiency of the converter for low voltage fuel cell applications many soft switching techniques were proposed. This paper presents detailed study and control of Zero current switching Isolated Full Bridge Boost DC-DC Converter (ZCS IFBC). Linear peak current mode control (LPCM) and Non- Linear Carrier Control (NLC) techniques were applied to the converter for regulating output voltage dynamics. Simulated results of converter with and without ZCS are presented. Losses and efficiencies at various loads are measured. The results show that losses are decreased and efficiency was increased from 62.4% to 96.5% at full load with ZCS technique and output voltage is regulated to 400V with LPCM and NLC control topology.
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