Hybrid modulated universal soft-switching current-fed DC/DC converter for wide voltage regulation for PV/fuel cells/battery applications

A soft-switching extended secondary universal current-fed converter has been proposed, analyzed, and designed. The proposed converter accommodates wide source voltage range to cover several sources to interface through extended secondary circuit and hybrid modulation. Proposed fixed frequency hybrid modulation and design achieves soft-switching of semiconductor devices under all operating conditions. It is therefore suitable to be universally adopted for solar photovoltaic (PV), fuel cells, and battery applications. Current-fed technology is suitable for such sources (low voltage high current). Experimental results are illustrated to verify the claims and to show performance of the converter over wide input voltage range of 20 to 60 V with load variation.