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Novel Half-Bridge Inductive DC–DC Isolated Converters for Fuel Cell Applications

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4 Author(s)
Yves Lembeye ; Grenoble Electr. Eng. Lab. (G2Elab), Univ. Joseph Fourier, Grenoble ; Viet Dang Bang ; Guillaume LefÈvre ; Jean-Paul Ferrieux

This paper proposes a new class of converters based on the inductive input converters for the design of a power electronic interface for fuel cell (FC) applications. After studying the half-bridge structure, two soft-switching dc-dc converters are analyzed: one operating in zero-voltage-switching (ZVS) mode and the other in zero-current-switching (ZCS) mode. The ZVS converter can overcome the drawbacks of the original structure but is more complicated. The ZCS converter cannot operate at duty cycles below 0.5, but is simpler and more suitable for FC applications. Flexible choice of components, low losses, high efficiency, and modular converter possibility are all interesting characteristics of these converters. Their operation principle and characteristics are presented in this paper. Experimental results on 2 kW converters of each structure validate the theoretical analysis.

Published in:

IEEE Transactions on Energy Conversion  (Volume:24 ,  Issue: 1 )