Abstract
Nonisolated dc–dc converterswith multi-inputfeatures are very popular in the area of hybrid energy integration since they are compact and cost efficient compared to the isolated topologies. A dual-input hybrid step-up dc–dc converter (DIHDC) with a compact structure is introduced in this article. DIHDC operates based on the switched inductor technique. DIHDC has two inductors with equal values that are parallelly energized in the initial working modes (i.e., switch <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</small> condition) and dissipates the stored energy in series in the final working mode (switch <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> condition). Also, the proposed converter can be extended up to multiple inputs with slight modifications in the structure. Simple and compact structure, relatively higher efficiency, and good voltage conversion ratio are the potential merits of the new converter. Analysis of DIHDC in steady-state condition is explained elaborately and the simulation results are presented. Detailed dynamic analysis of the converter has been performed based on the small signal model of the converter and the necessary transfer functions are derived. A laboratory scale converter model is developed to confirm the efficient operation of DIHDC in realistic environments.
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