Interleaved soft-switching multilevel boost converter

Multilevel DC-DC boost converter which consists of an inductor based boost circuit and a switched capacitor circuit has high voltage gain and flexible output voltage. It is suitable for a low voltage power source such as fuel cells. However, in high switching frequency, multilevel DC-DC boost converter´s power conversion efficiency is reduced by switching loss. Against the problem, this paper proposes an interleaved soft-switching multilevel DC-DC converter. The efficiency of the proposed converter is improved compared with the conventional soft switching converter in high boost ratio. The operation of the proposed converter has been confirmed by circuit experiments and simulations.