Soft-switched interleaved boost converters for high step-up and high power applications

This paper proposes a generalized scheme of new soft-switching interleaved boost converters which is suitable for high step-up and high power applications. The proposed converter is configured with proper numbers of series and parallel connected basic cells in order to fulfill the required output voltage and power levels, respectively. This leads to flexibility in device selection resulting in high component availability and easy thermal distribution. Design examples of determining the optimum circuit configuration for given output voltage and power level are presented. Experimental results from a 1.5 kW prototype are provided to validate the proposed concept.