Novel Zero-Current Switched Quad-Boost High Gain DC-DC Converter

This paper proposes a new SEPIC-based ZCS high gain boost converter. The novel topology ensures soft-switching of active switch and output-side diodes. Achieving high voltage gain and efficient power conversion are the critical requirements in converters for RES applications. Switching losses in active switch and diode reverse recovery losses are two common factors for reduced efficiency in many of the converters reported in the literature. These losses are alleviated by soft-switching in the proposed converter, and the quadratic-boost input stage ensures high gain along with the VMC. A three-winding coupled inductor is used in the power circuit to enhance the boost factor further. The proposed Quad-Boost-Quasi-Resonant-SEPIC (QBQRS) converter is analyzed in detail, including the loss distribution among the converter’s components, and compared with similar converters. The converter has lower active switch stress and aggregate diode voltage stress compared to similar topologies reported in the literature. Finally, the concept of the proposed converter is verified through MATLAB-Simulink simulation studies.