An LLC resonant converter has the advantages of simple structure and soft switching. It can enable bidirectional power transmission, but it is difficult to realize a normalized gain greater than one under backward mode (backward step-up mode). Cascaded dc/dc converters or topological changes solve this problem, additional switches components are required losses added. Without changing converter...

Abstract— This paper proposes a new high step-up DC-DC converter designed especially for regulating the DC interface between various microsources and a DC-AC inverter to electricity grid. The figuration of proposed converter is a quadratic boost converter with the coupled inductor in the second boost converter. The converter achieves high step-up voltage gain with appropriate duty ratio and low...

This paper suggests a novel LUO-type converter with high gain voltage for use renewable energy sources. The proposed model is constructed by fusing conventional LUO DC-DC two distinct circuits. It intended to six passive components and five diodes. suggested here achieves of seven times the supplied voltage. Significant dc without excessive duty cycle permits lower RDs-on MOSFET switches, resul...

A novel high step-up dc–dc converter for fuel cell energy conversion is presented in this paper. The proposed converter utilizes a multiwinding coupled inductor and a voltage doubler to achieve high step-up voltage gain. The voltage on the active switch is clamped, and the energy stored in the leakage inductor is recycled. Therefore, the voltage stress on the active switch is reduced, and the c...