A quasi-Z source network with multiple switch-inductor cells and Cockroft-walton voltage multipliers

Abstract

This paper proposes a novel quasi-Z source network with multiple switch-inductor (SL) cells and Cockroft-walton (CW) voltage multipliers. The proposed topology can further enhance the boost ability as the increasing of the count of the cascaded SL cells and CW cells. The utilization of CW cells at the output side can greatly reduce the voltage stress of the diodes and active switch, which makes the topology more suitable for dc-dc power conversion where higher gain and lower voltage stress are demanded. The performance of the topology is analyzed and a scale-down 180 W prototype is implemented to verify the theoretical analysis.