A Wide Voltage Gain Active Switched Inductor and Passive Switched Capacitor DC-DC Converter with Very Low Voltage Stress

Abstract

Severa1 applications such as Fuel Cell vehicle, HVDC system, aero-space industry require dc-dc converters having higher voltage gain. To provide optimum solution, a novel non-isolated, non-coupled inductor type dc-dc converters is proposed. The proposed dc-dc converter evolved by integrating active switched network and multiple switched capacitor network. Through this design, following features are achieved: high voltage gain, lower current stress on active switches, lower inductor current, lower voltage stress across devices and lower voltage stress across capacitors. The developed converter exhibits higher voltage gain along with lower voltage stress contrasted with other active switched inductor topologies. The operational and design analysis of the proposed converter is discussed and comparative analysis with the existing topologies are presented. A prototype of 200 W is developed in laboratory for boosting 20 V to 200 V and experimentation is carried out to verify the design. Additionally, the proposed converter is also tested under dynamic condition which illustrates the robustness of the converter with parameter variation. The reported maximum efficiency of the converter is found equal to 92.45%. © 2023 IEEE.