Active Clamped Dual Current-Fed Bidirectional DC-DC Converter for Wide Voltage Range Applications

This paper presents an active clamped dual current-fed (ACDCF) bidirectional dc-dc converter for the wide voltage range EV charging/discharging operation. This current-fed configuration supports minimizing the input/output current ripples of the converter. This configuration can be implemented as a dc-to-dc interface between different energy sources and storage technologies like supercapacitors, fuel cells, Li-ion batteries, photovoltaic panels, etc. In addition, the current-fed switching cell has been augmented with the active clamp circuits to suppress the turn-off voltage spikes. It helps in reducing the safe operation voltage limit, which eventually results in a selection of relatively low voltage switches with low on-state resistance. Furthermore, the converter is designed to operate in different modes using topology morphing control (TMC). This helps to extend the converter's operating and soft switching ranges. The component selection and converter design are briefly expressed, along with the theoretical assessment. Finally, the features of the proposed converter topology have been verified through simulations.