Single Coupled Inductor-Switched Capacitor High Gain Bidirectional DC-DC Converter

This paper deals with a novel coupled inductor-switched capacitor high gain bidirectional DC-DC converter (CSBDC). The network configuration of a coupled inductor and switched capacitor allows high/low voltage conversion ratio of the boost/buck operation of the bidirectional converter having reduced turn’s ratio, thereby reducing the leakage inductance effect. This converter avoids core saturation by recycling the leakage inductance energy. The switch’s reduced voltage stress permits the use of switch with low R
dsON
value and mitigates the conduction loss of the converter. Further switching loss is reduced by operating in zero voltage switching (ZVS) condition. Using MATLAB, the suggested converter is simulated and validated the theoretical and simulation outcomes, with a 48V/380V, 250W experimental prototype.