High Gain Non-isolated Interleaved Current-fed 3-Phase Partial Series Resonance Pulse Based ZCS Voltage Quadrupler

A three-inductor current sharing three-phase current-fed converter leveraging short pulse series resonance to facilitate zero-current switching (ZCS) and voltage clamping of the semiconductor devices is proposed and investigated while achieving high voltage gain. The converter exploits series resonance behavior during overlap between any two switching signals, which naturally reduces the switch current to zero in the outgoing switch assisting its zero current turn-off and voltage clamping eliminating the additional snubber requirement. Current-sharing three-inductor interleaved topology also results in reduced current stresses on the primary side and simpler gate driving requirements as the devices have common sources with the ground. Moreover, owing to the short resonance period, peak and circulating current in the converter are reduced resulting in lower conduction losses and lower current curating components. The proposed configuration facilitates output voltage regulation and ZCS by means of variable frequency modulation. Detailed analysis and design are reported. Simulation results are shown to validate the projected claims and confirm the feasibility and efficacy of the proposed converter operation.