Impulse Commutated Zero Current Switching Current-fed Three-phase DC/DC Converter

An impulse commutated current-fed three-phase dc/dc converter current divider topology for micro-grid application is proposed and analyzed. Resonance impulse commutation enables zero current turn-off of the semiconductor devices. Device voltage clamping is achieved without additional active-clamp or dissipative snubber and is load independent. Load voltage regulation and power flow control with input voltage variations are controlled by variable frequency modulation. Current-fed topology with inherent boost ability simplifies the transformer design by reducing the required turns ratio. The rectifier diodes also commutates with zero current without ringing. A comprehensive study of the proposed converter is reported together with the simulation results and experimental results. Simulation and experimental results verify the claims and demonstrate the converter's performance at steady-state.