Multiphase High Gain Boost Converter with Switched-Capacitor and Coupled-Inductor

This paper proposes a multiphase high gain boost converter with switched-capacitor and coupled inductor. The proposed converter employs an active snubber circuit, which is designed to absorb the transient spike generated by the coupled inductor leakage inductance, to reduce excess voltage stress and the peak to peak pumped capacitor transient current. The snubber circuits are designed to operate zero-voltage switching (ZVS) soft switching that can reduce power switching losses. This design uses multi-phase technology for the high gain boost converters to reduce power losses and save cost. This paper will introduce multiphase technology in the proposed high gain boost converter with the switched-capacitor and coupled inductor. Simulation and experimental results are used to verify validate the design and performance. The 400W multiphase high gain boost converter design was measured a 94.1% efficiency. The designed multiphase conversion architecture with the maximum power reach 1 kW and the average converter efficiency is over 90%.