New evaluations on soft commutation range of a soft switching PWM boost DC-DC converter with edge-resonant switched capacitor modular

This paper presents a new investigation for a soft commutation performance of a soft switching PWM non-isolated boost DC-DC converter embedding an ER-SWC (Edge Resonant SWitched Capacitor) modular. The conceptual DC-DC converter treated here can achieve a high frequency ZCS turn-on and ZVS turn-off commutations in active switches and minimization of a reverse recovering current in the freewheeling diode under DCM (Discontinuous Conduction Mode) including CRM (CRitical Mode) in the input current. Those advantageous enable a wide range of soft switching operations together with a high stepup voltage conversion ratio. For demonstrating the wide-range soft switching operation performed in the soft switching PWM boost DC-DC converter, a 1[kW]-44[kHz] laboratory prototype is evaluated in experiments, then its performances are discussed from a practical point of view.