A novel edge resonant switched capacitor modular-assisted soft switching PWM Boost DC-DC converter for telecommunications energy

This paper presents a new prototype of a soft switching PWM non-isolated boost DC-DC converter embedding an edge-resonant switched capacitor (ER-SWC) modular. The conceptual DC-DC converter treated herein can achieve a high frequency ZCS turn-on and ZVS turn-off operations in active switches and minimization of a reverse recovering current in the freewheeling diode under Discontinuous Conduction Mode(DCM) partially including Critical Conduction Mode(CRM) in the input current. Those advantageous properties enable a wide range of soft switching operations together with a high step-up voltage conversion ratio. For demonstrating the effectiveness of the proposed soft switching PWM boost DC-DC converter following to describing its circuit design procedure, a 1 kW-40 kHz laboratory prototype is evaluated in experiments, then its performances are discussed from a practical point of view.