Analysis, design, and performance evaluations of an edge resonant switched capacitor

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ANALYSIS, DESIGN, AND PERFORMANCE EVALUATIONS OF AN EDGERESONANT SWITCHED CAPACITOR CELL-ASSISTED SOFT-SWITCHING
PWM BOOST DC–DC CONVERTER AND ITS INTERLEAVED TOPOLOGY
ABSTRACT:
This paper presents a soft-switching pulsewidth modulation (PWM) non isolated boost dc-dc converter
embedding an edge-resonant switched capacitor (ER-SWC) cell and its interleaved circuit topology. The
conceptual boost dc-dc converter treated herein can achieve high-frequency zero-current soft-switching turn-on
and zero-voltage soft-switching turn-off operations in the active switches and minimization of a reverse
recovering current in the freewheeling diode under discontinuous conduction mode partially including critical
conduction mode in the input current. Those advantageous properties enable a wide range of soft-switching
operations together with a high-voltage step-up conversion ratio with a reduced current stress. Circuit design
guideline based on the soft-switching range is introduced; then, a theoretical analysis is carried out for
investigating the step-up voltage conversion ratio. For demonstrating the effectiveness of the ER-SWC softswitching PWM boost dc-dc converter and its newly developed interleaved topology, laboratory prototypes are
evaluated in experiments; then, their performances are discussed from a practical point of view.

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Analysis, design, and performance evaluations of an edge resonant switched capacitor

1. ANALYSIS, DESIGN, AND PERFORMANCE EVALUATIONS OF AN EDGERESONANT SWITCHED CAPACITOR CELL-ASSISTED SOFT-SWITCHING PWM BOOST DC–DC CONVERTER AND ITS INTERLEAVED TOPOLOGY ABSTRACT: This paper presents a soft-switching pulsewidth modulation (PWM) non isolated boost dc-dc converter embedding an edge-resonant switched capacitor (ER-SWC) cell and its interleaved circuit topology. The conceptual boost dc-dc converter treated herein can achieve high-frequency zero-current soft-switching turn-on and zero-voltage soft-switching turn-off operations in the active switches and minimization of a reverse recovering current in the freewheeling diode under discontinuous conduction mode partially including critical conduction mode in the input current. Those advantageous properties enable a wide range of soft-switching operations together with a high-voltage step-up conversion ratio with a reduced current stress. Circuit design guideline based on the soft-switching range is introduced; then, a theoretical analysis is carried out for investigating the step-up voltage conversion ratio. For demonstrating the effectiveness of the ER-SWC softswitching PWM boost dc-dc converter and its newly developed interleaved topology, laboratory prototypes are evaluated in experiments; then, their performances are discussed from a practical point of view.