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A flying-capacitor ZVS PWM 1.5 kW DC-to-DC converter with half of the input voltage across the switches

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2 Author(s)
E. Deschamps ; Dept. of Electr. Eng., Univ. of Blumenau, Brazil ; I. Barbi

This paper introduces an isolated flying-capacitor DC-to-DC converter which features half of the input voltage across the switches, zero-voltage-switching, operation at constant frequency, regulation by pulse-width-modulation, and low RMS current stress upon power switches. The complete operating principle, theoretical analysis, relevant equations and design example are provided in this paper. The experimental results of a 1.5 kW converter with 60 V, 25 A output. 600 V input, operating at 50 kHz switching frequency are also presented and discussed in the paper. The proposed converter is an alternative to the full-bridge ZVS-PWM DC-to-DC converter in high-input voltage applications

Published in:

IEEE Transactions on Power Electronics  (Volume:15 ,  Issue: 5 )