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This paper presents the analysis of a DC-AC power converter using a zero-voltage-switching (ZVS) commutation cell. First, the authors show the cell applied to the buck power converter. The stages of operation are presented along with the main current and voltage equations. Next, they adapt the power converter to the regenerative-operation mode. Hence, the full-bridge power converter at low-frequency operation is connected in the DC-DC output stage (at high frequency). The main switches commute at zero voltage. The power converter operated at constant frequency with pulse-width modulation (PWM), and neither overvoltage nor additional current stress was observed by digital simulation. A design example and experimental results obtained by prototype, rated at 275 V and 1 kW, are also presented.
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Seixas et al. (1997) studied this question.
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