Title :
The ZVS-PWM commutation cell applied to the DC-AC converter
Author :
de Seixas, Falcondes Jose Mendes ; Martins, Denizar Cruz
Author_Institution :
Univ. of Sao Paulo State, Brazil
fDate :
7/1/1997 12:00:00 AM
Abstract :
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
Keywords :
DC-AC power convertors; PWM invertors; bridge circuits; circuit analysis computing; circuit testing; commutation; switching circuits; 1 kW; 275 V; DC-AC power converter; ZVS-PWM commutation cell; buck power converter; computer simulation; design example; experimental results; full-bridge power converter; regenerative-operation mode; zero-voltage-switching; DC-DC power converters; Digital modulation; Digital-to-frequency converters; Equations; Frequency conversion; Frequency modulation; Pulse width modulation; Pulse width modulation converters; Switches; Zero voltage switching;
Journal_Title :
Power Electronics, IEEE Transactions on
