Study On High-Power Full-Bridge Phase-Shifted Zvs Converter

Power converter is employed in airplane, communication and traffic and so on. With the development of Quasi-resonant technique and high-frequency technique , the full-bridge phase-shifted PWM ZVS converter is applied in low-voltage , high-current converter. Therefore it is necessary to study on it.The development actuality and the theory of the Full-bridge phase-shifted PWM ZVS converter are detailedly and wide-ranged described. The employment' s difference of leading-bridge and the lag-bridge' s ZVS, the duty cycle are analyzed and studied in this paper.Compared to the other second-side rectifier, it is concluded that the full-wave Rectifier is well adapted to the Low-voltage High-current DC-DC converter.The technique of the current-sharing circuit is studied, and the circuit adapted to primary one is designed.A 54V/30A Full-bridge phase-shifted PWM ZVS converter is designed on the base of the analysis and the study mentioned above, and the simulation of the circuit are employed.Through the carrying out of research works, it is helpful to understand the analysis, designation, modeling and simulation of ZVS converter, and to lay a foundation for the application of the Full-bridge phase-shifted PWM ZVS converter.