The Developing Of A Novel Zero-voltage Zero -Current Switching Full Bridge Converted Using A Simple Transformer Auxiliary Winding

In this paper, a novel zero-voltage zero-current switching (ZVZCS) full-bridge DC/DC converter is presented to improve the previous circuit. The operation principle of previous topology has been analyzed at first. Since the ZVS effect of the previous converter's leading-leg IGBT cannot be realized very well in the light-load situation, the previous ZVZCS full-bridge converter was optimized. For the purpose of testing and validating the operating principle of improved ZVZCS full-bridge converter and all the analysis, the simulation of this novel ZVZCS full- bridge converter has been carried out with the software. With the purpose of charging up the electric vehicle's power storage battery which was used in 2008 Olympic Games, a prototype (10KW 130V/80A) adopting modified ZVZCS converter is designed and validated by experiment. Finally, the experimental results are provided to verify the principle of this novel ZVZCS converter. Index Terms: Full bridge (FB) converter, phase shift (PS), pulse width modulated (PWM), zero voltage switching (ZVS), zero current switching (ZCS)