Abstract: This paper presents a steady state analysis for a full-bridge zero-current-switching converter which introduces a suitable over-lap of work time between ahead switch and behind switch,permitting all switch to operate under zero-current-switching.Therefore,the switching wastage can be reduced.The average model is derive from the converter's steady state analysis.The system model can be developed from the converter's average model,and it has been simulated in Matlab and used toproduce the transient characteristics of the converter.The simulating re-suits show the fast operation of the control,which provide a good regulation.A arc welding inverter has been developed on this analysis,and the inverter has the excellent dynamic capabilities similar with the systemmodel.