| This thesis introduces a novel phase-shifted zero-voltage and zero-current-switching(ZVZCS) pulsewidth modulation full-bridge converter, which achieves zero-voltage-switching for the leading leg under a wide load range and zero-current-switching for the lagging leg over the entire line and load range. The converter has opened up the scope of soft switching, eliminated the idle current and this helps increase the efficiency.The thesis firstly analyzes the converter principle of operation and the circuit characteristic, used the PSPICE software to carry on the simulation analysis to the main circuit. Based on the small signal model foundation, has carried on the analysis and the design to the closed-loop control system. On the basis of theory analysis and simulation, developed the project prototype of 3KW battery charger for the power systems, the simulation and experiment results are given. Finally, the thesis introduced the system electromagnetic compatibility design as well as the system thermal analysis and the design.
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