Abstract
A novel converter topology for high-power battery charger applications is proposed in this paper. The topology adopts the integration structure of two full-bridge converters, which shares one leg of switching device called center-leg. The two full-bridge converters are placed in parallel on the primary side, and are driven in a phase-shift manner. The integrated form of two current-doubler rectifier is adopted on the secondary side, and it has full-bridge structure. With this structure, the proposed converter can overcome drawbacks of the conventional phase-shift full-bridge converter; narrow zero-voltage-switching range, large duty-cycle loss, and high component counts. The validation of the proposed converter is confirmed by the experiment with a prototype battery charger of 5.7 kW and 13.5 A.
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