High-Efficiency Isolated Bidirectional Ac–Dc Converter for a Dc Distribution System
نویسنده
چکیده
The isolated bidirectional ac–dc converter is for the 380-V dc power distribution system to control the bidirectional power flow and to improve its power conversion efficiency. Here the high-side switches of the ac– dc rectifier employ IGBTs without anti-parallel diodes and SiC diodes. In addition, the low-side switches are consisting of two MOSFETs to reduce the conduction loss in the rectification mode. PLL system shows lower detection fluctuation and faster transient response than the conventional techniques. And CLLC resonant converter can operate under the ZVS for the primary switches and the soft commutation for the output rectifiers. A dead-band control algorithm for the bidirectional dc–dc converter is developed to smoothly change power conversion directions only using output voltage information.
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