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A high frequency, high efficiency bi-directional battery charger for Plug-in Hybrid Electric Vehicle (PHEV) is built with high voltage normally-off GaN-on-Si HFETs. The battery charger topology consists of a 500 kHz Full Bridge (FB) AD/DC stage and a 500 kHz Dual Active Bridge (DAB) DC/DC stage. The system functionality is verified and measured efficiency is 97% for the AC/DC stage and 97.2% for the...
In this paper, a plug-in electric vehicle battery charger is proposed based on SEPIC PFC and LLC topologies. In addition, a new approach in introduced to actively control the dc link voltage and track the maximum efficiency point of a LLC converter over the wide voltage range of the high voltage battery pack. Comprehensive circuit modeling and loss analysis at maximum efficiency point of LLC converter...
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