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A widebandgap-based bidirectional on-board charger (OBC) has been proposed with a variable dc-link voltage, which tracks the battery voltage fluctuation. Although this approach is deemed most efficient for the resonant dc/dc stage, it posts significant challenges for the rectifier/inverter stage, which operates in the critical mode to realize zero-voltage switching (ZVS), while subjecting to the large...
The wide-band-gap (WBG) devices based 6.6 kW bidirectional on-board charger (OBC) system for plug-in electric vehicles (PEVs) is recently developed. With the proposed novel variable DC-link voltage system architecture, high frequency soft switching operation, and integrated magnetics, the OBC system becomes more compact and more efficient compared to a Si-based counterpart. The design considerations...
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