Design of CRM AC/DC Converter for Very High-Frequency High-Density WBG-Based 6.6kW Bidirectional On-Board Battery Charger

Conference · Fri Jul 01 00:00:00 EDT 2016 · IEEE Energy Conversion Congress and Exposition (ECCE)

DOI:https://doi.org/10.1109/ECCE.2016.7855024· OSTI ID:1644200

Liu, Zhengyang ; Li, Bin; Lee, Fred C.; Li, Qiang

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 Sibased counterpart. The design considerations of the AC/DC stage are introduced in this paper including the evaluation of 1.2 kV SiC MOSFETs; the zero-voltage-switching (ZVS) extension function for the line-cycle ZVS operation; and the novel universal control strategy for both the rectifier mode and the inverter mode. The prototype of the AC/DC stage is built which achieves 98.5% efficiency at higher than 300 kHz switching frequency. Finally, the complete 6.6 kW OBC system using both SiC and GaN devices is demonstrated with 37 W/in3 power density and above 96% efficiency.

• Research Organization: Delta Products Corporation, Research Triangle Park, NC (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• Contributing Organization: Virginia Polytechnic Institute and State University
• DOE Contract Number: EE0006834
• OSTI ID: 1644200
• Journal Information: IEEE Energy Conversion Congress and Exposition (ECCE), Vol. 2016; Conference: 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, 2016; ISSN 2329-3721
• Publisher: IEEE
• Country of Publication: United States
• Language: English