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Title: High-Efficiency High-Density Critical Mode Rectifier/Inverter for WBG-Device-Based On-Board Charger

Journal Article · · IEEE Translations on Industrial Electronics
ORCiD logo [1];  [1];  [1];  [1]
  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
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We report 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 variations of input and output voltages. Design considerations of the ac/dc stage are presented in this paper, including: the evaluation of 1.2-kV SiC MOSFETs; the ZVS extension techniques to realize ZVS under all input/output variations; and a novel universal control strategy for both the rectifier mode and the inverter mode. A prototype is built which achieves 98.5% efficiency at a switching frequency higher than 300 kHz. Lastly, a 6.6-kW OBC system is demonstrated, using both SiC and GaN devices with 37-W/in3 power density and above 96% efficiency.

Research Organization:
Delta Products Corporation, Research Triangle Park, NC (United States); Delta Products Corporation, Durham, NC (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Contributing Organization:
Virginia Tech
Grant/Contract Number:
EE0006834
OSTI ID:
1644192
Alternate ID(s):
OSTI ID: 1429282; OSTI ID: 1644191
Journal Information:
IEEE Translations on Industrial Electronics, Vol. 64, Issue 11; ISSN 0278-0046
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 100 works
Citation information provided by
Web of Science

Cited By (2)

Onboard Charging DC/DC Converter of Electric Vehicle Based on Synchronous Rectification and Characteristic Analysis journal June 2019
DC-DC Converter Topologies for Electric Vehicles, Plug-in Hybrid Electric Vehicles and Fast Charging Stations: State of the Art and Future Trends journal April 2019

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Related Subjects

54 ENVIRONMENTAL SCIENCES
On-board charger (OBC)
power factor correction (PFC)
SiC
totem pole
widebandgap (WBG)
zero-voltage switching (ZVS)
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING