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http://dx.doi.org/10.5370/KIEE.2014.63.8.1055

Power Loss Analysis of EV Fast Charger with Wide Charging Voltage Range for High Efficiency Operation  

Kim, Dae Joong (Dept. of Electrical and Computer Engineering, Ajou University)
Park, Jin-Hyuk (Dept. of Electrical and Computer Engineering, Ajou University)
Lee, Kyo-Beum (Dept. of Electrical and Computer Engineering, Ajou University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.63, no.8, 2014 , pp. 1055-1063 More about this Journal
Abstract
Power losses of a 1-stage DC-DC converter and 2-stage DC-DC converter are compared in this paper. A phase-shift full-bridge DC-DC converter is considered as 1-stage topology. This topology has disadvantages in the stress of rectifier diodes because of the resonance between the leakage inductor of the transformer and the junction capacitor of the rectifier diode. 2-stage topology is composed of an LLC resonant full-bridge DC-DC converter and buck converter. The LLC resonant full-bridge DC-DC converter does not need an RC snubber circuit of the rectifier diode. However, there is the drawback that the switching loss of the buck converter is large due to the hard switching operation. To reduce the switching loss of the buck converter, SiC MOSFET is used. This paper analyzes and compares power losses of two topologies considering temperature condition. The validity of the power loss analysis and calculation is verified by a PSIM simulation model.
Keywords
EV fast charger; High efficiency; Loss analysis; Loss calculation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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