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A unit power factor DC fast charger for electric vehicle charging station

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5 Author(s)
Zuzhi Zhang ; Inst. of Electrical Engineering (IEE), Chinese Academy of Sciences (CAS), Beijing, China ; Haiping Xu ; Lei Shi ; Dongxu Li
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Widely applications of electric vehicle rely on popularization of charging station. With the increase in the number of charging station, the problem of grid pollution becomes worse and worse, and the charging hours must be decreased to raise the utilization rate of electric vehicle. This article proposes a novel unit power factor DC fast charger for electric vehicle charging stations. This DC fast charger, mainly used in fast-charging station, includes two modules: the input module is three-phase PWM rectifier and the output module is the phase-shift full-bridge converter. The two modules are controlled by only one DSP - TMS320F2812. The three-phase PWM rectifier overcomes traditional rectifier's shortcomings of low power factor and large harmonic, and is higher power than three-phase one-switch or two-switch power factor correction circuit. The phase-shift full-bridge converter is the isolated high-frequency DC-DC converter, and apt to be used in high power situation. Furthermore, the volume and weight of the proposed charger are decreased than conventional converter with grid-frequency transformer. A prototype of 10 kW Charger is constructed. The experimental results show that the novel DC fast charger has excellent electrical characteristics, and it can be applied to the electric vehicle charging stations.

Published in:

Power Electronics and Motion Control Conference (IPEMC), 2012 7th International  (Volume:1 )

Date of Conference:

2-5 June 2012