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Development of 50kW High Efficiency Fast Charger with Wide Charging Voltage Range
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 Title & Authors
Development of 50kW High Efficiency Fast Charger with Wide Charging Voltage Range
Park, Jun-Sung; Kim, Min-Jae; Jeong, Heon-Soo; Kim, Joo-Ha; Choi, Se-Wan;
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 Abstract
In this study, a fast charger for electric vehicle with wide charging voltage range is proposed. To achieve high efficiency, three-level topologies are employed for the AC-DC and DC-DC converters. Given that the output range of the DC-DC converter in fast chargers is quite wide, the circulating current of conventional three-level converter will increase under low voltage condition. The proposed hybrid switching method mitigates this issue. When a coupled inductor is used on the output side, the circulating current is further reduced, and the switches , , , and achieve turning-off under the ZCS condition. Experimental results from a 50 kW prototype are provided to validate the proposed charger, and a rated efficiency of 95.9% is obtained.
 Keywords
Fast charger;T-type three-level inverter;Three-level dc-dc converter;Hybrid switching method;
 Language
Korean
 Cited by
1.
Development of 50kW High Efficiency Modular Fast Charger for Both EV and NEV, The Transactions of the Korean Institute of Power Electronics, 2016, 21, 5, 373  crossref(new windwow)
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