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http://dx.doi.org/10.6113/TKPE.2018.23.3.182

A New DC-DC Converter Topology For High-Efficiency Electric Vehicle Rapid Chargers  

Kim, Jin-Hak (Dept. of Electrical Engineering, Myongji University)
Lee, Woo-Seok (Dept. of Electrical Engineering, Myongji University)
Choi, Seung-Won (Dept. of Electrical Engineering, Myongji University)
Lee, Jun-Young (Dept. of Electrical Engineering, Myongji University)
Lee, Il-Oun (Dept. of Electrical Engineering, Myongji University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.23, no.3, 2018 , pp. 182-189 More about this Journal
Abstract
LLC resonant converters or phase-shift full-bridge converters have been widely used as DC - DC converters for rapid charging of electric vehicles (EVs). However, these converters present critical disadvantages, including a large circulating current, which can hinder efficiency and miniaturization in EV battery charger applications. In this paper, a new DC - DC converter topology is proposed for EV rapid chargers. The proposed converter can operate at high frequency despite a high rated power capacity of over 20kW, and the problem of circulating current can be minimized during the entire battery charging time. Owing to these advantages, the proposed converter can achieve a high conversion efficiency of over 97% for EV rapid charger applications. The performance of the proposed converter is verified with 20kW prototypes in this study.
Keywords
Electric vehicle rapid charger; LLC resonant converter; PSFB(Phase-Shift Full-Bridge) converter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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