전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제20권5호
  • /
  • Pages.479-490
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  • 2015
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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전기자동차 탑재형 충전기 응용에서 위상변조 풀브리지 컨버터 성능 분석과 그 개선에 관한 연구

Research on the Analysis and Improvement of the Performance of the Phase-Shifted Full-Bridge Converter for Electric Vehicle Battery Charger Applications

  • Lee, Il-Oun (Department of Electrical Energy Engineering, Keimyung University)
  • 투고 : 2015.08.11
  • 심사 : 2015.09.21
  • 발행 : 2015.10.20
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초록

The conventional phase-shifted full-bridge (PSFB) converter with an LC filter has been widely used for high-power applications of over 1.0 kW. However, the PSFB converter cannot obtain optimal power conversion efficiency during the battery charging in electric vehicle (EV) on-board battery charger applications because of its unique drawbacks, such as a large circulating current and very high voltage stress in the rectifier diodes. As a result, the converters with a capacitive filter, such as LLC resonant converters, replace the PSFB converter in the EV chargers. This study analyzes the problems of the PSFB converter for EV on-board charger applications in detail. Moreover, the newest converters based on the conventional PSFB converter are reviewed. On the basis of the reviews, new PSFB converter topologies are proposed for EV charger applications. The new topologies are formed by connecting the rectifier stage in the PSFB converter with the output of an LLC resonant converter in series. Many problems of the conventional PSFB converter for EV charger applications can be solved and the performance can be more improved because of this structure; this idea is confirmed by an experiment consisting of prototype battery chargers under the output voltage range of 250-450 Vdc at 3.3 kW.

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참고문헌

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