한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제25권1호
  • /
  • Pages.82-91
  • /
  • 2017
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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마일드 하이브리드 전기 차량용 2.5kW급 8상 양방향 컨버터에 관한 연구

Research on a 2.5kW 8-Phase Bi-directional Converter for Mild Hybrid Electric Vehicles

  • 임재우 (한양대학교 전자시스템공학과) ;
  • 김희준 (한양대학교 전자시스템공학과) ;
  • 최준삼 (서연전자 선행연구팀)
  • Lim, Jae-Woo (Department of Electronic Systems Engineering, Hanyang University) ;
  • Kim, Hee-Jun (Department of Electronic Systems Engineering, Hanyang University) ;
  • Choi, Jun-Sam (R&D Center, Seoyon Electronics Co., Ltd.)
  • 투고 : 2016.06.23
  • 심사 : 2016.12.07
  • 발행 : 2017.01.01
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초록

This paper is a study on the bi-directional DC-DC converter, one of the key elements of 48V-12V dual systems in mild hybrid electric vehicles. Mild hybrid electric vehicles require a bi-directional DC-DC converter that can efficiently transmit power in two directions between a 48V battery and a 12V battery. To develop a bi-directional DC-DC converter with better price competitiveness, upgraded fuel economy, excellent performance and smaller size, this study designed, produced and presented a circuit that improved on the existing one. In the proposed 8-phase bi-directional DC-DC converter, the size of the passive element was reduced through the 8-phase interleaved topology, whereas downscaling had previously posed a difficulty. This study also designed and produced a 2.5kW class prototype. Based on the proposed 8-phase interleaved topology, a size of 227.5 (W) * 172 (L) * 64.35 (H) was achieved. In the boost mode operation and buck operation modes, the maximum efficiency was recorded at 94.04 % and 95.78 %, respectively.

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참고문헌

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  9. G. Y. Choe, J. S. Kim, H. S. Kang and B. K. Lee, "Optimal Design of Interleaved Boost Converters for Fuel Cell Applications," The Korean Institute of Electrical Engineers of Publication, Vol.57, No.6, pp.1003-1011, 2008.
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  12. H. J. Kim, "Basic Interpretation of Switching Power I," Pnaschool, Seoul, pp.36-49, 2012.
  13. J. W. Lim, H. J. Kim, J. S. Choi, H. Y. Yeo and S. S. Kim, "A Study of a 2.5kW Multi-phase Bi-directional Converter for Mild Hybrid Electric Vehicles," KSAE Spring Conference Proceedings, pp.1330-1336, 2016.