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A strategic control scheme of phase-shift full bridge converter for improving light-load efficiency in server power system

  • Yeonho Jeong
  • , Jong Woo Kim
  • , Cheon Yong Lim
  • , Dong Kwan Kim
  • , Jae Il Baek
  • , Gun Woo Moon
  • Korea Advanced Institute of Science and Technology

Research output: Contribution to conferenceConference paperpeer-review

Abstract

The phase-shifted full bridge (PSFB) converter is widely used in the middle and high power applications such as a server power system. However, due to the newly required trend for high light-load efficiency, the PSFB converter has a limitation for light-load efficiency because of a large circulating current, core losses of the transformer and inductors, and the insufficiency ZVS energy of lagging-leg switches. To achieve high light-load efficiency in PSFB converter, the circulating current in the freewheeling mode and the core loss should be reduced. Therefore, this paper proposes the strategic control scheme employing the control scheme of the two-switch forward (TSF) converter. In addition, by applying the additional one gate signal and the expanded dead-time, the switching loss can be significantly reduced. To verify the proposed method, the prototype converter with 750W (12V/62.5A) is built and tested.

Original languageEnglish
Title of host publication9th International Conference on Power Electronics - ECCE Asia
Subtitle of host publication"Green World with Power Electronics", ICPE 2015-ECCE Asia
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages488-494
Number of pages7
ISBN (Electronic)9788957082546
DOIs
StatePublished - 2015.07.27
Event9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia - Seoul, Korea, Republic of
Duration: 2015.06.12015.06.5

Publication series

Name9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia

Conference

Conference9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia
Country/TerritoryKorea, Republic of
CitySeoul
Period15.06.115.06.5

Keywords

  • Capacitance
  • Core loss
  • Inductors
  • Logic gates
  • Power systems
  • Servers
  • Zero voltage switching

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