Isolated double step-down DC-DC converter

Su Han Kim, Honnyong Cha, Hafiz Furqan Ahmed, Heung Geun Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

An isolated double step-down converter with high efficiency and high step-down function is proposed in this paper. Proposed converter employs one additional capacitor in the primary side. As compared to the conventional full-bridge converter, proposed circuit has double step-down feature with reduced voltage stress at the primary side of transformer. Moreover, voltage stress of three primary side switches is half of input voltage, and one is same as input voltage. Compared with conventional full-bridge converter it achieves high efficiency by improved ZVS range under the light-load condition. In addition to these, transformer saturation problem is automatically solved by additional capacitor and no additional circuit or control scheme is required to address this situation. A 1 kW experimental prototype is constructed to verify performance of the proposed converter.

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.
Pages2306-2311
Number of pages6
ISBN (Electronic)9788957082546
DOIs
StatePublished - 27 Jul 2015
Event9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia - Seoul, Korea, Republic of
Duration: 1 Jun 20155 Jun 2015

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
Period1/06/155/06/15

Keywords

  • Double step-down
  • full-bridge converter
  • phase-shift
  • transformer saturation
  • zero voltage switching

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