High Current Planar Transformer for Very High Efficiency Isolated Boost DC-DC Converters

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Abstract

This paper presents a design and optimization of a high current planar transformer for very high efficiency dc-dc isolated boost converters. The analysis considers different winding arrangements, including very high copper thickness windings. The analysis is focused on the winding ac-resistance and transformer leakage inductance. Design and optimization procedures are validated based on an experimental prototype of a 6 kW dcdc isolated full bridge boost converter developed on fully planar magnetics. The prototype is rated at 30-80 V 0-80 A on the low voltage side and 700-800 V on the high voltage side with a peak efficiency of 97.8% at 80 V 3.5 kW. Results highlights that thick copper windings can provide good performance at low switching frequencies due to the high transformer filling factor. PCB windings can also provide very high efficiency if stacked in parallel utilizing the transformer winding window in an optimal way.
Original languageEnglish
Title of host publicationProceedings of the 2014 International Power Electronics Conference
PublisherIEEE
Publication date2014
Pages3905-3912
DOIs
Publication statusPublished - 2014
EventIPEC 2014 : 2014 International Power Electronics Conference - Hiroshima, Japan
Duration: 18 May 201421 May 2014

Conference

ConferenceIPEC 2014
CountryJapan
CityHiroshima
Period18/05/201421/05/2014

Keywords

  • Planar Magnetics
  • High Current DC-DC Converter
  • High Efficiency
  • PCB windings

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