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A bidirectional isolated DC/DC converter as a core circuit for 3.3-kV/6.6-kV power conversion systems in the next generation.
- Source :
-
Electrical Engineering in Japan . Apr2008, Vol. 163 Issue 2, p75-83. 9p. 1 Black and White Photograph, 9 Diagrams, 3 Charts, 3 Graphs. - Publication Year :
- 2008
-
Abstract
- This paper describes a bidirectional isolated DC/DC converter considered as a core circuit for next-generation 3.3-kV/6.6-kV high-power-density power conversion systems. The DC/DC converter is intended to use power switching devices based on SiC and/or GaN, which will be available on the market in the near future. A 350-V, 10-kW, and 20-kHz DC/DC converter is designed, constructed, and tested in this paper. It consists of two single-phase full-bridge converters with the latest trench-gate Si-IGBTs and a 20-kHz transformer with a nano-crystalline soft-magnetic material core and litz wires. The transformer plays an essential role in achieving galvanic isolation between the two full-bridge converters. The overall efficiency from the DC-input to DC-output terminals is accurately measured to be as high as 97%, excluding gate drive circuit and control circuit losses from the whole loss. Moreover, loss analysis is carried out to estimate effectiveness in using SiC-based power switching devices. The loss analysis clarifies that the use of SiC-based power devices may bring a significant reduction in conducting and switching losses to the DC/DC converter. As a result, the overall efficiency may reach 99% or higher. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 163(2): 75–83, 2008; Published online in Wiley InterScience (<URL>www.interscience.wiley.com</URL>). DOI 10.1002/eej.20505 [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 04247760
- Volume :
- 163
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Electrical Engineering in Japan
- Publication Type :
- Academic Journal
- Accession number :
- 28699186
- Full Text :
- https://doi.org/10.1002/eej.20505