Unexpected bi-directional operation of Phase-Shift Full-Bridge Converter in parallel operation system

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This paper discusses the effects of unexpected bi-directional operation of Phase-Shift Full-Bridge Converter in cold redundancy (CR). According to growing trends for high efficiency at light-load, cold redundancy method is strongly required in parallel operation system. However, because of unexpected backward operation, the voltage stress of primary switches is severely increased. In this paper, the period of mode change from normal operation to backward operation is investigated. The detailed operations in backward mode are described and the main factors of the severe voltage stress are analyzed. Furthermore, characteristics of switch to reduce higher voltage stress are also presented in terms of selecting switches. The validity of this study is confirmed by the experimental results of prototype 1.6kW converters.
Publisher
IEEE
Issue Date
2013-06-03
Language
English
Citation

ECCE Asia Downunder (ECCE Asia), 2013 IEEE, pp.999 - 1004

DOI
10.1109/ECCE-Asia.2013.6579229
URI
http://hdl.handle.net/10203/187706
Appears in Collection
EE-Conference Papers(학술회의논문)
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