On/Off Control of Boost PFC Converters to Improve Light-Load Efficiency in Paralleled Power Supply Units for Servers

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This paper proposes an on/off control of boost power factor correction (PFC) converters to improve the light-load efficiency in paralleled power supply units (PSUs) for servers. The proposed scheme operates the PFC stages of two paralleled PSUs alternately during one cycle of a 60-Hz ac input only at light loads. This improves the light-load efficiency without deteriorating the heavy-load efficiency by reducing load-independent losses such as capacitive turn-on and core losses. In addition, the proposed scheme alleviates the harmonic distortion by reducing the discontinuous conduction mode region. Experimental results from 1.6-kW PFC boost converters are shown to verify the proposed work.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2014-03
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.61, no.3, pp.1235 - 1242

ISSN
0278-0046
DOI
10.1109/TIE.2013.2258301
URI
http://hdl.handle.net/10203/193019
Appears in Collection
GT-Journal Papers(저널논문)EE-Journal Papers(저널논문)
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