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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers

ISO Journal TitleJ Korean Inst. IIIum. Electr. Install. Eng.
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Title A Study of Smart Uninterruptible Power Supply Capable High Efficiency Drive
Authors Tae-Wook Um
DOI http://dx.doi.org/10.5207/JIEIE.2013.27.5.061
Page pp.61-66
ISSN 1225-1135
Keywords Uninterruptible Power Supply ; Off-Line ; On-Line ; Smart UPS ; High Efficiency Drive System
Abstract In this paper, a control scheme with the capability of high efficiency, which is realized by predicting the conditions of a load power and an input power, is proposed for the uninterruptible power supply (UPS). Generally, on-line UPS system supplies a constant voltage and a constant frequency (CVCF). However, the efficiency of the On-line UPS system can be reduced due to the switching losses of semiconductor devices during the power conversion. The these losses are improved by the proposed smart UPS with the high efficiency drive system, which is realized by analysing and predicting the conditions of a load power and an input power.