NDLI: High frequency link DC-AC converter for UPS with a new voltage clamper

Content Provider	IEEE Xplore Digital Library
Author	Yamato, I. Tokunaga, N. Matsuda, Y. Suzuki, Y. Amaro, H.
Copyright Year	1990
Description	Author affiliation: Hitachi Ltd., Ibaraki, Japan (Yamato, I.; Tokunaga, N.; Matsuda, Y.)
Abstract	A power conversion system for a UPS (uninterruptible power supply) using a high-frequency link is described. The proposed UPS consists of a high-frequency inverter, a high-frequency transformer, and a cycloconverter with a new voltage clamper. The clamper effectively reduces the power loss of the conversion system. The voltage clamper gave an improved DC-AC conversion efficiency of about 10% more than when a conventional RC snubber was used. When source-commutation was used, DC-AC conversion efficiency was improved by about 5%. When the voltage clamper was used both DC-AC conversion efficiency and the output voltage characteristic without the automatic voltage regulator were improved to source commutation. Fabrication of a 10 kVA high-frequency-link DC-AC power converter is described and its loss reduction effect is demonstrated.
Starting Page	749
Ending Page	756
File Size	385519
Page Count	8
File Format	PDF
DOI	10.1109/PESC.1990.131264
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-01-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency conversion Uninterruptible power systems Voltage Switches Capacitors Diodes Filters Rectifiers Inductors Inductance
Content Type	Text
Resource Type	Article

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