A simple method for improving input power factor of single-phase UPS

Jia You Lee, Win Inne Tsai, Yu Ming Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A simple method for improving the input power factor of a single-phase online UPS (uninterruptible power supply) by making the DC-bus capacitance as small as possible is proposed. A feedforward modulation scheme is provided for solving the rapid DC-bus voltage fluctuation problem due to insufficient filtering. A discrete-time model of the UPS with the proposed scheme and a design technique for the compensators are also developed. Finally, a laboratory prototype 1-kVA single-phase online UPS is set up to experimentally verify the predicted and analyzed results. The proposed UPS features a high input power factor, fast transient response, high efficiency, light weight, and small size.

Original languageEnglish
Title of host publicationIECON Proceedings (Industrial Electronics Conference)
PublisherPubl by IEEE
Pages830-835
Number of pages6
ISBN (Print)0879426888
Publication statusPublished - 1991 Dec 1
EventProceedings of the 1991 International Conference on Industrial Electronics, Control and Instrumentation - IECON '91 - Kobe, Jpn
Duration: 1991 Oct 281991 Nov 1

Publication series

NameIECON Proceedings (Industrial Electronics Conference)
Volume1

Other

OtherProceedings of the 1991 International Conference on Industrial Electronics, Control and Instrumentation - IECON '91
CityKobe, Jpn
Period91-10-2891-11-01

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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