Off-line uninterruptible power supply with zero transfer time using integrated magnetics

Author

Martinez, Sonia ; Castro, Manuel ; Antoranz, Rafael ; Aldana, Fernando

Author_Institution

Electron. & Control Dept., Univ. Nacional de Educ. a Distancia, Madrid, Spain

Volume

36

Issue

3

fYear

1989

fDate

8/1/1989 12:00:00 AM

Firstpage

441

Lastpage

445

Abstract

An offline uninterruptible power supply (UPS) or emergency power system with zero transfer time is presented. The principal application is to personal computers and systems. The power transformer, a triport-like transformer, acts as an inverter and as a voltage stabilizer with no external loading coil. It is made with commercial EI scrapless laminations. The battery charging circuit is integrated into the transformer and improves the dynamic output response during line-mode operation. The result is robust, short-circuit-proof equipment with harmonic distortion of lower than 3%, a static output stability better than 1.5%, and a very high reliability

Keywords

power transformers; uninterruptible power supplies; EI scrapless laminations; battery charging circuit; emergency power system; harmonic distortion; high reliability; integrated magnetics; inverter; line-mode operation; offline uninterruptible power supply; personal computers; power transformer; short-circuit-proof equipment; triport-like transformer; voltage stabilizer; zero transfer time; Application software; Batteries; Coils; Industrial power systems; Inverters; Lamination; Microcomputers; Power transformers; Robust stability; Uninterruptible power systems;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.31508

Filename

31508