Title :
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
fDate :
8/1/1989 12:00:00 AM
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;
Journal_Title :
Industrial Electronics, IEEE Transactions on
