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Economic UPS structure with phase-controlled battery charger and input-power-factor improvement

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3 Author(s)
W. -J. Ho ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; J. -B. Lio ; W. -S. Feng

A new single-phase uninterruptible power supply (UPS) scheme is proposed. Its advantages when compared with existing UPSs are: no transferring time; high efficiency; low implementation cost; and high power density. It mainly consists of a minimised power converter which is capable of providing specified constant output voltage, a phase-controlled battery charger and input power factor improvement. The experimental results of the developed prototype show superior performance

Published in:

IEE Proceedings - Electric Power Applications  (Volume:144 ,  Issue: 4 )