Backup power supply system with a null transfer time

Backup power supply system with a null transfer time

A backup power supply system supplies power from a first ac power source in normal condition. Once the first ac power source is abnormal or fails, the system automatically turns off the first ac power source and turns on a second ac power source with null transfer time. When the first ac power sourc...

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Hauptverfasser: Feng, Ya-Tsung, Wu, Chin-Chang, Chou, Hung-Liang, Shen, Nan-Ying, Huang, Kuo-Fang, Chang, Yao-Jen
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Sprache:eng
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creator Feng, Ya-Tsung
Wu, Chin-Chang
Chou, Hung-Liang
Shen, Nan-Ying
Huang, Kuo-Fang
Chang, Yao-Jen
description A backup power supply system supplies power from a first ac power source in normal condition. Once the first ac power source is abnormal or fails, the system automatically turns off the first ac power source and turns on a second ac power source with null transfer time. When the first ac power source is normal, a dc/ac power inverter is controlled to supply an approximately null current such that a mechanical switch is allowed to be closed and no circulating current is generated between the first ac power source and the dc/ac power inverter. Since the mechanical switch is continuously closed, and requires no switching operation, the backup power supply system can supply the backup power with a null transfer time.
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title Backup power supply system with a null transfer time
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