Study of Dynamic Energy Interpolating Circuit for Quasi-On-Line UPS

• Main Authors: Horng-Jye Lin, 林鴻杰
• Other Authors: Jia-You Lee
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/60868861858701400819

碩士 === 國立成功大學 === 電機工程研究所 === 84 === In this thesis, a dynamic energy interpolating ircuit is proposed to substitute for the static transferwitch (STS) of the off-line UPS's. This circuit is ableo provide the output for off-line UPS's about 4 milli-econds while a blackout occurs but the inverter doesn'ttart to take over the UPS output yet. It means that theff-line UPS with dynamic energy interpolating circuitill have the feature of zero transfer time switching fromhe line mode to the inverter mode. This circuit consistsf a transformer booster and AC capacitors which areesonant with each other in the utility frequency. Thewitched-capacitor technique is included to overcome theoltage drop of the resonant circuit for achieving theominal output voltage after utility blackout. One methodf detecting the blackout point is also introduced.