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RISS 인기검색어
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- 저자 : 오홍일(Heungil Oh) (검색결과 1 건)
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오홍일(Heungil Oh),권종원(Jongwon Kwon),박용만(Yongman Park),오드게럴(Odgerel),김희식(Hiesik Kim) 대한전기학회 2006 정보 및 제어 심포지엄 논문집 Vol.2006 No.1
An efficiency improving method for Uninterruptible Power Supply System(UPS) was developed by using OP-AMP based application circuits such as voltage detection device, current detection device and static switch control device. The efficiency improving algorithm was made by mixing the operating concepts of On-Line type UPS with the operating concepts of Off-Line type UPS. The UPS' inverter does not work if the UPS' output load current is not higher than the low load operating current which is about 0~30(%) of the UPS' output load capacity. The low load operating current is adjustable within the half of the UPS' output load capacity. If the UPS' output load current is rising over than the low load operating current, the UPS' inverter starts working and the inverter output power feeds to the loads of UPS. If UPS' input power breaks out while UPS' inverter does not operate because the load current is low, the inverter starts working within 4(㎳) with excessive output voltage which is ±8(%) of normal UPS' output voltage. Like these, UPS can continuously feeds power to it's load device and reduce power consumptions.
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