Uninterruptible DC power system
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United States of America Patent
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May 11, 2004
Grant Date -
Jul 10, 2003
app pub date -
Jan 10, 2002
filing date -
Jan 10, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed herein is a DC uninterruptible power system which is composed of a AC voltage and frequency detecting circuit, an AC to DC conversion and charging circuit, a DC voltage conversion circuit, a load detecting circuit, an output voltage detecting circuit, and a control circuit. The UPS of the present invention can minimize the power loss due to one stage conversion so as to improve system efficiency, and maintain a stable output voltage. Beside, a lighting equipment is installed for illuminating surroundings in case the utility voltage becomes abnormal.
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