Uninterruptible power supply apparatus including a control circuit that executes a first mode when supply of a first AC electric power from a commercial AC power supply is resumed at a time of discharge end
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United States of America Patent
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Oct 6, 2015
Grant Date -
Aug 30, 2012
app pub date -
Sep 25, 2009
filing date -
Sep 25, 2009
priority date (Note) -
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Abstract
In this uninterruptible power supply apparatus, even after electric power supply to a load stops due to prolonged power failure time, the operation of an inverter is continued, a DC power supply voltage is generated based on an output of the inverter, and a control circuit is driven by the DC power supply voltage. Therefore, when electric power supply from a commercial AC power supply is resumed during the stop of electric power supply to the load, electric power supply to the load is automatically resumed by the control circuit.
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