Uninterruptible memory backup power supply system using threshold value of energy in the backup batteries for control of switching from AC to DC output
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United States of America Patent
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Jun 20, 2000
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N/A
app pub date -
Dec 11, 1997
filing date -
Dec 11, 1997
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Abstract
A backup power system includes continuously powered memory (CPM) backup functionality integrated with uninterruptible power supply (UPS) backup functionality, for use with a computer system. Battery energy level is monitored to detect when a threshold energy level is reached. The threshold level is an energy level required to ensure a successful CPM backup operation. When a utility power interruption is detected, if the battery energy level is above the threshold, UPS operation is provided. When battery energy level reaches the threshold, CPM operation is provided.
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