| 摘要 |
A power backup system includes a temporary power supply system and a power source switch unit. The power backup system is connected to at least one regular power supply system. In the event that output power of the regular power supply system is abnormal the power source switch unit is connected to the temporary power supply system and output of the regular power supply system. When the regular power supply system is in normal operation it is selected to provide power to drive loads. In the event of power interruption, unstable voltage or abnormal operating condition of the regular power supply system an action to switch power supply system takes places to select the temporary power supply system to maintain power supply and keep the loads to function for a selected time period.
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