Method and system for maintaining full power during a power interruption in a multiple power supply system

摘要

A power supply system for providing power to a load is disclosed. The power supply system comprises a plurality of sources and a plurality of power supplies. Each of the plurality of power supplies has an input and an output. Each of the plurality of power supplies are coupled to one of the plurality of sources. One of the plurality of power supplies provides a power status signal. The outputs of the plurality of power supplies are coupled together. The power supply system includes a switching circuit coupled to the plurality of sources and receives the power status signal. The power supply system further includes a back up power supply. The back up power supply has an input and an output. The input of the back up power supply is coupled to the switching circuit. The output of the back up power supply is coupled to the output of the plurality of power supplies. The switching circuit monitors the power status signal and switches in the back up power supply when a power interruption occurs. With the present invention, full power is maintained in a power supply arrangement that includes parallel power supplies powered by separate AC sources via separate line cords. The aspects of the present invention provide an effective and efficient solution in a straightforward manner.