Power supply system

Details Power supply system Power supply system

1999-01-07

2000-09-05

Jackson, Stephen W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 71, 361115, H02H 300

Patent

active

061152250

ABSTRACT:
There is provided a power supply system which is capable of eliminating inconvenience affecting a storage device in the event of a power failure. Monitoring control means monitors supply voltage provided by a DC power supply connected to a power-supplied device and outputs a warning signal to transition means when the absolute value of the supply voltage becomes equal to or smaller than a predetermined voltage value. The transition means causes transition of the operative state of a storage device included in the power-supplied device to an operation terminated state. More specifically, if the storage device is a hard disk drive and the hard disk drive is performing write operation, the hard disk drive is caused to undergo operative state transition to a stable state in which the write operation has been terminated. Further, if the storage device is comprised of a working storage unit and a backup one, the operative state transition of the storage device is carried out such that the two storage units have identical data stored therein, followed by inhibiting the operation of the storage device.

REFERENCES:
patent: 5825708 (1998-10-01), Bennett

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