초록 ▼

A computer-controlled, uninterruptable power supply system is disclosed. The system selectively operates from more than one input source of power, e.g., an AC input, an external DC input and internal batteries. The system is of the type which utilizes one or more switch mode converters and is especi

A computer-controlled, uninterruptable power supply system is disclosed. The system selectively operates from more than one input source of power, e.g., an AC input, an external DC input and internal batteries. The system is of the type which utilizes one or more switch mode converters and is especially suited for use in computer systems. The system monitors a number of functions under computer control and reacts automatically to the monitored functions to follow a programmed course of action. During start up, the system monitors prescribed functions and prevents power turn-on upon detection of prescribed faults. The system may communicate with a host computer, provide data thereto, and receive down-loaded parameters therefrom. Such down-loaded parameters may be used by the system to control operation of the system. The system determines the condition of internal batteries so that when operating from the batteries, the system is cognizant of how long it or a host may continue operating, and then reacts accordingly. The system includes at least one fan and a number of sensors which sense temperature at a number of locations in the system, and is capable of controlling fan operation and locating faults based on sensed parameters. The system comprises a watchdog circuit to monitor computer operation. The watchdog circuit and the computer periodically self test operation of the watch dog circuit. The system determines current drain by means of a current sense resistance which is a trace on a circuit board, and the system itself calibrates the sense resistance.

대표청구항 ▼

A power supply system for receiving at least an AC power signal and a DC power signal and therefrom supplying power to apparatus for sustaining normal operation of said apparatus, comprising: means for rectifying said AC power signal, when it is supplied to said system, and providing a rectified sig

A power supply system for receiving at least an AC power signal and a DC power signal and therefrom supplying power to apparatus for sustaining normal operation of said apparatus, comprising: means for rectifying said AC power signal, when it is supplied to said system, and providing a rectified signal; first regulating means for regulating said rectified signal and providing a first regulated DC signal; second regulating means for regulating a DC signal and providing a second regulated DC signal; control means for causing one signal of said DC power signal and said first regulated DC signal, when both said DC power signal and said AC power signal are supplied and one of them when only one of them is supplied, to be coupled to said second regulating means; said control means being settable to cause a preselected one of said DC power signal and said first regulated DC signal to be coupled to said second regulating means when both said DC power signal and said AC power signal are supplied.