Internal UPS card for a computer

Details Internal UPS card for a computer Internal UPS card for a computer

1999-03-12

2001-08-14

Ray, Gopal C. (Department: 2181)

Electrical computers and digital processing systems: support

Computer power control

C714S014000, C307S064000, C307S066000

Reexamination Certificate

active

06275946

ABSTRACT:

BACKGROUND OF THE INVENTION
Modern personal computers (PC) are increasingly used in companies, offices and by private users. Their failure or malfunction may cause severe and costly damage or expensive loss of data and information. Unfortunately, the quality of utility power does not guaranty reliable operation of personal computers. Outages, abnormal voltage and transients disturb or halt the operation, erase precious data and cause deterioration of components and hardware failures.
SUMMARY OF THE INVENTION
The present invention relating to an internal UPS card is designed to supply power to personal computers and monitors, such as super VGA color screens, and protect the computer and screen against all power disruptions including outages. This card is installed inside the computer, for example, in the conventional bus slots and requires only one or two bus slots, and has the power to back up both the computer and the monitor or screen. This is made possible by using a very small inverter that inverts for example a 12 V slim battery (about 20 mm) to high DC or AC voltage, typically 280 V, for DC or 220/110 V for AC, with high efficiency. The inverter functions at high frequency, 15 to 200 KHz, preferably about 25 KHz, and very high efficiency. This is achieved by using a low profile planar transformer such as a ferrite transformer and Mosfet transistors with very low Rds ON. The high-frequency step-up voltage from the output of the planar transformer is rectified by ultra fast or fast diodes. In this way we get a DC voltage output that can operate computers and monitors or screens. Similarly, an AC inverter with planar transformer can produce a high AC voltage. The computers and screens can function directly from the DC or AC power generated.
The UPS card of this invention preferably does not have a power switch of its own, but is turned on and off by the PC power switch, together with the computer. In this way it is easy to power up the card and simplifies to a minimum its installation, which takes less than 2 minutes with proper instruction. However, it is possible for the UPS to be activated by an independent on/off switch which may be located on the UPS card bracket.
The card can also be installed inside the PC power supply (SMPS) with little change of size and wiring.
The invention will be better understood with reference to the following drawings in which:


REFERENCES:
patent: 4184197 (1980-01-01), Cuk et al.
patent: 4675538 (1987-06-01), Epstein
patent: 4709318 (1987-11-01), Gephart et al.
patent: 4868832 (1989-09-01), Marrington et al.
patent: 4876460 (1989-10-01), Johnson
patent: 4890217 (1989-12-01), Conway
patent: 4977537 (1990-12-01), Dias et al.
patent: 5019717 (1991-05-01), McCurry et al.
patent: 5193176 (1993-03-01), Brandin
patent: 5229650 (1993-07-01), Kita et al.
patent: 5319571 (1994-06-01), Langer et al.
patent: 5430867 (1995-07-01), Gunji
patent: 5901057 (1999-05-01), Brand et al.
patent: 0433979 (1991-06-01), None
patent: 2 262 170 (1993-06-01), None
patent: WO 95/17777 (1995-06-01), None
patent: WO 96/38774 (1996-12-01), None
Cheng, D., “Design of a Switching Mode Power Supply with UPS Features”, Proceedings of the 1995 IEEE Tencon. Int'l Conference on Microelectronics and VLSI, Nov. 6, 1995, pp. 444-447, XP000884279, USA.
Pill, M., “Powerful Saviours”, ICL Today, vol. 6, No. 5, Feb. 1991, pp. 42-43, XP000884016, UK.
Harold, P., “Units Power PCs In Rough Times”, EDN, vol. 34, No. 11, May 1989, pp. 73-84, XP000877007, USA.
“Constraints of Power”, Communications Engineering, vol. 9, No. 6, Jul. 1987, pp. 19-27, XP0007884078, UK.

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