Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Reexamination Certificate
2001-05-31
2003-05-06
Nguyen, Matthew (Department: 2838)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
C307S067000, C363S102000
Reexamination Certificate
active
06559559
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates in general to power systems and in particular to a power system incorporating redundant, auxiliary power sources to provide high reliability power to critical loads. Electronic data processing (EDP) is an increasingly important part of current business operations. Computers are used in all aspects of modern business including conducting transactions, controlling production and maintaining data. If the computers are rendered inoperative, it can cost certain businesses on the order of millions of dollars per minute.
A known cause of computer failure is an interruption in the computer power source. Computers used for EDP are sensitive to power interruptions and even a brief interruption or fault can cause the computer to malfunction.
FIG. 1
is a graph of a Computer Business Equipment Manufacturers Association (CBEMA) curve, which has been adopted by the Institute of Electrical and Electronics Engineers (IEEE) as Standard 446-1987, indicating that a computer can tolerate a one half cycle or 8.3 ms power interruption. Power available from existing utility grids (industrial power) cannot meet the high power reliability requirement of modern computer equipment. A business operating and relying upon electronic data processing equipment cannot rely on industrial power given the numerous and lengthy interruptions. Accordingly, high quality power systems are required.
SUMMARY OF THE INVENTION
An exemplary embodiment of the invention is a power system including a first power source, a first DC bus coupled to the first power source and a second DC bus coupled to the first power source. A power conditioning device is coupled to the first DC bus and the second DC bus. A load receives power from the power conditioning device.
REFERENCES:
patent: 4719560 (1988-01-01), Ford
patent: 5646458 (1997-07-01), Bowyer et al.
patent: 5767591 (1998-06-01), Pinkerton
patent: 6011324 (2000-01-01), Kohlstruck et al.
patent: 6160722 (2000-12-01), Thommes et al.
patent: 6219623 (2001-04-01), Wills
patent: 6288456 (2001-09-01), Cratty
Cantor & Colburn LLP
Nguyen Matthew
Sure Power Corporation
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