Electricity: power supply or regulation systems – For reactive power control
Reexamination Certificate
2008-05-27
2008-05-27
Sterrett, Jeffrey (Department: 2838)
Electricity: power supply or regulation systems
For reactive power control
C323S300000
Reexamination Certificate
active
11195198
ABSTRACT:
A method and apparatus are described for controlling the flow of power in each input line to a three phase AC inductive load in order to reduce the amount of VAR in the system, and thus increase the operational efficiency of the inductive load. Solid state relays are positioned in series in each of the three inductive load line inputs, and current allowed to flow to the inductive load only during the time during which the SSRs are in a conducting state. The calculation of VAR is achieved by processing data from each of the input lines using a separate controller boards each dedicated to each of the lines. The controller in turn, based on the calculated VAR, increments the time, either increasing or decreasing it from a predetermined value, during which the SSRs in that line remains in the non-conducting state.
REFERENCES:
patent: 3959719 (1976-05-01), Espelage
patent: 4052648 (1977-10-01), Nola
patent: 4064419 (1977-12-01), Peterson
patent: 4344025 (1982-08-01), Okuyama et al.
patent: 4348631 (1982-09-01), Gyugyi et al.
patent: 4379258 (1983-04-01), Sugimoto
patent: 4417190 (1983-11-01), Nola
patent: 4439718 (1984-03-01), Nola
patent: 4453122 (1984-06-01), Johnson et al.
patent: 4454462 (1984-06-01), Spann
patent: 4459528 (1984-07-01), Nola
patent: 4459529 (1984-07-01), Johnson
patent: 4581568 (1986-04-01), Fitzpatrick et al.
patent: 4677364 (1987-06-01), Williams et al.
patent: 4710692 (1987-12-01), Libert et al.
patent: 4767975 (1988-08-01), Unsworth
patent: 4780660 (1988-10-01), Shima et al.
patent: 4833628 (1989-05-01), Curran, Jr.
patent: 4912390 (1990-03-01), Curran, Jr. et al.
patent: 4950970 (1990-08-01), Davis, Jr. et al.
patent: 5075613 (1991-12-01), Fisher
patent: 5134356 (1992-07-01), El-Sharkawi et al.
patent: 5187427 (1993-02-01), Erdman
patent: 5241256 (1993-08-01), Hatanaka et al.
patent: 5471127 (1995-11-01), Vaughan et al.
patent: 5637975 (1997-06-01), Pummer et al.
patent: 5684377 (1997-11-01), Kim et al.
patent: 5723966 (1998-03-01), Straka et al.
patent: 5818238 (1998-10-01), DeVilbiss
patent: 6104177 (2000-08-01), Fritsch et al.
patent: 6737827 (2004-05-01), Cashatt
Enviro World Technologies, Inc
Stainbrook Craig M.
Stainbrook & Stainbrook LLP
Sterrett Jeffrey
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