Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2005-10-11
2005-10-11
Duda, Rina (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S434000, C318S805000, C318S727000, C323S210000, C323S211000, C323S205000
Reexamination Certificate
active
06954046
ABSTRACT:
One embodiment of the present invention is a method to control input to an alternating current (AC) induction motor from a power supply that includes steps of: (a) determining a measure of reactive power (VAR) in two input lines to the motor during a time period; and (b) maintaining an SSR (solid state relay) connected in series between the power supply and the motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR.
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: 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
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: 5684377 (1997-11-01), Kim et al.
patent: 5723966 (1998-03-01), Straka et al.
patent: 5818238 (1998-10-01), DeVilbiss
Duda Rina
Enviro World Systems, Inc.
Johnson Larry D.
Johnson & Stainbrook LLP
Stainbrook Craig M.
LandOfFree
Method and apparatus to control input to AC induction motors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus to control input to AC induction motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to control input to AC induction motors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3465186