Motor power factor controller with a reduced voltage starter
CA 1182518 A · Owner: National Aeronautics And Space Administration · Inventors: Nola, Frank J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A power factor type motor controller in which the conventional power factor constant voltage command signal is replaced during a 5 to 30 second starting interval with a graduated control voltage. A ramp generator 174 provides an initial ramp-like signal which replaces a constant power factor signal supplied by potentiometer 70. The ramp-like signal is applied to terminal 40 where it is summed with an operating power factor signal from phase detectors 32, 34, and 36 to thereby obtain a control signal for ultimately controlling SCR devices 12 14, and 16 to effect a gradual turn-on of motor 10. The SCR devices are turned on at an advancing rate with time in response to the summed or …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.