Variable-speed power generating system
CA 1279368 C · Owner: Yasaka, Yasuhiro · Inventors: Oono, Yasuteru; Nakagawa, Hiroto; Nagura, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A variable-speed power generating system comprises a variable-speed generator electrically connected at its primary winding to an electric power system and at its secondary winding to the electric power system through a frequency converter and mechanically coupled to a driver driving the secondary side thereof a phase detector generating an output signal representing a slip frequency in response to the application of a first input having a frequency component of an output generated from the primary winding of the variablespeed generator and a second input having a frequency component corresponding to the rotation speed of the driver, a controller controlling the frequency converter on the …
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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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.