Excitation control apparatus for synchronous machine
CA 1284817 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Onitsuka, Naganori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Before a synchronous machine is connected with a line, the set value of a voltage setter is controlled so that the difference between the line voltage and the set value of the voltage setter is decreased to zero and a, field current is then controlled so that the difference between the set value and the output voltage of the synchronous machine is decreased to zero thereby, parallel-connecting the synchronous machine with the line.
Read the whole patent
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 June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 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.