A method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine with permanent magnet rotor
CA 2315622 A1 · Owner: Nygren, Jan-Anders · Inventors: Nygren, Jan-Anders; Leijon, Mats; Berggren, Bertil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotating electric machine for direct connection to high-voltage networks in , which the magnetic circuit adapted for high voltage comprises a permanent magnetic rotor, stator and main and auxiliary flux control windings in operative relation. At least one of the windings is a conductor surrounded by a magnetically permeable, field confining insulation system.
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
- Filed September 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2020.
- 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.