Method for injecting reactive power in an alternating current system, and inverter therefor
CA 2298784 A1 · Owner: Asea Brown Boveri Ag · Inventors: Stemmler, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for injecting a reactive power into an alternative current system, whereby, for at least one supply main (10) a , compensating voltage (Ucomp), with a phase displacement relative to the current flowing in the main (10) is produced and injected into the main (10). Said method is characterised in that a simplified compensation is obtained by the fact that the compensating voltage (Ucomp) is produced from a direct current by means of an inverter (11) comprising bridge-connected power semiconductors and capable of being switched off and the compensating voltage , (Ucomp) is series-injected directly into the main (10).
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 July 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 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.