Fast phase synchronization and retrieval of sequence components in three-phase networks
CA 2425496 C · Owner: Li, Chunlin · Inventors: Li, Chunlin; Dawson, Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method and system for fast retrieval of the sequence components from phase frequency and amplitude varying signals and synchronization therewith and the concept of a system on a chip for power signal processing. More specifically it relates to a method and system where the sequence components of a three-phase power signal are extracted and filtered in real time using a multirate phase- locked loop and a dual infinite impulse response filter with fault detection and reinitialization.
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 April 3, 2003 and granted June 5, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2025.
- 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.