Method and regulator for electrical reluctance machines
CA 2300820 A1 · Owner: Andersson, Christer · Inventors: Stendahl, Henrik; Andersson, Christer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for estimating an instantaneous resistance in a phase winding in a reluctance machine. The process comprises the steps of: receiving a signal (Udm) indicating a voltage (UW) across at least one phase winding; receiving a signal (iWm) indicating a current (iw) through the phase winding; estimating a magnetic flux in response to the voltage signal and the current signal; estimating an instantaneous resistance (RW) in the phase winding in according with a phase relation between the current signal (iWm) and the magnetic flux signal (est). The invention also relates to a method for controlling an electrical machine and a drive system for performing 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
- Filed August 18, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 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.