Discrete position estimator for a switched reluctance machine using a flux-current map comparator
CA 2076080 A1 · Owner: General Electric Company · Inventors: Lyons, James Patrick; Macminn, Stephen Richard; Preston, Mark Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RD-21,053, DISCRETE POSITION ESTIMATOR FOR A SWITCHED RELUCTANCE MACHINE USING A FLUX- CURRENT MAP COMPARATOR, Abstract, A rotor position estimator for a switched reluctance motor (SRM) employs a flux-current map to determine whether the actual rotor angle is closer to or, farther from, axial alignment of stator and rotor poles than a reference angle .theta.r. The flux-current map is a plot of reference flux ?r as a function of current for the reference angle .theta.r. If a flux linkage estimate ?i is greater than the reference flux ?r, then the actual rotor angle is closer to alignment than the reference angle .theta.r and the flux-map, comparator output is a logic level one. If the flux …
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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 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2014.
- 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
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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.