Methods and apparatus for pitch control power conversion
CA 2538578 C · Owner: General Electric Renovables Espana, S.L. · Inventors: Ridenour, Amy Marlene; Wanner, David Gerard, Jr.; Melius, Jeffrey Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for powering a pitch motor drive system (400) for at least one DC pitch motor (410) of a wind turbine (100) includes rectifying a voltage using a bridge circuit (402) to thereby supply a DC link voltage to a bridge (404) comprising active switching devices (406) and utilizing at least one link capacitor (408) to smooth the DC link voltage and act as an energy sink and source for the DC pitch motor or motors (410).
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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 March 2, 2006 and granted June 23, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.