Reactive power control apparatus
CA 1106444 A · Owner: Asea Aktiebolag · Inventors: Juhlin, Lars-Erik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, An improved reactive power control for a static convertor wherein the improved control compensates for voltage transients caused by the connection and disconnection of reactance elements in an AC convertor network by making corresponding transient adjustments in a normal control angle of the convertor. A maximum angular increment in the direction of 90° is applied to the normal control angle when the AC reactance switching occurs. If a capacitive reactance element is connected to the AC network, the maximum angular increment is rapidly built up after the connection and is thereafter gradually reduced. If the capacitive reactive element is disconnected from the AC …
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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
- Granted August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1998.
- 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.