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Expired Canadian patentCanada

Current control system for high frequency link cycloconverter

CA 1060950 A · Owner: General Electric Company · Inventors: Espelage, Paul M.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In a system including an input cycloconverter which operates a high frequency resonant tank from a source of low frequency voltage applied through a reactor with or without, an output cycloconverter an input cycloconverter control, circuit independently controls real and reactive power or real power and input power factor. The in-phase and quadrature components of input line current as well as the tank voltage are controlled, and for the main application a simpler implementation has a limited range of phase angle settings close to 0° and to ?90°. The current control technique has the advantages of fast response and simplicity.

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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 21, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 21, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 21, 1979
Term endedAugust 21, 1996
Patent numberCA 1060950 A
Classification (IPC)H02M1/08 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 21, 1979Term endedAug 21, 1996

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.