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Expired Canadian patentCanada

Reactive power processing circuit for a current source gto inverter

CA 1286716 C · Owner: Matsuse, Koki · Inventors: Kubota, Hisao; Matsuse, Koki

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

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Abstract From the Canadian patent

A reactive power processing circuit for a current source GTO inverter in which a reactive current generated from a load of the GTO inverter is rectified by means of a fly wheel circuit and is sent to a capacitor so as to store a commutation surge voltage generated whenever a commutation of the inverter occurs, an excessive charge voltage across the capacitor is regenerated to a direct current output side of a power rectifier and a pair of, GTO (Gate Turn Off Thyristors) thyristors are connected between the capacitor and the direct current output side of the power rectifier in their forward directions so as to carry out a discharge operation for the excessive charge voltage across 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

  • Granted July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 26, 1987
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286716 C
Classification (IPC)H02M5/45 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJan 26, 1987Patent grantedJuly 23, 1991Term endedJuly 23, 2008

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