A method and a device for detecting and handling short-circuit phenomena for power semiconductor devices of turn-off type connected in series
CA 2219368 C · Owner: Lundberg, Peter · Inventors: Bijlenga, Bo; Lundberg, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for detecting and handling a short circuit in a circuit having a plurality of power semiconductors connected in series. The method comprising the steps of dividing the voltage across the electrodes of each power semiconductor and measuring the magnitude of a small proportion of the voltage. The magnitude of the voltage is compared to a reference voltage at least from when the power semiconductor is turned on. The reference voltage is higher than the maximum voltage across the power semiconductor during normal operation. A short circuit is detected when the magnitude of the measured voltage exceeds the reference voltage.
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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 November 13, 1997 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.