The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2006
Filed:
Sep. 17, 2002
BO Bijlenga, Åmål, SE;
Peter Lundberg, Västerås, SE;
Tomas Jonsson, Västerås, SE;
Nicklas Johansson, Uppsala, SE;
Esie Ramezani, Möriken, CH;
Bo Bijlenga, Åmål, SE;
Peter Lundberg, Västerås, SE;
Tomas Jonsson, Västerås, SE;
Nicklas Johansson, Uppsala, SE;
Esie Ramezani, Möriken, CH;
ABB AB, Vasteras, SE;
Abstract
The invention relates to a converter provided with a resonant circuit (), which converter comprises a device () for measuring the derivative (dI/dt) of the current through the current valves) and a detection device () co-operating with said measuring device () for detecting a short-circuit in the converter, the detection device () being adapted to detect a short-circuit current when the current derivative (dI/dt) measured by the measuring device () is equal to or exceeds a stipulated current derivative limit value (dI/dt) during a length of time exceeding a stipulated time limit value (t). The invention also relates to a method for controlling such a converter.