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:
Jan. 07, 1997
Filed:
Sep. 09, 1994
Per-Erik Bjorklund, Bjurs.ang.s, SE;
Asea Brown Boveri AB, Vaster.ang.s, SE;
Abstract
A device in a system for power transmission by means of high voltage direct current wherein: a first current path and a second current path are interconnected at a branch point; a first semiconductor connection is connected into the first current path only and which is controllable between conducting and non-conducting states and vice versa; a second semiconductor connection having a diode function and which is connected into the second current path only; a capacitor branch comprising a capacitor and connected between a first connection point on the first current path and a second connection point on the second current path; the first connection point and the branch point are located on opposite sides of the first semiconductor connection; the second connection point and the branch point are located on opposite sides of the second semiconductor connection; and control members for controlling, in dependence on the voltage across the capacitor, the first semiconductor connection between a non-conducting and a conducting state.