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:
May. 24, 2005
Filed:
Apr. 10, 2002
BO Bijlenga, Åmål, SE;
Gunnar Asplund, Ludvika, SE;
Peter Lundberg, Västerås, SE;
Tomas Jonsson, Västerås, SE;
Niklas Johansson, Västerås, SE;
Staffan Norrga, Västerås, SE;
Bo Bijlenga, Åmål, SE;
Gunnar Asplund, Ludvika, SE;
Peter Lundberg, Västerås, SE;
Tomas Jonsson, Västerås, SE;
Niklas Johansson, Västerås, SE;
Staffan Norrga, Västerås, SE;
ABB AB, Västerås, SE;
Abstract
The invention relates to a VSC-converter for converting direct voltage into auxiliary voltage and vice versa, which comprises a series connection of at least two current valves () arranged between two poles (), a positive and a negative, of a direct voltage side of the converter, each current valve comprising several series connected circuits (), each of which circuits comprising a semiconductor component () of turn-off type and a rectifying component () connected in anti-parallel therewith, an alternating voltage phase line () being connected to a midpoint (), denominated phase output, of the series connection of current valves () between two of said current valves while dividing the series connection into two equal parts. Each of the series connected circuits () of the respective current valve comprises, in order to make possible a good voltage distribution between the semiconductor components () of turn-off type included in the respective current valve, a snubber capacitor () connected in parallel with the semiconductor component () of turn-off type included in the circuit. The converter () further comprises a resonance circuit () for recharging the snubber capacitors () of the current valves.