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:
Aug. 12, 2008
Filed:
Jun. 19, 2002
Staffan Norrga, Stockholm, SE;
BO Bijlenga, Amal, SE;
Staffan Norrga, Stockholm, SE;
Bo Bijlenga, Amal, SE;
ABB AB, Västerås, SE;
Abstract
The invention relates to a converter provided with a resonant circuit (), which comprises a control device () adapted, in connection with a commutation of the phase current (i) from a semiconductor element of turn-off type of a first current valve () to a rectifying member of a second current valve () to effectuate a turn-on of the auxiliary valve () of the resonant circuit with a varaible time delay (t) after the turn-off of the first current valve, the converter comprising a member () for determining said time delay in dependence on the magnitude and the direction of the phase current (i) and the magnitude and the direction of a determined unbalance so that the unbalance is corrected at least partly when the control device applies the time delay (t). The invention also relates to a method for controlling such a converter.