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. 28, 2012
Filed:
Sep. 14, 2009
Rolf Karlsson, Laxå, SE;
Per Andersson, Fagersanna, SE;
Dan Wessman, Tived, SE;
ESAB AB, Gothenburg, SE;
Abstract
An inverter provides alternating current (iout) to a load () containing a welding circuit. The inverter includes at least one commutation circuit () and a bridge circuit () connected to a bus forwarding power from a DC power source (). The bus is also galvanically connected to the load () via the bridge circuit (). The at least one commutation circuit () receives power from the DC power source (); receives energy from inductive elements in the load () during a storage phase of a cyclic procedure, and controls energy feedback to the load () during a feedback phase of the cyclic procedure. The at least one commutation circuit () is a two-pole having a first pole (p) connected to a first node (A) and a second pole (p) connected to a second node (B). The at least one commutation circuit () is arranged to receive energy from the load () and feedback energy to the load () via the first and second nodes (A; B), either directly or via the bridge circuit (). Energy-flow control means (D, S) in each of the at least one commutation circuit () control energy to be stored in and taken out from a recovery capacitor (CR) in the commutation circuit () in question. The bridge circuit () delivers the alternating current (iout) to the load ().