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:
Apr. 25, 2023
Filed:
Nov. 06, 2018
Fronius International Gmbh, Pettenbach, AT;
Franz Peter Musil, Pettenbach, AT;
Andreas Prinz, Pettenbach, AT;
Fronius International GmbH, Pettenbach, AT;
Abstract
The invention relates to a method for contactless ignition an arc (L) between an electrode () and a workpiece () which is to be welded, for carrying out a welding process, wherein a welding current (I) and a welding voltage (U) are provided at an output () of a welding current source (), wherein the welding current source () contains a resonance converter () for generating a periodically varying, preferably substantially sawtooth-shaped, open circuit welding voltage (U) with voltage maxima (U) which recur periodically with a repetition rate (f) and a welding current source () for carrying out the igniting process. In order to achieve reliable contactless ignition of the arc (L) without complicated circuitry, the resonance converter () is formed by a series-parallel resonant converter, and temporally synchronous high-frequency pulses (U) are superimposed on the open circuit welding voltage (U) in the region of at least some of the periodically recurring voltage maxima (U) of the open circuit welding voltage (U).