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:
Feb. 01, 2005
Filed:
Jan. 19, 2001
Hubert Aigner, Taufkirchen/Trattnach, AT;
Hubert Aigner, Taufkirchen/Trattnach, AT;
Fronius International GmbH, Pettenbach, AT;
Abstract
The invention describes a method of controlling a welding current source () having a resonant circuit (), whereby a bridge circuit () is controlled by a control system (). A consumer, in particular a welding process, is supplied with energy via the bridge circuit () from a power source (). In order to control the individual switching elements () of the bridge circuit (), fixed pre-set control states Sto Sare stored and, during normal operation, the bridge circuit () is controlled on the basis of the control states Sto Sone after the other. If a change in resistance occurs at the consumer, the control system () switches to a special operating mode at the resonance frequency of the resonant circuit () and the bridge circuit () is controlled on the basis of the stored control states in order to run the special operating mode.