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:
Dec. 25, 2012
Filed:
Jun. 26, 2007
Beno Klopcic, Ljubliana-Crnuce, SI;
Heinz-ullrich Mueller, Michelstadt, DE;
Drago Dolinar, Maribor, SI;
Gorazd Stumberger, Ptuj, SI;
Beno Klopcic, Ljubliana-Crnuce, SI;
Heinz-Ullrich Mueller, Michelstadt, DE;
Drago Dolinar, Maribor, SI;
Gorazd Stumberger, Ptuj, SI;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for operating a single-phase, mid-frequency welding transformer formed with a transformer core having a primary coil and a secondary coil connected into a secondary circuit has several steps. The several steps include regulating a magnetic flux density (B) in the transformer core between an upper flux density threshold value (Bm) and a lower flux density threshold value (−Bm), by applying, in alteration, a first voltage (U) and a second voltage (−U) to the primary coil of the transformer, and regulating a load current (i) in the secondary circuit between an upper load current threshold value (i) and a lower load current threshold value (i), by applying, in alternation, a third voltage (0V)to the primary coil of the transformer.