WELDING TRANSFORMER Russian patent published in 1997 - IPC

FIELD: electrical engineering; electric welding. SUBSTANCE: welding transformer has magnetic core whose legs mount primary and secondary windings and one of them or two yokes carry additional disk-type control windings mounted so that they are free to turn about ends of main windings, embrace yokes throughout entire length, and their turns are set in parallel to longitudinal axes of yokes and are hinge-joined to core at ends of yokes. EFFECT: facilitated coarse and fine control of welding current, improved mass and size characteristics, reduced cost of welding transformer. 3 cl, 1 dwg