Welding power supply arc starter

Details Welding power supply arc starter Welding power supply arc starter

B - Operations, Transporting

23

K

B23K 9/067 (2006.01) B23K 9/10 (2006.01)

Patent

CA 2208829

A method and apparatus for arc welding, particularly starting an arc is disclosed. A welding power source that provides a welding current to an electrode and a workpiece includes a source of welding current having an inductor. The inductor and current source are connected to a pair of outputs, such as the output studs, and form a welding current path including the source of current, the output inductor, the outputs and the electrode and workpiece. A source of a high frequency voltage, such as a high frequency coupling coil is included in the welding current path. An arc starting circuit provides a controllable current path for current flow in the inductor prior to the application of high frequency voltage. The arc starting current path is not the welding current path.

Méthode et appareil pour le soudage à l'arc, en particulier façon d'amorcer un arc. Une source d'énergie fournissant un courant de soudage à une électrode et à une pièce à travailler comprend une source de courant de soudage comportant une bobine d'inductance. La bobine d'inductance et la source de courant sont raccordées à une paire de sorties, telles les tiges de sortie, et forment un trajet de courant de soudage comprenant la source de courant, l'inductance de sortie, les sorties ainsi que l'électrode et la pièce à travailler. Une source à tension haute fréquence, telle une bobine de couplage haute fréquence, est incluse dans le trajet de courant de soudage. Un circuit d'amorçage d'arc fournit un trajet de courant contrôlable pour faire passer le courant dans l'inductance avant application de la tension haute fréquence. Le trajet du courant d'amorçage de l'arc n'est pas le trajet du courant de soudage.

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