Plasma pilot arc control

Details Plasma pilot arc control Plasma pilot arc control

B - Operations, Transporting

23

K

B23K 9/073 (2006.01) B23K 10/00 (2006.01) H05H 1/36 (2006.01)

Patent

CA 2225942

A method and apparatus for controlling and maintaining a continuous flow of pilot arc current in a plasma cutting torch includes a pilot circuit, a current sensing circuit, and a control circuit. The control circuit maintains a continuous flow of pilot current through the pilot circuit both before and after a cutting arc has been generated. The control circuit further controls the magnitude of the pilot current in response to the sensing circuit indicating the absence or presence of the cutting arc.

Méthode et appareil permettant de commander et d'entretenir un flux continu de courant d'arc pilote dans un chalumeau de plasmacoupage. Comprend un circuit pilote, un circuit de détection de courant et un circuit de commande. Le circuit de commande entretient un flux continu de courant pilote dans le circuit pilote à la fois avant et après la production d'un arc de découpage. Le circuit de commande commande en outre la valeur du courant pilote en fonction de l'absence ou de la présence de l'arc de découpage, indiquée par le circuit de détection.

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