Constant current welding power control system and method

Details Constant current welding power control system and method Constant current welding power control system and method

2006-08-28

2010-12-28

Hoang, Tu B (Department: 3742)

Electric heating

Metal heating

By arc

C219S130400, C219S130100, C219S1370PS

Reexamination Certificate

active

07858903

ABSTRACT:
A technique is disclosed for controlling a constant current regime, such as for stick welding. The regime includes a dig segment or regime in which current is increased as voltage decreases. The dig regime is initiated at a voltage that can be set by an operator. The constant current regime also includes two distinct constant current segments separated by a transition segment. The transition segment occurs at a predetermined voltage, permitting rapid and predictable operation as an arc is lengthened during welding. The constant current segments may be suitable for different types of electrode. The dig selection also permits customizing the regime for soft or stiff digs that are initiated at different voltages (or arc lengths) suitable for different electrode types.

REFERENCES:
patent: 3904846 (1975-09-01), Risberg
patent: 6040555 (2000-03-01), Tiller et al.

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