Electric arc welding system

Details Electric arc welding system Electric arc welding system

2005-02-15

2005-02-15

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

By arc

C219S132000

Reexamination Certificate

active

06855912

ABSTRACT:
An electric arc welding system for creating an AC welding arc between an electrode and a workpiece wherein the system comprises a first controller for a first power supply to cause the first power supply to create an AC current between the electrode and workpiece by generating a switch signal or command with polarity reversing switching points in the first controller, with the first controller operated at first welding parameters in response to first power supply specific parameter signals to the first controller. The system has at least one slave controller for operating a slave power supply to create an AC current between the electrode and workpiece by reversing polarity of the AC current at switching points where the slave controller is operated at second welding parameters in response to second power supply specific parameter signals to the slave controller. An information network connected to the first controller and the slave controller and containing digital first and second power supply specific parameter signals for the first controller and the slave controller and a digital interface connects the first controller with the slave controller to control the switching points of said second power supply by the switch signal or command from the first controller.

REFERENCES:
patent: 3458797 (1969-07-01), Larsen
patent: 4503316 (1985-03-01), Murase et al.
patent: 6111216 (2000-08-01), Stava
patent: 6207929 (2001-03-01), Stava et al.
patent: 6291798 (2001-09-01), Stava
patent: 6466469 (2002-10-01), Caruthers et al.
patent: 6472634 (2002-10-01), Houston et al.
patent: 6660966 (2003-12-01), Houston et al.
U.S. application Ser. No. 09/406,406; filed Sep. 27, 1999; entitledElectric Arc Welder with a Plurality of Power Supplies; Inventor—Elliot K. Stava; Docket No. LEEE212467.

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