Welding wire feeder system for electric arc welding apparatus

Details Welding wire feeder system for electric arc welding apparatus Welding wire feeder system for electric arc welding apparatus

1984-08-24

1986-04-22

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219136, B23K 912

Patent

active

045844585

ABSTRACT:
A welding wire feeder system for an electric arc welder in which the wire feed motor M is powered from a pulse width modulated power supply comprising a power transistor Q10 controlled by a pulse signal on line 31 from a pulse width modulator comprising an integrated circuit A3. A control voltage proportional to the arc voltage and a feedback voltage indicative of the feed motor speed are generated and applied to respective inputs of a high gain amplifier A4-1 whose output error signal is either high or low dependent upon the relative values of the control and feedback signals. Control is effected in such a manner that an increase in welding arc voltage causes a corresponding increase in the welding wire feed rate, and vice versa.

REFERENCES:
patent: 4247751 (1981-01-01), Ashton et al.
patent: 4301355 (1981-11-01), Kimbrough et al.

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