Arc welding power source

Details Arc welding power source Arc welding power source

1981-10-15

1983-08-09

Shaw, C. C.

Electric heating

Metal heating

By arc

B23K 910

Patent

active

043980805

ABSTRACT:
A welding rectifier is connected to an a.c. power supply. The rectifier delivers a pulsating voltage which during a part of a period is too low to maintain the arc established between a welding electrode and a work. A main winding of an ironcored inductor is connected in series with the rectifier, the welding electrode and the work. An auxiliary winding is wound onto the iron core and connected in series with a capacitor. The auxiliary winding is connected to the main winding so that the two windings, when passed by a current, supply ampere-turns in the same direction. The auxiliary winding and the capacitor are connected in parallel with the main winding and the arc. The capacitor is also connected in series with a charging rectifier connected to the a.c. supply. The capacitor is discharged through the auxiliary winding and the main winding into the arc, when the voltage delivered by the welding rectifier is too low to maintain the arc.

REFERENCES:
patent: 3308265 (1967-03-01), Hobart
patent: 3911243 (1975-10-01), Moriyama et al.

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