Arrangement in electrical welding apparatus

Details Arrangement in electrical welding apparatus Arrangement in electrical welding apparatus

1977-04-26

1978-09-26

Truhe, J. V.

Electric heating

Metal heating

By arc

21913021, B23K 910

Patent

active

041173031

ABSTRACT:
An a.c. operated arc welding apparatus comprises a controlled frequency converter which substantially increases the frequency of the alternating current and the output of which is connected to the welding electrodes via a transformer and a rectifier. The connection between the rectifier and the welding electrodes includes a shunt capacitance having an impedance low enough to attenuate the alternating current components of the welding current to a level acceptable from the acoustic aspect, the said connection further comprising means for preventing the capacitor from adversely affecting the rectifier and frequency converter and also comprising a choke arranged between the capacitor and the electrodes to prevent the capacitor from adversely affecting the welding properties.

REFERENCES:
patent: 3308265 (1967-03-01), Hobart
patent: 3316318 (1967-04-01), Gibson
patent: 3728516 (1973-04-01), Daspit

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