D.C. arc welder with solid state components

Details D.C. arc welder with solid state components D.C. arc welder with solid state components

1975-10-21

1977-09-13

Truhe, J. V.

Electric heating

Metal heating

By arc

219131WR, B23K 910

Patent

active

040484688

ABSTRACT:
A D.C. arc welder with solid state components which is provided with means for converting A.C. to D.C. and with controlled diodes serially connected in the D.C. line between the converting bridge and a transformer providing electric insulation between the D.C. line and the terminals of a welding head. A further controlled diode is also connected to the D.C. line downstream of the control diodes and in parallel with the transformer and in series with a capacitor. Between the transformer and the welding head a rectifying assembly is arranged. The serially connected controlled diodes are simultaneously triggered by a pulse amplifier and transformer. A further pulse amplifier and a further pulse transformer subsequently trigger the further controlled diode, whereby the serially connected controlled diodes are turned off. The pulse amplifiers and transformers are alternately driven by a square wave generating assembly whose period depends on a magnitude proportional to the voltage and current levels at the terminals of the welding head.

REFERENCES:
patent: 3528100 (1970-09-01), Budy
patent: 3728516 (1973-04-01), Daspit
patent: 3775662 (1973-11-01), Compoly et al.
patent: 3894210 (1975-07-01), Smith et al.
patent: 3904846 (1975-09-01), Risberg
O. N. Bratkova et al., "A High Frequency Welding Current Source with the Penetrating Power of the Arc Automatically Regulated", Avt. Svarka, vol. 24, No. 6, June 1971, pp. 56-58.

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