Coupling arrangement for a welding apparatus

Details Coupling arrangement for a welding apparatus Coupling arrangement for a welding apparatus

1979-12-05

1982-09-14

Shaw, C. C.

Electric heating

Metal heating

By arc

B23K 910

Patent

active

043497209

ABSTRACT:
Disclosed is a coupling arrangement of a DC welding apparatus, particularly intended for MIG welding. The coupling comprises a controllable fast DC voltage source, first circuit elements for detecting both load current and load voltage and for generating voltage signals corresponding thereto, second circuit elements for forming a control signal in response to said voltage signals so as to correspond to the values of desired current step and current increase rate in a drop short-circuit instance, and third circuit elements which receive the control signal and effect control of the voltage source in response thereto. Said second circuit elements may include means for receiving a setting signal by which the characteristic values of the current step and the current increase may be set and scaled and the open circuit-voltage of the voltage source can be determined.

REFERENCES:
patent: 3928746 (1975-12-01), Ericsson
patent: 3961154 (1976-06-01), Ericsson
patent: 4201906 (1980-05-01), Puschner

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