Engine driven ARC welder

Details Engine driven ARC welder Engine driven ARC welder

1997-02-11

1998-01-13

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913021, B23K 910

Patent

active

057082545

ABSTRACT:
There is provided an engine driven arc welder adapted for converting a.c. output of welding generator into d.c. output to allow it to undergo switching control by using a switching circuit to detect an output of the switching circuit to control its ON/OFF period by the detected content to control a welding current. The engine driven arc welder has a load limiting function. In this case, AVR is employed in a feedback control loop for generator voltage. The circuit configuration includes a F/V characteristic circuit and an output suppression circuit for comparing a detected voltage of the welding generator with a predetermined reference voltage to deliver, when the detected voltage is lower than the reference voltage, a signal for suppressing a welding output to a constant current control circuit for controlling welding current so that it becomes equal to a fixed value.

REFERENCES:
patent: 2458658 (1949-01-01), Tyrner
patent: 4952774 (1990-08-01), Sugimoto et al.
patent: 5093611 (1992-03-01), Nakamura et al.
patent: 5250786 (1993-10-01), Kikuchi et al.

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