Electric arc welder with a plurality of power supplies

Details Electric arc welder with a plurality of power supplies Electric arc welder with a plurality of power supplies

B - Operations, Transporting

23

K

B23K 9/10 (2006.01) B23K 9/095 (2006.01)

Patent

CA 2319933

An electric arc welder comprising a plurality of power supplies connected to a single welding station with a D.C. input for passing an arc welding current across an electrode and workpiece, each of the power supplies including a switching type inverter with an output D.C. current determined by a signal applied to the input of the power supply, a circuit connecting the output D.C. currents in parallel at the input of the welding station, a feedback circuit including a sensor for creating a current signal representing the arc current, a command signal source, and a circuit for creating a master current signal based upon the sensed current signal and the command signal, and a circuit for applying said master current signal to the input of the plurality of power supplies whereby the D.C. current to the D.C. input of the welding station is equally shared by the power supplies.

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