Electric heating – Metal heating – By arc
Reexamination Certificate
2006-06-20
2006-06-20
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
By arc
C219S130210
Reexamination Certificate
active
07064290
ABSTRACT:
An operating system is provided for an electric arc welder including a high switching speed inverter power source for creating an arc voltage and arc current between an electrode and a workpiece. This operating system regulating the arc voltage to provide a voltage with a slope by using an error circuit to create an error output and having a first input with a signal representing the set voltage and a second input representing the sum of the actual arc voltage and the actual arc current multiplied by a slope constant. A DSP program reduces the error output by adjusting the voltage output of the inverter power source to change the actual arc voltage. The slope constant is in the range of 0–10%.
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Blankenship George D.
Myers Russell K.
O'Donnell Timothy M.
Fay Sharpe Fagan Minnich & McKee LLP
Lincoln Global Inc.
Shaw Clifford C.
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