Lincoln Global, Inc.

Robert Hasan

Russell Kenneth Myers

William S Houston

Timothy Mark O'Donnell

Timothy M O'donnell

Timothy M O'Donnell

Electric arc welder () performs a given weld process with selected current waveform performed between electrode () and workpiece (). Welder () includes a controller with a digital processor (), sensor () for reading instantaneous weld current, and circuit () to convert the instantaneous current into a digital representation of the level of instantaneous weld current. Digital processor () has program circuit () to periodically read and square the digital representation at a given rate, register () for summing a number N of square digital representations to give a summed value, and an algorithm () for periodically dividing the summed value by the number N to provide a quotient and then taking the square root of said quotient to thereby digitally construct rms signal () representing the root mean square of the weld current.

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Euclid, OH, United States of America

Robert Hasan