Extraction of arc length from voltage and current feedback

摘要

A method of controlling a welding system includes controlling a weld current supplied to an electrode at a current ramp rate and determining an arc length based at least in part on the controlled weld current and a changing arc voltage. The arc length includes a distance between the electrode and a workpiece, and the arc voltage includes a voltage between the electrode and the workpiece.

主权项

1. Method of controlling a welding system comprising:
controlling, via control circuitry of the welding system, a weld current supplied to an electrode at a current ramp rate over a time segment; and determining, via the control circuitry, an arc length based at least in part on the controlled weld current and a changing arc voltage during the time segment, wherein the arc length comprises a distance between the electrode and a workpiece, the changing arc voltage comprises a voltage between the electrode and the workpiece, and the arc length is determined without altering the weld current for measurement purposes.