Short circuit arc welder and method of controlling same

Details Short circuit arc welder and method of controlling same Short circuit arc welder and method of controlling same

B - Operations, Transporting

23

K

B23K 9/09 (2006.01) B23K 9/095 (2006.01) B23K 9/10 (2006.01)

Patent

CA 2479694

An electric arc welder operated to perform a short circuit welding process between an electrode and a workpiece, where the process comprises a succession of alternate short circuit conditions and arc conditions, with a first current waveform during the short circuit condition and a second voltage waveform during the arc condition. A first waveform generator constructs the first waveform from a series of current pulses controlled by a pulse wave modulator operated at a rate greater than 18 kHz and a second waveform generator constructs the second waveform from a series of current pulses controlled by a pulse wave modulator operated at a rate greater than 18 kHz. The second waveform generator has a circuit to generate the second waveform with a generally constant arc parameter, generally voltage.

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