Dynamic characteristics of variable frequency pulsed TIG arc
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The dynamic characteristics of TIG arc supplied by pulsed current have been studied. Square and triangle waveforms of current pulsation have been applied over the range of frequency from 0.05Hz up to 5,000Hz. In order to define the influence of the kind of anode on relaxation phenomena of arc both stainless steel molten anode and water-cooled copper anode have been used. The outcomes of the reported experimental studies allow conclusions to be drawn about the influence of pulsed current frequency, kind of the anode and current waveform on dynamic behaviour of the TIG arc. On the basis of high frequency current and voltage waveforms a mechanism of relaxation process of arc in the vicinity of anode has been suggested.
- Transactions of JWRI
Transactions of JWRI, 173-177, 1986