2020 №09 (07) DOI of Article
2020 №09 (01)

The Paton Welding Journal 2020 #09
TPWJ, 2020, #9, 43-48 pages

Processes occurring at excitation of the welding arc (Review)

N.M. Makhlin
SC «REC Welding and Control in Nuclear Power of the E.O. Paton Electric Welding Institute» 11 Kazymyr malevych Str., 03150, Kyiv, Ukraine. E-mail: electro@paton.kiev.ua

In view of the fact that a complete theory of the process of welding arc excitation, which could provide a convincing explanation of the entire totality of the known facts is absent so far, some important theoretical and experimental data of different authors are considered as regards the processes of initial excitation of the welding arc in arc and plasma welding which is important for designing electronic boosting devices, generating pulses of high and higher voltage that are injected into the interelectrode gap to ensure contactless initial and repeated excitations of the welding arc. Requirements to pulse parameters that are generated by these devices are given, which are obtained on the base of many investigations (including theoretical studies), experience in designing and application of boosting devices. Analytical expressions are proposed to create the theory of the process of dC welding arc excitation. 15 Ref. Keywords: welding arc excitation in arc and plasma welding, glowing, spark and arc discharges, initial ignition voltage, repeated excitations of AC arc, combined devices - exciters-stabilizers, energy, amplitude, pulse duration

Received 10.08.2020


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