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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN En Línea: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v1.i2.50
pages 205-218

Electric fluctuations of DC and AC arcs in plasma torches

A. Kaminska
Institute of Electric Power Engineering - Poznan University of Technology ul.Piotrowo 3A - 60-965 Poznan - Poland
Michel A. Dudeck
ICARE Inst.-CNRS and University of Paris 6, 75252 Paris, France

SINOPSIS

Experimental investigations of the dynamic behaviour of a nitrogen arc in DC and AC plasma torch has been performed. We have observed that the dynamic behaviour due to the displacement of the anodic root of the AC arc is similar to that of the DC arc but occurs only for the half-wave of the alternating voltage for which the movement of anodic root is possible. The influence of pressure on the dynamic behaviour of the DC arc was studied and discussed. We have experimentally verified that the frequency of voltage fluctuations depended on the pressure by a power law with the adiabatic coefficient. The influence of different supply circuits on the fluctuations of the electric parameters of the arc was described.


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