On the dynamics of cutting arc plasmas: the role of the power supply ripple
Main Article Content
Abstract
The power sources used in cutting arc torches are usually poorly stabilized and have a large ripple factor. The strong oscillatory components in the voltage and arc current produce in turn, large fluctuations in the plasma quantities. Experimental observations on the dynamics of the non-equilibrium plasma inside the nozzle of a 30 A oxygen cutting torch with a 7 % ripple level of its power source are reported in this work.
Downloads
Article Details
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
References
V. A. Nemchinsky and W. S. Severance, What we know and what we do not know about plasma arc cutting, J. Phys. D: Appl. Phys. 39: R423–438, 2006.
V. Rat and J. F. Coudert, Pressure and arc voltage coupling in dc plasma torches: Identification and extraction of oscillation modes, J. Appl. Phys. 108: 043304, 2010.
J. F. Coudert and V. Rat, Influence of configuration and operating conditions on the electric arc instabilities of a plasma spray torch: role of acoustic resonance, J. Phys. D: Appl. Phys. 41: 205208, 2008.
S. Ghorui and A. K. Das, Origin of fluctuations in atmospheric pressure arc plasma devices, Phys. Rev. E 69: 026408, 2004.
L. Prevosto, H. Kelly and B. Mancinelli, On the physical origin of the nozzle characteristic and its connection with the double-arcing phenomenon in a cutting torch, J. Appl. Phys. 105: 013309, 2009.
L. Prevosto, H. Kelly and B. Mancinelli, On the Use of Sweeping Langmuir Probes in Cutting Arc Plasmas – Part I: Experimental Results, IEEE Trans. Plasma Sci. 36: 263–270, 2008.
L. Prevosto, H. Kelly and F. O. Minotti, On the Use of Sweeping Langmuir Probes in Cutting Arc Plasmas – Part II: Interpretation of the Results, IEEE Trans. Plasma Sci. 36: 271–277, 2008.
Y. P. Raizer, Gas Discharge Physics, Berlin, Germany: Springer, 1991.
L. Prevosto, H. Kelly and B. Mancinelli, On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the "non-destructive" double-arcing phenomenon, J. Appl. Phys. 110: 083302, 2011.
L. Prevosto, H. Kelly and B. Mancinelli, On the space-charge boundary layer inside the nozzle of a cutting torch, J. Appl. Phys. 105: 123303, 2009.
M. C. M. van de Sanden, P. P. J. M. Schram. A. G. Peeters, J. A. M. van der Mullen, and G. M. W. Kroesen, Thermodynamic generalization of the Saha equation for a two-temperature plasma, Phys. Rev. A 40: 5273–5276,1989.
R. N. Franklin, You cannot patch active plasma and collisionless sheath, IEEE Trans. Plasma Sci. 30: 352–356, 2002.
T. E. Sheridan and J. Goree, Colisional plasma sheath model, Phys. Fluids B 3: 2796–2804, 1991.
S. Ghorui, J. V. R. Heberlein and E. Pfender, Non equilibrium modelling of an oxygen-plasma cutting torch, J. Phys. D: Appl. Phys. 40: 1966–1976, 2007.