NDLI: Arc switch modeling with complex-impedance loads

Content Provider	IEEE Xplore Digital Library
Author	Buchenauer, C.J.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., New Mexico Univ., Albuquerque, NM, USA (Buchenauer, C.J.)
Abstract	Summary form only given. An arc switch driving a real-impedance load produces an asymmetric voltage waveform with a long dissipative tail as the plasma arc heats and expands. A two-step process is suggested by some measurements. Shunt capacitors have been added to spark switches to hasten arc heating and expansion. Improvements in waveform symmetry and closure properties are possible with more complex networks as well. The design of such networks will require a detailed understanding of switch behavior. Switching performance is analyzed with pSPICE models of the arc switches and the networks. Switch behavior is modeled after the equation (d/R)/sup m/=k /spl int//sub 0//sup t/ I/sup n/ dt, where R is the time-dependent arc switch resistance, I is the arc switch current, d is the arc length, and k is a constant for the particular switch medium. Several switch models are investigated, including those of Braginskii (m=1, n=2/3), Rompe and Weitzel (m=2, n=2), and Vlastos (m=5/3, n=2). Shunt capacitors, shunt stub transmission lines, and more complex networks are employed to improve switching performance. Waveform symmetry, late-time flatness, and rise time can be improved significantly. Modest increases in dV/dt are observed for some models. The relevance of this analysis depends critically upon the accuracy of arc switch models. To improve the accuracy of models, experiments are planned that measures the dynamic impedances of arc switches during closure.
Sponsorship	Plasma Sci. and Applications Committee of the IEEE Nuclear and Plasma Sci. Soc
File Size	42703
File Format	PDF
ISBN	0780383346
ISSN	07309244
DOI	10.1109/PLASMA.2004.1339681
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Load modeling Plasma measurements Complex networks Voltage Probability distribution Plasma properties Plasma waves Capacitors Sparks
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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