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Influence of arc currents and axial magnetic fields strength on high current vacuum arc

Published online by Cambridge University Press:  09 April 2008

L. Wang ,
S. Jia ,
L. Zhang ,
D. Yang  and
Z. Shi
L. Wang*
Affiliation:
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
S. Jia
Affiliation:
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
L. Zhang
Affiliation:
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
D. Yang
Affiliation:
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
Z. Shi
Affiliation:
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
*
[email protected]
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Abstract

Based on numerical simulation technology, the influence of arc currents and axial magnetic fields (AMFs) strength on high current vacuum arc (HCVA) characteristics is studied and analyzed. Simulation results show that electron temperature, ion number density, axial current density, plasma potential, plasma pressure and heat flux density to anode in HCVA are all increased with the increase of arc currents. For very high current vacuum arc, current constriction near cathode side can be more significant than that of anode side. The increase of AMF strength can decrease the above parameters, and will control HCVA more efficiently. The simulation results of HCVA under different arc currents are also verified by experiments.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 41 , Issue 3 , March 2008 , pp. 243 - 249
Copyright
© EDP Sciences, 2008

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