Arc initiation in plasma installations

Кузнецов, В. Е.; Сафронов, А. А.; Shiryaev, V. N.; Dudnik, Yu. D.; Vasilieva, O. B.; Pavlovs, A. V.

doi:10.1088/1742-6596/1147/1/012126

Cited by 1 publication

(1 citation statement)

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“…The plasma torch power supply system is decisive for the stabilization of the arc current [11] when the reference points of the electric arc move, however, it is not always capable of ensuring the static and dynamic stability of the plasma torch arc. An auxiliary electrode as the pulse injector for arc ignition is used to form the pilot arc in some cases [12][13][14][15]. The accompanied instabilities could significantly influence on the hollow electrode erosion resistance and therefore on the plasma torch operation.…”

Section: Introductionmentioning

confidence: 99%

Electro-erosion resistance of different electrodes materials for plasma generators

Murashov¹,

Obraztsov²,

Kurakina³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

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The experimental results of the hollow electrodes erosion resistance considering a pilot arc re-ignition during plasma torches operating, are presented in the paper. A high voltage alternating current oscillator is used to simulate an initial process instability. The electrical circuit of the experimental setup with a pulsed discharge current up to 2 kA with time parameter 8/250 and a follow current of 800 A at industrial frequency is described. Four electrodes materials of tungsten (W), iron (Fe), copper (Cu), copper with a sprayed nickel+iron powder (Cu-Ni-Fe) are investigated. X-ray patterns of the different electrode surfaces are demonstrated after 4–9 pulses and one pulse with follow current impacts. The electric charge is calculated by integrating the obtained discharge current to assess the erosion coefficient. The following decreasing order of the electrical erosion resistance is determined: W - Fe - Cu-Ni-Fe - Cu.

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Section: Introductionmentioning

confidence: 99%