Utilization of a thermal model to predict electrode erosion parameters of engineering importance

Donaldson, A. L.; Kristiansen, M.

doi:10.1109/modsym.1990.201003

Cited by 12 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to their observations, the electrode erosion rate exhibits a similar trend as function of pulse parameters [24], as predicted by their scaling law. There exist three different regions [22,24]: (1) when the typical parameter is below a certain threshold, the erosion is dominated by the vaporization and increases linearly (in the logarithmic coordinates) with the parameter; (2) when the parameter is above a certain value, the erosion is dominated by the ablation and has the same dependence on the parameter as in region (1), but with one order higher magnitude; (3) there is a narrow transient area between (1) and (2); in this region the erosion increases fast from the first regime to the second regime. From their findings, one can see that the erosion rate will decrease when the parameter decreases, no matter which regime is considered.…”

Section: Discussionsupporting

confidence: 61%

See 1 more Smart Citation

An Efficient, Repetitive Nanosecond Pulsed Power Generator with Ten Synchronized Spark Gap Switches

Liu

Pemen

Hoppe

et al. 2009

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 61%

“…Donaldson et al conducted comprehensive investigations on the electrode erosion [22,[24][25]. They developed a law using a thermal model to scale the electrode erosion rate (i.e.…”

Section: Discussionmentioning

confidence: 99%

An Efficient, Repetitive Nanosecond Pulsed Power Generator with Ten Synchronized Spark Gap Switches

Liu

Pemen

Hoppe

et al. 2009

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

“…For degradation of the electrodes discharged in gas, the mechanisms include arc joule heating, electrode joule heating, chemical reaction heating, atomic particle interaction, bulk evaporation, etc. [21]. It should be noted that the electrolytic dissolution of electrode metal, especially surface oxides of the metal, is the significant form of erosion of the pulsed discharge in water [22].…”

Section: Introductionmentioning

confidence: 99%

Comparison and Evaluation of Electrode Erosion Under High-Pulsed Current Discharges in Air and Water Mediums

Liu

Luo

et al. 2016

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

In order to analyze the electrode erosion rate and erosion mechanism under high-pulsed current discharge in water and air, the erosion characteristics of the tungsten-copper (W-Cu) electrode under high-pulsed current were comparatively studied in the experiments. Based on the weight loss measurement, the cathode erosion rate, the anode erosion rate, and the total erosion rate of the electrodes discharged in water and air are obtained. Then the eroded surfaces after 100 shots are analyzed by electron transfer dissociation and energy dispersive X-ray spectroscopy, and concentrations of the metal ions after discharge in the water are measured and analyzed. Results show that the erosion of W-Cu electrode in water is more serious than that in air. Macromorphology of the eroded electrodes in water indicates that there are obvious arc spots caused by more focused arc and higher current density, leading to more serious erosion. Micromorphology shows that the electrode erosion in water is mainly caused by the evaporation of the metal, while the jet of the molten metal in air is the major erosion form. Apart from physical erosion caused by metal ablation and evaporation, the complex electrochemistry reaction, which is induced by the high-temperature arc in water, is one of the significant causes resulting in more serious erosion in water.Index Terms-Electrode erosion, erosion rate, morphology analysis, pulse current, transferred charge. 0093-3813

show abstract

“…Typically, the erosion rate (erosion volume per shot) of electrodes is approximately proportional to the square of the switching current [6,7]. Within the tenswitch setup, the total switching current is shared by the ten switches, and the current is reduced by a factor of 10 in each of them.…”

Section: Efficient High-power Pulsed Power Generationmentioning

confidence: 99%

A Linear Transformer Driver (LTD) with multiple self triggered switches

Liu

Pemen

Heesch

et al. 2011

2011 IEEE Pulsed Power Conference

View full text Add to dashboard Cite

Multiple switches are normally required for the generation of very high pulse power levels. The critical problem related to multiple switches is how to synchronize them in a short time interval and how to obtain current/voltage balance. A multiple-switch technique based on a TLT (Transmission-LineTransformer) can solve this problem. It provides a failurefree solution to synchronize multiple switches automatically like in a Marx generator. In contrast to the Marx generator, it can produce pulses with various voltage and current gains and with a high degree of freedom in choosing output impedances. This technology has been investigated systematically.The feasibility of the technology has been demonstrated with a ten-switch (spark gaps) prototype. Pulses with a rise-time of 10 ns, a pulse width of 55 ns, a peak output power of 300-810 MW, a peak output voltage of 40-77 kV, and a peak output current of 6-11 kA have been achieved at a repetition rate of 300 pps and with an energy efficiency of over 93%. Also solid-state switches can be applied in this topology, e.g. proper operation of multiple thyristors has been verified for current multiplication. Moreover, the application of this topology for other circuits, such as Blumlein, Inductive-VoltageAdder, Linear-Transformer-Driver, was explored.

show abstract

Utilization of a thermal model to predict electrode erosion parameters of engineering importance

Cited by 12 publications

References 6 publications

An Efficient, Repetitive Nanosecond Pulsed Power Generator with Ten Synchronized Spark Gap Switches

An Efficient, Repetitive Nanosecond Pulsed Power Generator with Ten Synchronized Spark Gap Switches

Comparison and Evaluation of Electrode Erosion Under High-Pulsed Current Discharges in Air and Water Mediums

A Linear Transformer Driver (LTD) with multiple self triggered switches

Contact Info

Product

Resources

About