Model of a Diffuse Column Vacuum Arc With Cathode Jets Burning in Parallel With a High-Current Plasma Column

Keidar, Michael; Schulman, M.B.; Taylor, E.

doi:10.1109/tps.2004.828535

Cited by 47 publications

(24 citation statements)

References 26 publications

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“…ON ARC VOLTAGE CRITERIA Previously [5] the condition for stable single jet existence assumed a negligibly small self-magnetic field, and therefore considered only the effect of an axial magnetic field. In this paper, we consider a total magnetic field, which is a combination of an axial magnetic field and a self-magnetic field as shown self-consistent voltage along the plasma jet (not including the cathode potential drop) as function of the contact gap, with a magnetic field strength as a parameter.…”

Section: Model For Transition To Diffuse Arc Basedmentioning

confidence: 99%

“…The peripheral region consists of individual cathodic jets (-50-100 A current in each [4]) moving over the cathode surface. In order to understand this phenomenon, the model predicting the stability conditions for a single cathode spot jet burning to the side of a high-current plasma column was developed [5,6]. This model is based on the fact that the arc voltage is set by the high-current column, which has higher voltage drop in comparison to 100 A vacuum arc [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…It was shown that the additional voltage applied by the main column affects the plasma expansion and current flow in the displaced single jet [5]. The current density in the single cathodic jet increases near the anode because ofthe extra voltage imposed by the main column.…”

Section: Introductionmentioning

confidence: 99%

“…It was shown that considering IC, as an arc mode transition criterion can explain experimentally observed transitions in the arc mode as a function of gap and current over a wide range ofapplied axial magnetic fields (AMF) [5]. For practical purposes, a criterion based on the arc voltage has the advantage ofbeing independent of the details ofthe high-current column behavior.…”

Section: Introductionmentioning

confidence: 99%

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Model for the Transition to the Diffuse Column Vacuum Arc Based on an Arc Voltage Criteria

Keidar

Taylor

2006

2006 International Symposium on Discharges and Electrical Insulation in Vacuum

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The high-current diffuse column arc in vacuum consists of a bright central column of plasma, with some number of individual cathode spots burning on the remainder of the contact surface. The arc voltage imposed by the main column alters the plasma expansion and current flow of single jets burning alongside the column. Stable existence of the displaced single jets drives the transition into the high-current diffuse mode. The new model assumes that the displaced single jets are confined along the magnetic field, which is combination of a self-magnetic field and an axial magnetic field. The addition of the azimuthal self-magnetic field to the model increases the effective length of the jet path between two contacts. The longer effective length increases the critical voltage below which singles jets can stably exist without a source of additional plasma. This produces conditions favorable to single jet stability. A generalized criterion for single jet existence is presented.

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Section: Model For Transition To Diffuse Arc Basedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Model for the Transition to the Diffuse Column Vacuum Arc Based on an Arc Voltage Criteria

Keidar

Taylor

2006

2006 International Symposium on Discharges and Electrical Insulation in Vacuum

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“…About vacuum arc simulation, there are many simulation works, the typical works have been done by Keidar and co-workers, 9,10 Schade and co-workers, 11,12 and Wang et al 13,14 In Refs. 9 and 10, the diffuse arc and diffuse column arc under AMF are modeled and simulated.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of high-current vacuum arc characteristics under combined action of axial magnetic field and external magnetic field from bus bar

et al. 2009

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In this paper, the two-dimensional high-current vacuum arc (HCVA) model under the combined action of axial magnetic field (AMF) and external magnetic field from bus bar (EMFBB) is established. Based on this model, the influence of AMF and EMFBB on HCVA characteristics can be simulated and analyzed. Simulation results show that the HCVA column will be deflected by the Lorentz force generated by EMFBB and higher arc current. Moreover, the deflection level will be increased with the increase in external EMFBB strength. For HCVA, due to the smaller axial velocity near cathode side, the deflection of plasma parameters (such as ion number density, ion temperature, electron temperature, plasma pressure, and so on) near cathode side is more significant than that near anode side. The current deflection near cathode side toward direction of Lorentz force is more significant than that near anode side.

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Research on Magnetic Field Distribution between Electrodes in Vacuum Interrupter

Zhao

Wang

et al. 2020

IEEJ Transactions Elec Engng

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Vacuum circuit breaker is a kind of power equipment widely used in the power system. It is developing toward the direction of high voltage and high current. How to design the contact to maximize the interrupting capacity of the contact system has been conducted by scholars. In this paper, the magnetic field simulation model of contact system is established, the magnetic field distribution characteristics of vacuum interrupters are studied, and the distribution characteristics of the magnetic field in the half cycle of the cup-shaped axial magnetic field contact system are simulated and analyzed. On this basis, by changing the contact structure parameters, the effects of the number of slots in the cup, the slot angle, the center hole of the contacts, and the length of the slots on the distribution of the axial magnetic field were obtained. The results show that grooving the contact can reduce the eddy current, but it has a limited effect on reducing residual magnetic field. The increase of slot angle of contact cup can effectively reduce the residual axial magnetic field at the zero current moment and the axial magnetic field intensity at the peak current moment. Based on the above research results, a new embedded axial magnetic contact system with 12 slots embedded magnetic ring and reverse contact cup is designed. The embedded magnetic ring and reverse spiral slot increase the axial magnetic field at the peak current moment and reduce the residual axial magnetic field at the zero current moment. Finally, the characteristics of the magnetic field have been improved significantly compared with the magnetic field of traditional cup-shaped axial magnetic field contact.

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Model of a Diffuse Column Vacuum Arc With Cathode Jets Burning in Parallel With a High-Current Plasma Column

Cited by 47 publications

References 26 publications

Model for the Transition to the Diffuse Column Vacuum Arc Based on an Arc Voltage Criteria

Model for the Transition to the Diffuse Column Vacuum Arc Based on an Arc Voltage Criteria

Numerical simulation of high-current vacuum arc characteristics under combined action of axial magnetic field and external magnetic field from bus bar

Research on Magnetic Field Distribution between Electrodes in Vacuum Interrupter

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