Characteristics of DC vacuum arc in the transverse axially symmetric magnetic field

Alferov, D. F.; Иванов, В. П.; Sidorov, V. A.

doi:10.1109/isdeiv.2002.1027341

Cited by 5 publications

(8 citation statements)

References 6 publications

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“…They proposed the vacuum arc became unstable when the plasma height was Corresponding waveform [23] less than the gap length. Alferov et al [17][18][19]29] investigated the effect of an axisymmetric TMF on the DC vacuum arc. They held the arc became unstable when the arc current less than a critical arc current.…”

Section: Physical Process In the Interruptionmentioning

confidence: 99%

“…Alferov et al. [17–19]studied the current interruption process in the presence of the axisymmetric TMF. Hanashiro et al.…”

Section: Introductionmentioning

confidence: 99%

“…Klajn [16] experimentally investigated the relationship between the magnetic field and the arc voltage. Alferov et al [17][18][19]studied the current interruption process in the presence of the axisymmetric TMF. Hanashiro et al [20] successfully interrupted DC 400 V/200 A by using the vacuum chamber under TMF.…”

Section: Introductionmentioning

confidence: 99%

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Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Liu

Chen

et al. 2021

IET Generation Trans & Dist

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The objective of this work intends to propose a novel current interruption technology in vacuum for LVDC power systems, based on the instability of vacuum arc under composite transverse magnetic fields (TMFs). The interruption characteristics were experimentally determined in an overdamping C‐L‐R circuit. The experimental results indicated that the DC current of 800 V/500 A could be successfully interrupted within 5 ms by the proposed technology. Moreover, the interruption process could be divided into two stages, the Stable and Unstable stages. In the Stable stage, the arc voltage linearly increased from 20 to 35 V, where the arc current was limited slightly. In the Unstable stage, the arc voltage would rapidly increase and exceed the supply voltage, where the current would be forced to zero. Finally, the double‐break LVDC vacuum switches, no matter in series or parallel, were difficult to improve the interruption capability, because of the asynchronous occurrence of the Unstable stage in series vacuum interrupters and the fast current‐commutation between parallel vacuum interrupters. This technology takes advantages of high interruption capability, short arcing time and low complexity, which is a promising solution to expand the application of vacuum switch to the LVDC power systems.

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Section: Physical Process In the Interruptionmentioning

confidence: 99%

“…Alferov et al. [17–19]studied the current interruption process in the presence of the axisymmetric TMF. Hanashiro et al.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Liu

Chen

et al. 2021

IET Generation Trans & Dist

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“…Lately, vacuum discharges with a typical current of 100 A and duration of 100 µs have been developed as a metal-ion source for a space-propulsion device of small satellites [1]. But, in general, vacuum arcs become unstable with decreasing arc current and hard to sustain for a long time [2], [3]. This characteristic is favorable for circuit breakers but limits the application of vacuum arcs to other areas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Axially Symmetric Magnetic Fields for Dynamics of Low-Current DC Vacuum Arc Plasma

Tsuruta

Yanagi

Shibata

et al. 2007

IEEE Trans. Plasma Sci.

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In this paper, effects of four types of axially symmetric magnetic fields on the dynamics of low-current dc vacuum arc plasma, which is less than 30 A, were examined. Arcs were ignited by the opening of the butt contacts made of zinc. In the axial magnetic field, the arc plasma was restricted within a column, and the arc voltage rose with increasing gap length. When a magnet was arranged behind the cathode, the cathode spot rotated in the opposite direction to the Lorentz force (−J × B) on the edge of the circular-rod cathode. On the other hand, when a magnet was arranged behind the anode, the arc plasma was constricted on the anode side, and the lifetimes of the arcs became longer, although the arc voltage rose with increasing gap length. The compression effect of the axial component of the magnetic field was analyzed by introducing a simple magnetic piston model, and the experimental diameters of the arc column showed a good agreement with the model. Index Terms-Arc voltage, axial magnetic field, axially symmetric transverse magnetic field, Lorentz force, low-current dc vacuum arc, retrograde motion of cathode spot.

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“…It is known that in general a vacuum arc can be controlled using a magnetic field. Several magnetic field distributions are used effectively in vacuum breakers [6][7][8][9]. Thus, in this research the authors create several magnetic field distributions by positioning one or two disk magnets behind the electrodes, and then evaluate the effects of the magnetic field on the duration characteristics of the arc and the behavior of the arc plasma by using the magnetic fields in a DC vacuum arc under 20 A. nent and the inductive component of the winding resistance used for current adjustment.…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on the behavior and sustaining characteristics of low‐current DC vacuum arc

Yanagi

Shibata

Yanagidaira

et al. 2007

Electrical Engineering Japan

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SUMMARYEffects of magnetic field on duration and dynamics of low-current DC vacuum arcs, less than 20 A, were examined. Without a magnetic field, the cathode spot moves at random on the cathode surface and the arc voltage is constant for increasing gap length up to 30 mm. In the axial magnetic field, the arc plasma was constricted and the arc voltage rose with increasing gap length. When a magnet was arranged behind the cathode, the cathode spot rotated in the opposite direction of the Lorentz force (j × B) on the edge of the cathode. On the other hand, when a magnet was arranged behind the anode, the arc column was constricted on the electrode axis and the lifetime of the arcs was extremely extended.

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Characteristics of DC vacuum arc in the transverse axially symmetric magnetic field

Cited by 5 publications

References 6 publications

Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Effect of Axially Symmetric Magnetic Fields for Dynamics of Low-Current DC Vacuum Arc Plasma

Effect of magnetic field on the behavior and sustaining characteristics of low‐current DC vacuum arc

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