DC vacuum arc extinction in a transverse axisymmetric magnetic field

Alferov, D. F.; Belkin, Gary S.; Yevsin, D.V.

doi:10.1109/deiv.2008.4676813

Cited by 1 publication

(5 citation statements)

References 7 publications

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“…The composite TMFs avoid the excitation system [22] and improve the reliability of vacuum switch. In addition, novel technology avoids the risk of demagnetization of permanent magnet due to the high temperature during arcing [18]. Under the effect of the composite TMFs, the vacuum arc would rotate retrogradely on the ring contact.…”

Section: Discussionmentioning

confidence: 99%

“…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%

“…In the field of LVDC current interruption in vacuum, the technology proposed in this paper owns a higher interruption capability and shorter arcing time than other technologies [18,20,37]. The composite TMFs avoid the excitation system [22] and improve the reliability of vacuum switch.…”

Section: Advantages Of This Novel Current Interruption Technology In ...mentioning

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: Discussionmentioning

confidence: 99%