The Dynamic Volt-Ampere Characteristics of a Vacuum Arc at Intermediate-Frequency Under a Transverse Magnetic Field

In this study, the changes of a vacuum arc＇s appearance were observed and the volt-ampere characteristics of the vacuum arc at intermediate frequency were analyzed under a transverse magnetic field （TMF）. The TMF and phase shift time were calculated by using the TMF contact model and the large phase...

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Bibliographic Details
Published inPlasma science & technology Vol. 15; no. 1; pp. 30 - 36
Main Author 朱立颖 武建文 刘斌 冯英
Format Journal Article
LanguageEnglish
Published 2013
Subjects
Contact
Correlation
Dispersions
Electric potential
Elongation
Magnetic fields
Phase shift
TMF
Volt-ampere characteristics
Voltage
中频
伏安特性
分散过程
横向磁场
电弧电压
电弧运动
真空电弧
Online AccessGet full text
ISSN1009-0630
DOI10.1088/1009-0630/15/1/06

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Summary:In this study, the changes of a vacuum arc＇s appearance were observed and the volt-ampere characteristics of the vacuum arc at intermediate frequency were analyzed under a transverse magnetic field （TMF）. The TMF and phase shift time were calculated by using the TMF contact model and the large phase shift of the magnetic field at a higher frequency was conductive to the dispersion process of residual plasma. The arc velocity was higher at 800 Hz than at 400 Hz. It can be inferred that TMF will encourage arc movement at 800 Hz. Moreover, the arc movement has an impact on the arc voltage. Because of the increasing length of the arc column with a high arc velocity, the elongated arc causes the arc voltage to increase. Specifically, the volt-ampere characteristics of the vacuum arc are divided into three stages in this paper. The higher the frequency, the greater the initial rate of rise in the arc voltage and the larger the area surrounded by arc volt-ampere characteristics. The correlations between the arc voltage and the amplitude and frequency of the current are also presented.
Bibliography:arc appearance, arc volt-ampere characteristic, transverse magnetic field（TMF）, intermediate frequency vacuum arc, phase shift
ZHU Liying, WU Jianwen , LIU Bin , FENG Ying（1Automation Science and Electrical Engineering, BeiHang University, Beijing 100191, China 2China Electric Power Research Institutes, Beijing 100192, China）
In this study, the changes of a vacuum arc＇s appearance were observed and the volt-ampere characteristics of the vacuum arc at intermediate frequency were analyzed under a transverse magnetic field （TMF）. The TMF and phase shift time were calculated by using the TMF contact model and the large phase shift of the magnetic field at a higher frequency was conductive to the dispersion process of residual plasma. The arc velocity was higher at 800 Hz than at 400 Hz. It can be inferred that TMF will encourage arc movement at 800 Hz. Moreover, the arc movement has an impact on the arc voltage. Because of the increasing length of the arc column with a high arc velocity, the elongated arc causes the arc voltage to increase. Specifically, the volt-ampere characteristics of the vacuum arc are divided into three stages in this paper. The higher the frequency, the greater the initial rate of rise in the arc voltage and the larger the area surrounded by arc volt-ampere characteristics. The correlations between the arc voltage and the amplitude and frequency of the current are also presented.
34-1187/TL
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ISSN:1009-0630
DOI:10.1088/1009-0630/15/1/06