TY - JOUR
T1 - The dynamic volt-ampere characteristics of a vacuum arc at intermediate-frequency under a transverse magnetic field
AU - Zhu, Liying
AU - Wu, Jianwen
AU - Liu, Bin
AU - Feng, Ying
PY - 2013/1
Y1 - 2013/1
N2 - 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.
AB - 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.
KW - Arc appearance
KW - Arc volt-ampere characteristic
KW - Intermediate frequency vacuum arc
KW - Phase shift
KW - Transverse magnetic field (TMF)
UR - https://www.scopus.com/pages/publications/84873117999
U2 - 10.1088/1009-0630/15/1/06
DO - 10.1088/1009-0630/15/1/06
M3 - 文章
AN - SCOPUS:84873117999
SN - 1009-0630
VL - 15
SP - 30
EP - 36
JO - Plasma Science and Technology
JF - Plasma Science and Technology
IS - 1
ER -