纵向磁场滞后对快速过零阶段真空电弧阴极斑点分布的影响

贾申利; 宋晓川; 史宗谦; 王立军; 张营奎

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The Influence of Lagged Axial Magnetic Field on the Distribution of Cathodes Spots in Current-zero Stage of Vacuum Arc

首发时间：2013-03-26

Jia Shenli ¹
Jia Shenli was born in Shaanxi, China,in 1968. He received the B.S., M.S., and Ph.D.degrees in electrical engineering from Xi\'an Jiaotong University, Xi\'an, China, in 1989, 1993, and 1997,respectively.From July 1989 to September 1990, he was with the High Power Laboratory, Xi’an High Voltage Apparatus Research Institute, the most authorized certi?cation test laboratory in China, as a Test Engineer. He is currently a Professor with the State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, where he is also the Director of the High Power Laboratory. His ?elds of interest include vacuum arcs and switches, high-power test technology, and application of arc discharges in nanomaterial fabrication. Dr. Jia is a Member of the Chinese Society for High Power Test Technology.
Song Xiaochuan ² Shi Zongqian ² Wang lijun ² Zhang Yingkui ²

1、the State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi\'an 710049
2、the State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi'an 710049

Abstract：The influence of lagged axial magnetic field (AMF) due to eddy current induced in contacts system on the distribution of cathode spots (CSs) in current-zero stage of vacuum arc with different current falling rates was investigated experimentally. Experiments were conducted with cup-shaped AMF contacts in a demountable vacuum chamber. The characteristic of CSs distribution of triggered vacuum arc in current-zero stage with arc current frequency of 50Hz was investigated at first with the aid of a high-speed digital camera with an exposure time of 2 microseconds. Then the characteristic of CSs distribution with faster current falling rate, which was realized by injecting a countercurrent with frequency of 500Hz or 1kHz, was investigated. Moreover, the lagged AMF flux density in current-zero stage with different current falling rates was calculated by ANSYS. Research results showed that CSs located in the center of contact plate tended to extinguish earlier than those at periphery of contact plate in fast current-zero stage due to the stronger lagged AMF in contact center.

keywords： Vacuum arc Cathode spot Axial magnetic field

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纵向磁场滞后对快速过零阶段真空电弧阴极斑点分布的影响

贾申利 ¹
Jia Shenli was born in Shaanxi, China,in 1968. He received the B.S., M.S., and Ph.D.degrees in electrical engineering from Xi\'an Jiaotong University, Xi\'an, China, in 1989, 1993, and 1997,respectively.From July 1989 to September 1990, he was with the High Power Laboratory, Xi’an High Voltage Apparatus Research Institute, the most authorized certi?cation test laboratory in China, as a Test Engineer. He is currently a Professor with the State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, where he is also the Director of the High Power Laboratory. His ?elds of interest include vacuum arcs and switches, high-power test technology, and application of arc discharges in nanomaterial fabrication. Dr. Jia is a Member of the Chinese Society for High Power Test Technology.
宋晓川 ² 史宗谦 ² 王立军 ² 张营奎 ²

1、电力设备电气绝缘国家重点实验室，西安交通大学，西安 710049
2、电力设备电气绝缘国家重点实验室，西安交通大学，西安，710049

摘要：本文通过实验研究了电极系统中涡流引起的纵向磁场滞后对快速过零阶段真空电弧阴极斑点分布的影响。实验在可拆卸真空灭弧室内进行，采用杯状纵磁电极。首先，采用高速相机拍摄了工频下的触发真空电弧在电流过零阶段阴极斑点分布的图片，高速相机的曝光时间为2微秒。其次，通过投入频率为500Hz和1kHz的高频反向电流，研究了电流快速过零阶段内阴极斑点分布的特性。此外，利用ANSYS计算了快速过零阶段电极间滞后的纵向磁场的分布。研究结果表明，由于在电极中心区域滞后的纵向磁场较强，在电流快速过零阶段，位于电极中心区域的阴极斑点比位于电极边缘区域的阴极斑点先熄灭。

关键词：真空电弧阴极斑点纵向磁场

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Jia Shenli,Song Xiaochuan,Shi Zongqian,et al. The Influence of Lagged Axial Magnetic Field on the Distribution of Cathodes Spots in Current-zero Stage of Vacuum Arc[EB/OL]. Beijing:Sciencepaper Online[2013-03-26]. https://www.paper.edu.cn/releasepaper/content/201303-860.

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论文编号	201303-860
论文题目	纵向磁场滞后对快速过零阶段真空电弧阴极斑点分布的影响
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