2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)最新文献_第9页

Experimental investigation of electrode erosion of triggered spark gap 触发火花间隙电极侵蚀的实验研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763958

Wei Zhong, Yunlong Liu, A. Xu, Shaohuang Shang, D. Jin

{"title":"Experimental investigation of electrode erosion of triggered spark gap","authors":"Wei Zhong, Yunlong Liu, A. Xu, Shaohuang Shang, D. Jin","doi":"10.1109/DEIV.2016.7763958","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763958","url":null,"abstract":"Electrode erosion and particulate sputtering would be inevitable in gas spark gap, which could affect its dielectric performance and reliability. To analyze the process of electrode-to-electrode sputtering in gas spark gap, this paper conducted discharge experiments between Mo and W electrodes and analyzed the results with scanning electron microscopy (SEM). Results indicated that main electrodes began sputtering particles to each other after 10 shots, and its distribution range extended with larger sputtering velocities and angles. However, even after only one shot, W particulates are sputtered and found on the surface of opposite electrode, its diameters being 1.5μm or so. And clear erosion cracks, pits and sputtered particulates for tungsten are observed more early than molybdenum. After 500 or even more shots, craters and cracks of the erosion that appear on the Mo electrode surface become more and more significant, and finally more heavy than W electrodes. It is reasonable that electrodes erosion (cracks, craters, sputtered particulates etc.) could be related to fatigue life of electrode materials.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134409688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Prediction of synchronous closing time on permanent magnet actuator for vacuum circuit breaker based on PSO-BP 基于PSO-BP的真空断路器永磁驱动器同步合闸时间预测

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763946

Hou Chunguang, Yu Xiao, Cao Yundong, Lai Changxue, Cao Yuchen

引用次数: 0

Distribution of high-voltage and high frequency impulse breakdown sparks in conditioned contact surface 条件接触面高压高频脉冲击穿火花的分布

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748668

Xiaoshe Zhai, W. Zhang, X. Yao, Yajun Guo, Jianhua Wang, Yingsan Geng, Zhiyuan Liu

{"title":"Distribution of high-voltage and high frequency impulse breakdown sparks in conditioned contact surface","authors":"Xiaoshe Zhai, W. Zhang, X. Yao, Yajun Guo, Jianhua Wang, Yingsan Geng, Zhiyuan Liu","doi":"10.1109/DEIV.2016.7748668","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748668","url":null,"abstract":"The objective of this paper is to experimentally investigate the distribution of high-voltage and high-frequency (HVHF) impulse breakdown sparks in conditioned contact surface. A 10 kV commercial vacuum interrupter (VI) is used, which is machined with a glass envelope and an observing window on the main shield. The distribution of the breakdown position in contact surface follows the Gaussian probability density. The breakdown sparks gradually concentrate in the center of contact surface, with a continue applying of the impulse voltage after a sufficient conditioning process. The frequency of the impulse voltage has slight impact on the distribution of breakdown sparks. However, a higher amplitude of the impulse voltage results in a more concentrative distribution of the breakdown sparks. The larger of the contact gap, the more concentrative of the breakdown sparks in contact surface. The mean value μ of the breakdown position in contact surface shifts to the lower h value of the contact edge gap. The higher of the non-parallelism of the facing contact surface, the more concentrative of the breakdown sparks.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129481593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on the dynamic of cathode spot of vacuum arc in external transverse magnetic field 外横向磁场作用下真空电弧阴极光斑动态的实验研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748721

Cong Wang, Z. Shi, Bingzhou Wu, S. Jia, Lijun Wang

引用次数: 2

Study of microscopic electric field on contact surface in vacuum interrupters based on fractal theory 基于分形理论的真空灭流器接触面微观电场研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748667

Yingyao Zhang, Yuhao Fang, Lijun Jin, Yewen Zhang

引用次数: 2

The influence of current interruption operations on internal pressure in vacuum interrupters 断流操作对真空断流器内压的影响

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748696

M. Weuffel, D. Gentsch, G. Nikolić, A. Schnettler

引用次数: 1

The autograph method for investigation arcs in vacuum and in gases at threshold currents 在阈值电流下研究真空和气体中电弧的签名法

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7748742

A. Murzakaev

{"title":"The autograph method for investigation arcs in vacuum and in gases at threshold currents","authors":"A. Murzakaev","doi":"10.1109/DEIV.2016.7748742","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748742","url":null,"abstract":"The present paper reports an experimental study of craters on the surface of cathodes of pulsed arc under the influence of surface conditions (contaminants and clean), weak transverse magnetic fields in vacuum and ambient gases (argon, nitrogen with high purity introduced with pressures from 50 Torr up to 800 Torr) with cold cathodes. The autograph method was used to investigate the arc spot motion over a cathodes under a magnetic field of H = 0.1-0.7 T in the range of current 2-50 A. Erosion traces have been studied of wires cathodes from Au, Ag, Cu, W. The analysis of arc voltage and arc current fluctuations in vacuum and in gas shows that the spot operates in cycles that include extremely non-stationary periods with time constants about 10-50 ns for all cathodes from Au, Ag, Cu, W. At the surfaces of Au, Ag, Cu cathodes in vacuum and in gases there remain numerous small craters (diameter <; 6 mkm). Such spots are type 1, in contrast to clean surface spots (type 2). Erosion traces clean surfaces of W cathodes in vacuum and in gases consist of overlapping craters which form a coherent chain. It appears that the elementary spot processes (plasma production, electron emission, retrograde movement, average cycle duration, current density) are not changed by outer influences as magnetic field or background gas. The current density measured at the moment of cathode spot death is (1 ± 0.9) × 1011 A/m2. Neither the current density nor the cathode spot lifetime depends on current.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128736070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparative study between Cu and CuCr electrode using two-dimensional particle density image over vacuum arc discharge 真空电弧放电中Cu和CuCr电极二维粒子密度图像的对比研究

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7763964

Y. Inada, T. Kamiya, S. Matsuoka, A. Kumada, H. Ikeda, K. Hidaka

引用次数: 1

Vacuum arc ion source with compound cathode and beam separation by bending magnet 复合阴极弯曲磁体束分离真空电弧离子源

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7764029

K. Savkin, E. Oks, V. Gushenets, V. Frolova, A. Nikolaev, G. Yushkov

引用次数: 1

Influence of structure and TiAl3/TiAlN intermetallic coatings on the corrosion behavior of austenics steels 组织和TiAl3/TiAlN金属间化合物涂层对奥氏体钢腐蚀行为的影响

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI: 10.1109/DEIV.2016.7764019

E. Vardanyan, I. Yagafarov, K. Ramazanov, A. Khamzina, N. A. Amirhanova

{"title":"Influence of structure and TiAl3/TiAlN intermetallic coatings on the corrosion behavior of austenics steels","authors":"E. Vardanyan, I. Yagafarov, K. Ramazanov, A. Khamzina, N. A. Amirhanova","doi":"10.1109/DEIV.2016.7764019","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764019","url":null,"abstract":"Corrosive attack is one of the most frequent reasons of machine components failure. As is known part service properties substantially depend on surface layer state and structure, obtained after complete processing. Various coatings are widely used to improve service properties. It is also known that an intermetallic compounds are beneficial in many aspects. Ti-Al coatings were compared in the studied. The coatings were deposited by vacuum arc plasma. An intermetallic compound was synthesized during the Ti-Al coating deposition. Phase composition and corrosion behavior of the coatings were investigated by means X-ray diffraction and electrochemical tests. Potentiodynamic curves in corrosive medium were made before and after coating deposition on heat-resistant high alloy steel. Corrosion currents were calculated using the potentiodynamic curves. General regularities of the steel corrosion were established using the potentiodynamic curves. Interdependence between surface state phase composition and corrosion rate was studied.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125989127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0