Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena最新文献

Ageing of polymers studied by spectral analysis of UWB partial discharge signals 用超宽带局部放电信号的光谱分析研究聚合物的老化

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483615

P. Morshuis

引用次数: 2

Electro-optical investigation of the dipole orientation in poled polymers 极性聚合物中偶极取向的电光研究

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483573

R. Gerhard-Multhaupt, S. Bauer, S. Bauer-Gogonea, W. Brinker, C. Dinger, W. Molzow, W. Wirges, Ş. Yilmaz

{"title":"Electro-optical investigation of the dipole orientation in poled polymers","authors":"R. Gerhard-Multhaupt, S. Bauer, S. Bauer-Gogonea, W. Brinker, C. Dinger, W. Molzow, W. Wirges, Ş. Yilmaz","doi":"10.1109/CEIDP.1995.483573","DOIUrl":"https://doi.org/10.1109/CEIDP.1995.483573","url":null,"abstract":"In order to exhibit low scattering losses and sufficiently large electro-optical or other nonlinear optical coefficients, polymers for active waveguide applications must be amorphous and contain molecular dipoles with large hyperpolarizabilities, respectively. Macroscopic effects are only possible if the dipoles have a poling-induced preferential orientation which is either uniform or suitably patterned within the optical guiding layer. Since the linear electro-optical or Pockels effect is one of the strongest and most useful effects in such poled polymers, it can also be employed for investigating the magnitude, the spatial distribution, and the stability of the dipole orientation. Novel and modified experimental techniques such as scanning electro-optical microscopy, electro-optical phase-shift interferometry and electro-optical thermal analysis are described. And typical results of such measurements are presented. It is demonstrated that the Pockels effect leads to experimental tools that are of similar value for investigating polar dielectric materials as those based on the quadratic electro-optical or Kerr effect.","PeriodicalId":121919,"journal":{"name":"Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena","volume":"424 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122915209","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

State of water vapour in SF/sub 6/ and several kinds of gases and its effect on partial discharge SF/sub / 6和几种气体中水蒸气的状态及其对部分排放的影响

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483595

T. Watabe, S. Itahashi, H. Mitsui, M. Sone

引用次数: 1

Discharge behavior observed by Pockels effect - surface charge distribution measurement 用波克尔斯效应观察放电行为-表面电荷分布测量

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483768

Y. Zhu, T. Takada, D. Tu

引用次数: 1

Insulator surface conduction state and surface flashover voltage 绝缘子表面导通状态和表面闪络电压

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483763

A. Vlastós, J. Hultén

引用次数: 1

Insulator surface flashover with UV and plasma background and external magnetic field 绝缘子表面闪络与紫外线和等离子体背景和外磁场

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483603

F. Hegeler, H. Krompholz, L. Hatfield, M. Kristiansen

{"title":"Insulator surface flashover with UV and plasma background and external magnetic field","authors":"F. Hegeler, H. Krompholz, L. Hatfield, M. Kristiansen","doi":"10.1109/CEIDP.1995.483603","DOIUrl":"https://doi.org/10.1109/CEIDP.1995.483603","url":null,"abstract":"Surface flashover often sets the limit on the maximum voltage of a system in vacuum. UV irradiation and/or plasma will further decrease the flashover potential. This experiment investigates the UV and plasma induced dielectric surface flashover, emphasizes the early phase of breakdown, and uses external magnetic fields to increase the surface flashover potential. In our experimental apparatus, a dc voltage up to 60 kV or a voltage pulse (up to 100 kV with 200 ns duration) is applied to the test gap. The geometry of all interconnecting lines and of the discharge chamber is coaxial and the impedances are closely matched. The current, voltage, and soft X-rays are recorded. The plasma is generated by an electron cyclotron resonance plasma source and the UV radiation originates from a UV enhanced dc Xenon arc lamp. External magnetic fields influence the current in the pre-flashover phase. With a magnetic flux density of only 30 mT, the flashover potential of a UV induced breakdown increases by up to a factor of 4. With a plasma background, the duration of an applied voltage pulse can be increased by a factor of 2 without causing flashover.","PeriodicalId":121919,"journal":{"name":"Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124122387","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

Evaluation of EPDM rubber for high voltage insulator 高压绝缘子用三元乙丙橡胶的性能评价

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483765

Y. Kurata, K. Takano, K. Sakuraba, M. Hayashi

{"title":"Evaluation of EPDM rubber for high voltage insulator","authors":"Y. Kurata, K. Takano, K. Sakuraba, M. Hayashi","doi":"10.1109/CEIDP.1995.483765","DOIUrl":"https://doi.org/10.1109/CEIDP.1995.483765","url":null,"abstract":"This paper describes the fundamental characteristics of EPDM (ethylene propylene rubber) which is applied as a high voltage insulation material. Also recently, polymer compounds have been applied as high voltage insulation materials. EPDM rubber is inferior in weather resistance to silicone rubber. However, we found that the addition of carbon black results in an excellent weathering property of EPDM rubber without any degradation of tracking resistance. We also improved the electrical tracking resistance of EPDM rubber by adding alumina trihydrates (ATH) as fillers. The compound shows excellent physical properties and low cost in comparison with silicone rubber. We carried out a tracking test which followed IEC pub. 587 as a short term evaluation, and the rotating wheel dip test as a long term evaluation test. Furthermore, the xenon-arc radiation exposure test was carried out as an accelerated weathering test. From the results of the tracking test, we found that the tracking resistance is dependent upon the particle diameter of alumina trihydrates and the compound with a small particle filler has less weight loss than that with larger ones. As one of high voltage insulation applications, we applied EPDM to a polymer housing arrestor and evaluated the electrical characteristics of the polymer housing.","PeriodicalId":121919,"journal":{"name":"Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127939168","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: 12

Failure mechanism of the interturn insulation of low voltage electric machines fed by pulse controlled inverters 脉冲控制逆变器供电低压电机匝间绝缘失效机理研究

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483711

M. Kaufhold

引用次数: 201

Recognition of discharge patterns during ageing 识别老化过程中的放电模式

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483733

A. Krivda

引用次数: 0

Charge trapping/detrapping induced lattice polarization/relaxation processes 电荷捕获/去捕获诱导晶格极化/弛豫过程

Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1995-10-22 DOI: 10.1109/CEIDP.1995.483570

G. Blaise

引用次数: 8