Proceedings of 2011 International Symposium on Electrical Insulating Materials最新文献_第9页

Partial discharge characteristics of twisted enameled magnet wires for inverter-fed random wound motors 逆变供电无绕线电机用扭曲漆包线的局部放电特性

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826365

Y. Kikuchi, M. Miyamae, Y. Fukuda, M. Nagata, T. Tuda, H. Tsutsui, T. Ikegami, T. Sakurai, S. Yamada, T. Yoshimitsu

引用次数: 1

Low loss and high dielectric constant poly(methyl methacrylate)/BaTiO3 nanocomposites prepared by in situ atom transfer radical polymerization 原位原子转移自由基聚合制备低损耗高介电常数聚甲基丙烯酸甲酯/BaTiO3纳米复合材料

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826329

Liyuan Xie, Xingyi Huang, P. Jiang

引用次数: 1

Charge dynamics as revealed by pulse discharge current spectra in polymer films 聚合物薄膜中脉冲放电电流谱所揭示的电荷动力学

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826323

F. Zheng, Chen Lin, Yewen Zhang, Z. An

引用次数: 0

Measurement of surface resistivity on gamma-ray irradiated polymer insulating materials 射线辐照聚合物绝缘材料表面电阻率的测量

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826374

Y. Gao, B. Du, J. Zhang

引用次数: 1

Influence of polymeric polarity on the interface of nanocomposites 聚合物极性对纳米复合材料界面的影响

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826317

Shengtao Li, G. Yin, Cheng Cheng, Jianying Li

引用次数: 1

Power module with new features for SiC devices 具有SiC器件新功能的电源模块

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826395

Y. Iizuka, N. Nashida, M. Horio, Y. Nakamura, Y. Ikeda

引用次数: 0

Coating of carbon nano-tube filled epoxy resin and its surface conductivity 碳纳米管填充环氧树脂涂层及其表面电导率

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826341

Hideyuki Nakatsu, M. Kozako, H. Toda, Hiroto Ebihara, K. Yoshinaga, M. Hikita, Daisuke Hirata, T. Miyamoto, M. Takei

{"title":"Coating of carbon nano-tube filled epoxy resin and its surface conductivity","authors":"Hideyuki Nakatsu, M. Kozako, H. Toda, Hiroto Ebihara, K. Yoshinaga, M. Hikita, Daisuke Hirata, T. Miyamoto, M. Takei","doi":"10.1109/ISEIM.2011.6826341","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826341","url":null,"abstract":"The aim of this study is to fabricate nanotubes (CNT)/epoxy nano-composites and coat them onto epoxy insulating substrates in order to reduce the surface resistivity. Dispersion agent was uniquely and newly prepared for uniform dispersion of CNT in an epoxy resin as polymer powder. An ultrasonic homogenizer was used for mixing an epoxy resin with commercial CNT and the prepared dispersion agent. The prepared suspension was coated on an epoxy insulating substrate using a spin coater under certain conditions. Cracked surface was observed with the field emission scanning electron microscope (FE-SEM) to check the dispersion of CNT. Surface resistivity was measured by an electrometer with a special test fixture at measurement. As a result, it was elucidated that grafting polymer molecules onto the CNT surface improves the dispersion of CNT in epoxy matrix compared to those containing CNT without functionalization. It was also shown that the surface resistivity of the nano-composites decreases because of more uniform dispersion of CNT. It was found that an addition of just 0.1 wt% CNT with the dispersion agent allows us to decrease the surface resistivity in two-digit.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127907933","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

Characteristic of acoustic emission signals generated by electric arc in on load tap changer 有载分接开关电弧声发射信号特性研究

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826306

A. Cichon, T. Borucki, T. Boczar, D. Zmarzły

{"title":"Characteristic of acoustic emission signals generated by electric arc in on load tap changer","authors":"A. Cichon, T. Borucki, T. Boczar, D. Zmarzły","doi":"10.1109/ISEIM.2011.6826306","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826306","url":null,"abstract":"Results of scientific research works considering technical condition diagnosis of on load tap changers (OLTC) by use of acoustic emission (AE) method are presented in the paper. OLTC are crucial part of electric power transformers. They enable for on load voltage regulation in the network. Reliable operation of these devices is important especially for distributive transformers but also for units working in mills and industrial plants vulnerable on occurrence of voltage value changes in the network. Operation of OLTC is connected with formation of electric arc which occurs on main contacts and also on resistor contacts. Intensity of this phenomenon depends among others on: scale of current flowing during switch over, wear and tear level of contacts, character of receptions etc. The aim of research works, results of which are presented in the paper, was to determine characteristic parameters, so called “finger prints”, for AE signals generated by ignition of electric arc and in particular determination of the corresponding time-frequency structures. The measurements were performed in a modeling assemble equipped with tap changer including separated selector and power changer that were supplied with single phase voltage, 50 V, forcing current flow, nominal value equal to 150 A. The measurements were performed for each phase separately each time forcing current flow through the contacts accruing to a single phase. Electric arc created during coupling and uncoupling of contacts generated AE signals which were registered with a measuring apparatus equipped with wide band transducer type WD AH-17. Analysis of achieved results was performed in the time-frequency domain by use of short time Fourier transform (STFT), continuous (CWT) and discrete (DWT) wavelet transform.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132474902","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: 3

PD detection under impulse voltage on an actual SF6 bus section with protrusion defects fixed on HV conductor 高压导体上固定有突出缺陷的SF6母线实际截面冲击电压下的局部放电检测

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826284

M. Ren, M. Dong, Zhong Ren, Lei Zheng, Yan-ming Li, A. Qiu

引用次数: 0

Understanding partial discharge activity in transformer oil due to particle movement under high frequency AC voltage adopting UHF technique 采用超高频技术研究高频交流电压下变压器油中微粒运动引起的局部放电活动

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826376

M. Archana, B. Kalpana, R. Sarathi

引用次数: 3