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Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986最新文献

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Optical studies of electrokinetic processes in flowing oil 流动油中电动力学过程的光学研究
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726450
M. J. Lee, J. K. Nelson, P. Shin
{"title":"Optical studies of electrokinetic processes in flowing oil","authors":"M. J. Lee, J. K. Nelson, P. Shin","doi":"10.1109/CEIDP.1986.7726450","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726450","url":null,"abstract":"Dielectric liquids subjected to enforced motion in narrow ducts exhibit anomalous but reproducible breakdown behavior[1]. Furthermore the velocity dependent dielectric integrity of such an arrangement is characteristically different for sustained and impulse electric stress[2-4]. The physical mechanisms responsible for electrical breakdown in these circumstances are complex since it is known that both electrohydrodynamic (EHD) phenomena and streaming electrification are present to influence prebreakdown events [2].","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115803188","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
Kerr electro-optic field mapping measurements in high voltage stressed liquid and gaseous sulfur hexafluoride 克尔电光场测绘测量高压应力液体和气体六氟化硫
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726456
R. Carreras, M. Zahn
{"title":"Kerr electro-optic field mapping measurements in high voltage stressed liquid and gaseous sulfur hexafluoride","authors":"R. Carreras, M. Zahn","doi":"10.1109/CEIDP.1986.7726456","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726456","url":null,"abstract":"When stressed by high electric fields, liquid and gaseous SF6 become detectably birefringent. Liquid SF6 at ∼350 psi and room temperature has a Kerr constant on the order of 10−15 m/V2 for light at the free space wavelength of 633nm, which is comparable to values reported for transformer oil, polyethylene, and PMMA. The Kerr constant of gaseous SF6 is measured to strongly decrease with density. Electric field measurements between coaxial cylindrical electrodes are described where the inner cylinder is entirely supported by a half round cylinder of PMMA. The aim of these measurements is to describe surface charge accumulation at a solid/gas interface and its effect on surface discharges.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130339268","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
Internal discharge pulse measurement using a microcomputer 内部放电脉冲测量采用微电脑
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726480
H. Matsuzaki, T. Ito, Y. Ehara, T. Sakai, P. Mckenny, M. S. A. A. Hammarn
{"title":"Internal discharge pulse measurement using a microcomputer","authors":"H. Matsuzaki, T. Ito, Y. Ehara, T. Sakai, P. Mckenny, M. S. A. A. Hammarn","doi":"10.1109/CEIDP.1986.7726480","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726480","url":null,"abstract":"The purpose of this research was to predict breakdown of electrical equipment due to deterioration of insulation. An internal discharge pulse measurement system which could analyze the distribution of the discharge according to each phase area of the applied voltage (AC 50Hz) was developed. The system's features were as follows. A half cycle of the applied voltage starting from the negative peak and ending at the positive peak was divided into nine equal phase areas. The distribution of the discharge in each phase area was expressed with a three dimensional displaying method whose dimensions were discharge magnitude (q), number of pulses (n), and time (t).","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125782630","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: 5
Thermally stimulated currents in polyethylene/ionomer blend. I. Effect of poling temperature, time and voltage 聚乙烯/离聚物共混物中的热刺激电流。一、极化温度、时间、电压的影响
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726424
K. Suh, J. Tanaka, D. Damon
{"title":"Thermally stimulated currents in polyethylene/ionomer blend. I. Effect of poling temperature, time and voltage","authors":"K. Suh, J. Tanaka, D. Damon","doi":"10.1109/CEIDP.1986.7726424","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726424","url":null,"abstract":"In a recent paper [1] the use of measurements of thermally stimulated currents (TSC) to study the annealing of a polyethylene/ionomer blend was reported. TSC's for this blend changed considerably in several days of combined thermal and voltage aging at 70°C and +48 kV/cm. No change in the TSC's were observed in pure polyethylene. Further characterization of the blends was done using thermal analysis and microscopy. The thermal and mechanical characteristics of the blends were observed to change for up to two weeks of annealing. After two weeks, further annealing produced only minor changes. Two distinct melting endotherms developed in the annealing and correspondingly morphological changes were observed microscopically in the cryofracture surfaces. This may indicate that the ionic component is one of the controlling factors in the TSC characteristics of this blend, because the ionomer, one component of the blend, has the ionic phases which exist as ionic multiplets and/or clusters [2] and the ionic phases may modify the internal field profile upon poling at high electric field. Therefore, for understanding the aging characteristies of the polyethylene/ionomer blend, the study of the charge storage mechanisms of these blends is needed.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"190 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128743500","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
Negative point-to-plane corona discharge in humid air — The effect of gap space on ionic species 湿润空气中负的点对面电晕放电。间隙对离子种类的影响
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726487
J. Skalný
{"title":"Negative point-to-plane corona discharge in humid air — The effect of gap space on ionic species","authors":"J. Skalný","doi":"10.1109/CEIDP.1986.7726487","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726487","url":null,"abstract":"A mass-spectrometric study of negative ions, extracted through small orifice in a plane electrode, was carried out in flowing ambient air, having relative humidities within the range of 40% to 50% and pressures from 5 kPa to 30 kPa. The effect of distance between the point and plane electrodes, as well as the effect of discharge current, on the mass spectra has been investigated. A most important observation was the presence of cluster ions CO<inf>3</inf><sup>−</sup>·(H<inf>2</inf>O). Other ions were also found mostly in cluster forms. An unknown cluster ion having e/m = 126 was found, in agreement with earlier reported experiments (de Vries, et. al.). The increase of electrode gap distance caused a reduction of O<inf>3</inf><sup>−</sup>·(H<inf>2</inf>O). groups and an increase of O<inf>3</inf><sup>−</sup>·(H<inf>2</inf>O)<inf>i</inf> groups of ions as Observed in the mass-spectra. The efficiency of corona treatment of polymer materials in air will also be discussed in relation to the obtained results.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121874791","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
Anomalous photovoltaic effects in polyethylene films incorporated with silicon 硅掺杂聚乙烯薄膜中的反常光伏效应
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726442
D. Liu, S. H. Kim, F. Liu, C. Xu, K. Kao
{"title":"Anomalous photovoltaic effects in polyethylene films incorporated with silicon","authors":"D. Liu, S. H. Kim, F. Liu, C. Xu, K. Kao","doi":"10.1109/CEIDP.1986.7726442","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726442","url":null,"abstract":"The possibility of using polymer or organic films for photovoltaic or electret devices has been investigated by many investigators(1–5). In general, the open-circuit photovoltage in photovoltaic devices is much smaller than the potential difference across the energy gap of the materials if the mechanism responsible for the photovoltaic effects is due either to Schottky barrier, or to p-n junction or p-i-n structure. However, some materials in thin film form exhibit a high open-circuit photovoltage when exposed to intense light and in some cases the photovoltage can be much large than the potential difference across the energy gap(6). In the studies of photoelectric effects in polymers most work is concentrated on photo-conduction, and comparatively little has been reported on photovoltaic effects. Recently we have observed some anomalous photoelectric phenomena in polyethylene films without and with silicon incorporation. The purpose of this paper is to report these new results.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133647780","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
See measurements on bulk samples of lucite and lexan 参见测量的散装样品的萤光石和lexan
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726489
L. Hatfield, M. Baker, E. R. Boerwinkle
{"title":"See measurements on bulk samples of lucite and lexan","authors":"L. Hatfield, M. Baker, E. R. Boerwinkle","doi":"10.1109/CEIDP.1986.7726489","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726489","url":null,"abstract":"The measurement of secondary electron emission (SEE) coefficients of many materials is covered in detail in the book by Bruining [1]. Some of the current interest in the SEE is generated by the importance of the electron multiplication process in the surface flashover of insulators in high voltage equipment [2]. Measurement of the SEE on the surface of dielectrics is difficult and only a few reports exist in the literature [3]. The major experimental problem is the charging which occurs on the dielectric surface when the SEE coefficient is not equal to one. This problem has been overcome by some experimenters by using such thin films of the dielectric that charge deposited on the surface would leak off rapidly through the material in spite of the high resistivity [4]. This approach is suitable for investigating the fundamental properties of materials but may not be relevant to the properties of, a commercially produced material from which an insulator is produced. Accordingly, we have devised a method by which bulk samples can be tested.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131763042","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
Trapped charge distributions in PMMA from energetic electron irradiation by electro-optic measurements 电光测量高能电子辐照下PMMA中捕获电荷分布
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726421
C. Cooke, K. Wright, M. Hikita, M. Zahn
{"title":"Trapped charge distributions in PMMA from energetic electron irradiation by electro-optic measurements","authors":"C. Cooke, K. Wright, M. Hikita, M. Zahn","doi":"10.1109/CEIDP.1986.7726421","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726421","url":null,"abstract":"The penetration of energetic electrons into materials is an important fundamental process which is useful in understanding radiation effects, such as crosslinking, and also in evaluating damaging effects from charge accumulation such as in spacecraft charging. While energy deposition is well known by traditional dose measurement methods, there is relatively little experimental information about net charge distributions and electric fields which accumulate within insulators as a result of electron beam bombardment, especially in the MeV incident energy range.","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132353521","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
Dielectric processes in heavy oils — III. Evidence for cooperative behavior among polar species 重油中的介电过程。III。极地物种间合作行为的证据
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726460
H. Maruska
{"title":"Dielectric processes in heavy oils — III. Evidence for cooperative behavior among polar species","authors":"H. Maruska","doi":"10.1109/CEIDP.1986.7726460","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726460","url":null,"abstract":"Dielectric spectroscopy was used as a technique for charting the course of the nature and/or number density of polar molecules resulting from physical or chemical changes in heavy hydrocarbon fluids. This effort was based on the use of an oscillating electric field to impose a time-varying macroscopic polarization on a system by attempting to force the alignment of the permanent dipoles associated with the molecules under investigation. The real part of the dielectric permittivity ε' is proportional to the nature (i.e., physical size) and number density of the permanent dipoles responding in the system. Theoretical and experimental aspects of the technique are well understood in the case of simple molecules (1).","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124921204","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
Charge injection and distribution in polymeric insulation systems 聚合物绝缘系统中的电荷注入和分布
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986 Pub Date : 1986-11-01 DOI: 10.1109/CEIDP.1986.7726468
T. Baumann, P. Pfluger, F. Stucki, H. Zeller
{"title":"Charge injection and distribution in polymeric insulation systems","authors":"T. Baumann, P. Pfluger, F. Stucki, H. Zeller","doi":"10.1109/CEIDP.1986.7726468","DOIUrl":"https://doi.org/10.1109/CEIDP.1986.7726468","url":null,"abstract":"The build up of space charge above a critical field strength, Fc, can be regarded as an important mechanism for electrical tree nucleation and ageing [1]. For voltage ramps of msec, a homogeneous space charge cloud grows instantaneously if Vc, the voltage at which F = Fc, is surpassed. As a consequence, F will never be exceeded: we deal with field limiting space charge (FLSC model of ref. 1+2). Within our model, the microscopic physical interpretation of Fc is the field at which charge carriers change from very low, trap-controlled mobility to a high mobility [1,2]. In order to test experimentally the concept of injection of mobile carriers and concomitant formation of a homogeneous space charge zone around a point of field enhancement, a needle-plate geometry was chosen. The basic ideas and the quantitative predictions of the FLSC model could be verified [2,3].","PeriodicalId":354533,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1986","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115632083","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: 7
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