IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第9页

Long guided surface discharge investigations 长导地面放电调查

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634610

R. Fouracre, E. Bryce, M. Given, S. MacGregor, S. Turnbull

引用次数: 1

A study on the deterioration of LDPE and epoxy insulation by partial discharge LDPE和环氧绝缘局部放电劣化的研究

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641124

Y. Sekii, T. Sugai

引用次数: 5

Partial discharge detection technique using electro-optic effect 利用电光效应的局部放电检测技术

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634607

J. Koo, Y. Chang, S. Noh

{"title":"Partial discharge detection technique using electro-optic effect","authors":"J. Koo, Y. Chang, S. Noh","doi":"10.1109/CEIDP.1997.634607","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634607","url":null,"abstract":"In this work, a possible new PD detection technique, based on the electro-optic effect (Pockels effect), has been proposed. Generally, commercialized nonlinear electro-optic (EO) crystals have some defects and hysteretic characteristics of which the loop is shifted downward ascribed to the microscopic change of polarization /spl Delta/P in these defects. The refractive index ellipsoid of EO crystal, such as LiNbO/sub 3/, is changed by both the externally applied electric field and its hysteresis loop of which the effect gives rise to a discrepancy of index variation. Therefore, considering the influence of hysteretic characteristics an equation is newly proposed in connecting with the phase variation of modulated laser beam through LiNbO/sub 3/ crystal under applied electric field. For this purpose, PD generated from needle-plane electrode in air has been detected by use of LiNbO/sub 3/ cell and our proposed equation is experimentally approved. As a result, it is observed that PD measurable phase intervals are limited by the crystal characteristics such as asymmetrical P-E hysteresis and half-wave voltage. The number of PD pulse occurrence and its magnitude were observed to be increased with applied voltage, which may imply that it is possible to detect PD by this newly proposed electro-optic method.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114571210","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: 2

Development of a 1 kW, 200/spl deg/C Mapham inverter utilizing high temperature components 利用高温元件开发1 kW, 200/spl度/C的Mapham逆变器

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634592

A. Hammoud, S. Gerber, E. Baumann, E. Overton

{"title":"Development of a 1 kW, 200/spl deg/C Mapham inverter utilizing high temperature components","authors":"A. Hammoud, S. Gerber, E. Baumann, E. Overton","doi":"10.1109/CEIDP.1997.634592","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634592","url":null,"abstract":"Electronic systems and components often exposed to high temperature environment in space-based applications, nuclear power facilities, and geothermal energy extraction fields. A key requirement for these systems is, therefore, to withstand the high temperature exposure while maintaining efficient and reliable operation. Efforts were taken to design and develop a high temperature power inverter capable of 200/spl deg/C operation. In this work, a 1 kW, 20 kHz Mapham inverter was designed and built utilizing components developed for high temperature operation. These components, which included capacitors, inductors, transformers, were developed and demonstrated at 200/spl deg/C. The inverter system was evaluated as a function of temperature at different load levels. The inverter system, excluding its input, control and logic circuitries, was characterized at temperatures from ambient to 200/spl deg/C at 0%, 50%, and 100% resistive loading. With an applied input voltage of 75 VDC, the inverter produced an output of 250 VAC. The results obtained, which have indicated good operational characteristics of the inverter up to 200/spl deg/C, are presented and discussed.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117004650","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

High-field electrical properties of LDPE films prepared using new catalyst 新型催化剂制备的LDPE薄膜的高场电性能

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634582

K. Ishimatsu, C. Banmongkol, T. Mori, T. Mizutani, M. Ishioka

引用次数: 4

Stability of the electrical resistance and mechanism of conductivity of the composite semiconducting materials 复合半导体材料的电阻稳定性及导电机理

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634594

R. Malamud

{"title":"Stability of the electrical resistance and mechanism of conductivity of the composite semiconducting materials","authors":"R. Malamud","doi":"10.1109/CEIDP.1997.634594","DOIUrl":"https://doi.org/10.1109/CEIDP.1997.634594","url":null,"abstract":"Summary form only given. Semiconducting composite materials with electrical insulation matrix and semiconducting fillers have been investigated with the aim of producing them with stable resistance for equalizing electrical field intensity in high-voltage turbogenerator winding insulation. For semiconducting fillers, different kinds of silicon carbide powders (SiC), soot carbon, and copper-bearing glass fiber tape have been used. For insulation binder ternary epoxy compounds and oil-glyptal enamel have been used. The mechanism for the operation of semiconducting compositions has been analyzed on the basis of obtained dependencies of the magnitude of the electrical resistance and its non-linear coefficient from electrical field intensity for compositions with different concentrations of semiconducting fillers, and by its correlation with a mathematical model of conductivity for semiconducting grain conglomerate. On the basis of the understanding of the two mechanisms: (i) the semiconducting structure formation and (ii) the operation such compositions, semiconducting materials with stable characteristics have been developed. The stability of the materials developed has been confirmed by testing and using them for a long time in high-voltage winding of the turbogenerators and hydrogenerators, produced by the Large Electrical Machines Plant \"Electrotyazhmash\" (Kharkov, Ukraine/), where this work was done.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115411613","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

Numerical evaluation of the efficacy of booster sheds and RTV coating in improving the performance of HVDC wall bushings 升压棚和RTV涂层改善高压直流墙衬套性能的数值评价

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641098

L. Tang, M. Raghuveer

引用次数: 2

The electrical properties of chemical vapor deposited silicon oxide films for applications as interlayer dielectrics in ULSI 化学气相沉积氧化硅薄膜的电学性能

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.634581

K.V. Loiko, V. Vassiliev, C. T. Chua, D. Lim

引用次数: 1

Threshold curves of the various modes of corona discharge in atmospheric air 大气中各种模式电晕放电的阈值曲线

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641149

P. Calva, F. Espino

引用次数: 1

A rapid test method for evaluating the tracking and erosion resistance of polymeric outdoor insulating materials 一种评价聚合室外绝缘材料的跟踪性和耐侵蚀性的快速试验方法

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI: 10.1109/CEIDP.1997.641096

R. Gorur, J. Montesinos, L. Varadadesikan, S. Simmons, M. Shah

引用次数: 14