{"title":"Fully automatic process control for vacuum resin casting systems","authors":"R. Bardtenschlager","doi":"10.1109/EEIC.2001.965739","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965739","url":null,"abstract":"For decades, the electric equipment and electronics industries are increasingly utilizing casting resins as substitutes for traditional insulating materials. The excellent insulating properties of vacuum-processed resins permits the manufacture of compact, light weight and maintenance free products. Casting resins are used for potting, encapsulating, molding, and for sealing of various types of components. The major types of curable casting resins include: epoxy, polyurethane, silicone, and polyester. These materials generate no by-products and cure free of voids. Highly abrasive filler materials in the resin and hardener components give excellent electrical and mechanical behavior, but also create difficulties for the life time of machine parts, and make a process control more complicated.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124279750","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}
{"title":"Applets and simulations in magnetics and electromagnetics","authors":"R. Vice, J. Masi","doi":"10.1109/EEIC.2001.965750","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965750","url":null,"abstract":"There is a need for visualization software to aid the student and practitioner in understanding some of the more difficult concepts in the study of magnetics and electromagnetics. As part of this effort, applets written in LabVIEW, JAVA, C++, and HTML were developed. The subjects range from electromagnetic propagation through hysteresis and rotating machines. Development of these applets and demonstration of the product are given and discussed. Demonstrations of these applets is possible by both Website delivery or standalone applications.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127232139","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}
{"title":"Calculation method for power transformer clamping rings made from laminated insulating materials","authors":"K. Biggie, T. Prevost","doi":"10.1109/EEIC.2001.965760","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965760","url":null,"abstract":"In core-form oil-filled power transformers, clamping rings are used to hold a clamping force on the windings. In this paper, data is presented from mechanical tests conducted on complete rings, using a custom-built test fixture, specifically designed to simulate the forces and conditions seen on clamping rings in power transformers. The tests were conducted on laminated wood and laminated pressboard rings, in sizes typically seen in medium power transformers. Mechanical equations that most closely apply to a ring under these loading conditions were determined, and flexural strength, modulus of elasticity and shear strength calculations were performed. A new method for calculating clamping ring thickness was determined, based on the test data. For laminated pressboard, the new calculation method was compared to a previous calculation method. A statistical interpretation of the values obtained using the new calculation method vs. the test results is presented.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122570780","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}
{"title":"High thermally conductive epoxy system for electrical and electronic thermal management","authors":"R. Kultzow","doi":"10.1109/EEIC.2001.965628","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965628","url":null,"abstract":"Formulated systems based on epoxy resins are used extensively in electrical and electronic applications as either casting systems or electronic encapsulants. Among the principal attributes that such products provide is to facilitate the transfer of thermal energy that is generated within such devices to that of a heat sink. In such applications, it is necessary that these types of devices operate in a defined temperature range where dielectric losses are minimal and mechanical properties, including those of strength and thermal shock resistance, are maintained. This paper describes an epoxy system that has been formulated with highly thermally conductive inorganic fillers that is ideally suited for applications requiring good thermal management. This heat curing system features a thermal conductivity up to 2.7 W/m-k together with a very low coefficient of thermal expansion (12 ppm/k at 20/spl deg/C). It can be easily processed at moderate temperatures with good working life but can be cured rapidly at higher temperatures to a tough thermally stable polymer with excellent electrical and mechanical properties.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129951433","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}
{"title":"Fuel cells: a burgeoning technology","authors":"F. Brown","doi":"10.1109/EEIC.2001.965743","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965743","url":null,"abstract":"The purpose of this paper is to make the reader aware of a technology that will affect our everyday lives in the manner that the Internet has affected us in the decade of the 1990s; that technology involves the fuel cell. The fuel cell will impact the energy industry as completely as the Internet has impacted the telecommunication industry. The fuel cell is based upon sound fundamental science and the technology to make it a commonplace energy source already exists. The impact of fuel cell technology will reshape the way we deal with energy and environmental issues. It will require a re-thinking of the way we design and implement new products and applications for many years to come.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127602989","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}
K. Younsi, D. Snopek, Joseph E. Hayward, P. Menard, J. C. Pellerin
{"title":"Seasonal changes in partial discharge activity on hydraulic generators","authors":"K. Younsi, D. Snopek, Joseph E. Hayward, P. Menard, J. C. Pellerin","doi":"10.1109/EEIC.2001.965723","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965723","url":null,"abstract":"Six hydraulic generators in two separate power stations were equipped with partial discharge cable type couplers for long term PD monitoring. The stator windings used four different insulation systems from three different manufacturers. Partial discharge activity was monitored monthly on each generator for periods of time ranging from 2 to 9 years. PD data was acquired in the frequency range of 40 to 350 MHz. External noise pulses were filtered out using the differential method with two cable couplers per phase. The present paper is a case study showing how PD activity varies dramatically depending on the time of the year the online testing was performed. A ratio higher than 100 was recorded between winter and summer readings. Winter readings, (January-March) were always higher than summer readings (July-September). A strong correlation was found between temperature, atmospheric absolute humidity levels (water partial pressure in mm Hg) and the well-known PD basic quantities such as Q/sub max/ and NQN values. An interpretation of the monthly-acquired data is offered based on both external and internal PD activity.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125736143","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}
{"title":"An operating cost comparison for impregnation systems","authors":"P. Caine","doi":"10.1109/EEIC.2001.965738","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965738","url":null,"abstract":"This past year, the United States and the West Coast in particular, have been reminded of how limited their natural resources are and how much they are relied upon. They experienced sharp increases in the price of natural gas and gasoline for automobiles. Brown outs occurred due to limited supplies of electric power around the country. As occurrences like this arise, we are reminded of our responsibility as engineers to design, build, and use manufacturing equipment as efficiently and effectively as possible.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125995696","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}
{"title":"Further excursions in computer aided magnetic devices","authors":"J. Masi","doi":"10.1109/EEIC.2001.965599","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965599","url":null,"abstract":"An understanding of the interchange between electrical and magnetic energy in electromechanical devices and systems is essential to the description of how solenoids (singly excited) and other (doubly-excited) electromechanical devices work. By utilizing conservation of energy principles, one can calculate the forces and the resultant motion for doubly-excited systems. This paper details the principle of co-energy as it applies to nonlinear systems. The program and results for actual devices are discussed.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134089811","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}
{"title":"Dielectric behaviour of insulating materials under liquid nitrogen","authors":"E. Husain, M. M. Mohsin, A. Masood, M. Zuberi","doi":"10.1109/EEIC.2001.965679","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965679","url":null,"abstract":"In practical HTSC devices, equipment and systems use of both LN/sub 2/ (liquid nitrogen) and CGN/sub 2/ (cryogenic nitrogen) is almost essential. Both LN/sub 2/ and CGN/sub 2/ are used not only as a coolant but also as an insulating material. In the present study an attempt has been made to study the dielectric behavior of solid insulating materials dipped in LN/sub 2/ as regards to change in loss index.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130997797","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}
{"title":"New insulation material and process for electric motor repair","authors":"C. A. Koffler","doi":"10.1109/EEIC.2001.965769","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965769","url":null,"abstract":"New materials are at engineers' disposal, which make electric motor rewinds easier and better than in the past. The material is stronger and has a higher density. In this paper, the author discusses Nomex Type 414, Nomex Type 411, FiberTek Res-I-Flex, Surge Rope and Thermaleze Wire, which are all excellent examples of products that provide for a more reliable repair. Using these products has helped to streamline the repair by eliminating steps of the repair process. For example, you do not have to use reinforcement tape on the edges to keep the slot papers from splitting. The wedges are also stronger allowing them to be pushed into the full slot without buckling. It is advantages such as these that encourage the use and continual development of new materials.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132815973","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}