Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162596
James F. B. Patterson
Novel methods of encapsulating coils using thermoplastics speed manufacturing and allow for multifunctional designs that eliminate parts and simplify assembly. The author reviews and reports on recent developments in materials, processing techniques, and applications in this area. With regard to applications. two new fields for thermoplastic encapsulation have opened up: automotive sensors and motor stators. Also, more and more solenoids and transformers are being encapsulated with thermoplastics. As for materials, nylon 6/12 and toughened PET extend the range of part design and processing possibilities. They are good complements to nylon 6,6 and standard grades of thermoplastic polyesters. Ongoing research and development in processing have expanded the knowledge of tooling designs and molding parameters that optimize product quality, extend the design horizon, and reduce the time and cost of developing new applications.<>
{"title":"Advances in thermoplastic coil encapsulation","authors":"James F. B. Patterson","doi":"10.1109/EEIC.1991.162596","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162596","url":null,"abstract":"Novel methods of encapsulating coils using thermoplastics speed manufacturing and allow for multifunctional designs that eliminate parts and simplify assembly. The author reviews and reports on recent developments in materials, processing techniques, and applications in this area. With regard to applications. two new fields for thermoplastic encapsulation have opened up: automotive sensors and motor stators. Also, more and more solenoids and transformers are being encapsulated with thermoplastics. As for materials, nylon 6/12 and toughened PET extend the range of part design and processing possibilities. They are good complements to nylon 6,6 and standard grades of thermoplastic polyesters. Ongoing research and development in processing have expanded the knowledge of tooling designs and molding parameters that optimize product quality, extend the design horizon, and reduce the time and cost of developing new applications.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"6 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114000699","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162605
M. Epstein
Summary form only given, as follows. The coming decade is expected to be a period of extensive advances in technology. This will have a profound impact on society as a whole but, in particular, on the electrical and electronics industries. The author provides an overview of some of the more interesting developments likely to reach the marketplace in some form before the end of the decade. Global subjects such as high-speed rail will be addressed along with more specialized subjects such as liquid crystal polymers and ferroelectrics.<>
{"title":"New technology for the 21st century","authors":"M. Epstein","doi":"10.1109/EEIC.1991.162605","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162605","url":null,"abstract":"Summary form only given, as follows. The coming decade is expected to be a period of extensive advances in technology. This will have a profound impact on society as a whole but, in particular, on the electrical and electronics industries. The author provides an overview of some of the more interesting developments likely to reach the marketplace in some form before the end of the decade. Global subjects such as high-speed rail will be addressed along with more specialized subjects such as liquid crystal polymers and ferroelectrics.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123815434","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162601
B. Robeson
The author points out why minimizing core losses is important to users of rewound motors. It is indicated that core testing is important because it leads to better customer service and can reduce a repair shop's warranty costs. Core permeability describes the relative ability of the motor core to support a strong magnetic field. Any reduction in core permeability means that more power will be required to produce the original magnetic field strength. This will cause the motor to draw higher no-load current, while negatively effecting both efficiency and power factor. The author seeks to create an awareness of the two most common core testing techniques and motivate the reader to learn more about more core testing.<>
{"title":"Core loss testing-essential for the 1990s","authors":"B. Robeson","doi":"10.1109/EEIC.1991.162601","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162601","url":null,"abstract":"The author points out why minimizing core losses is important to users of rewound motors. It is indicated that core testing is important because it leads to better customer service and can reduce a repair shop's warranty costs. Core permeability describes the relative ability of the motor core to support a strong magnetic field. Any reduction in core permeability means that more power will be required to produce the original magnetic field strength. This will cause the motor to draw higher no-load current, while negatively effecting both efficiency and power factor. The author seeks to create an awareness of the two most common core testing techniques and motivate the reader to learn more about more core testing.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131396852","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162576
P.J. Walitsky
It is projected that costs related to the Clean Air Act will increase in the short run as industry pushes for substitutions and begins applying control technology. However, competition in the pollution control industry and the development of novel techniques and process methods will contribute to making the control of air pollution feasible and economical. The electronics industry will be affected directly by many of the titles. These titles will affect what materials are used and how they are used. They establish a nationwide industry-specific system for emission of hazardous air pollutants. They phase out production of various solvents which have long been a mainstay of the electrical and electronics industries. It is concluded that the long-range effect of the Clean Air Act Amendments of 1990 should be cleaner air, cleaner cars, cleaner power plants, cleaner factories, and cleaner fuels.<>
{"title":"The effect of the Clean Air Act on the electrical/electronics industry","authors":"P.J. Walitsky","doi":"10.1109/EEIC.1991.162576","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162576","url":null,"abstract":"It is projected that costs related to the Clean Air Act will increase in the short run as industry pushes for substitutions and begins applying control technology. However, competition in the pollution control industry and the development of novel techniques and process methods will contribute to making the control of air pollution feasible and economical. The electronics industry will be affected directly by many of the titles. These titles will affect what materials are used and how they are used. They establish a nationwide industry-specific system for emission of hazardous air pollutants. They phase out production of various solvents which have long been a mainstay of the electrical and electronics industries. It is concluded that the long-range effect of the Clean Air Act Amendments of 1990 should be cleaner air, cleaner cars, cleaner power plants, cleaner factories, and cleaner fuels.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115348007","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162582
N. Hanssen
The author describes several test methods which may be used to evaluate powdered epoxy resins for their potential use as integral insulation on fractional horsepower motor iron. These are the edge coverage test method, the hot plate gel time test method, the glass pellet flow test method, and the steel panel impact test method. These test methods may be of value in establishing incoming quality control specifications, thus assuring that the epoxy resin manufacturer is supplying a product which is in compliance with the requirements specified by the motor manufacturer. Some of these tests may be used in motor production to ensure the epoxy is obtaining proper cure, that powder which meets minimum edge coverage requirements is being applied, or that the substrate being coated is free from contamination.<>
{"title":"Powdered epoxy resin test methods","authors":"N. Hanssen","doi":"10.1109/EEIC.1991.162582","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162582","url":null,"abstract":"The author describes several test methods which may be used to evaluate powdered epoxy resins for their potential use as integral insulation on fractional horsepower motor iron. These are the edge coverage test method, the hot plate gel time test method, the glass pellet flow test method, and the steel panel impact test method. These test methods may be of value in establishing incoming quality control specifications, thus assuring that the epoxy resin manufacturer is supplying a product which is in compliance with the requirements specified by the motor manufacturer. Some of these tests may be used in motor production to ensure the epoxy is obtaining proper cure, that powder which meets minimum edge coverage requirements is being applied, or that the substrate being coated is free from contamination.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115303702","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162590
K. Mathes
The history of electrical insulation from its origins to the present is briefly reviewed. In the 1800s the development of electrical apparatus made necessary the use of a variety of insulating materials to meet increasingly demanding needs. Up to about 1925 only naturally occurring products such as asphalt, rubber, mica, and cotton thread or fabric were generally used. When a plethora of synthetic insulating materials became available, both their use and the means for evaluating them became complex. Attention is given to examples of failures, with reference to cryogenics. sodium conductors, URD polyethylene cable, outdoor plastic insulators, and generator stator insulation.<>
{"title":"A brief history of development in electrical insulation","authors":"K. Mathes","doi":"10.1109/EEIC.1991.162590","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162590","url":null,"abstract":"The history of electrical insulation from its origins to the present is briefly reviewed. In the 1800s the development of electrical apparatus made necessary the use of a variety of insulating materials to meet increasingly demanding needs. Up to about 1925 only naturally occurring products such as asphalt, rubber, mica, and cotton thread or fabric were generally used. When a plethora of synthetic insulating materials became available, both their use and the means for evaluating them became complex. Attention is given to examples of failures, with reference to cryogenics. sodium conductors, URD polyethylene cable, outdoor plastic insulators, and generator stator insulation.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115425272","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162612
G. K. Mais
Casting and quality parameters which are directly related to the vacuum casting equipment are discussed. These include the degassing degree of the cast resin constituents, the casting mode and speed, the pre-evacuation time and vacuum before casting, and the viscosity and temperature of the cast resin compound. Casting and quality parameters that are not directly related to the vacuum casting equipment are also examined.<>
{"title":"Process parameters for the casting of quality products under vacuum","authors":"G. K. Mais","doi":"10.1109/EEIC.1991.162612","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162612","url":null,"abstract":"Casting and quality parameters which are directly related to the vacuum casting equipment are discussed. These include the degassing degree of the cast resin constituents, the casting mode and speed, the pre-evacuation time and vacuum before casting, and the viscosity and temperature of the cast resin compound. Casting and quality parameters that are not directly related to the vacuum casting equipment are also examined.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127185273","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162566
T. Churchill, J. Edmonds, C. Burns
Comprehensive rotor-mounted scanning of hydrogenerator stators has attained commercial status on the basis of prototype development and extensive beta-site testing on four generators and two pumped-storage units ranging in capacity from 22 to 450 MVA. Thermal, RFI, acoustic, air-gap, magnetic, and rotor vibration sensors are monitored in real-time to provide early warning of impending failures. Resulting data are continuously processed for alarm conditions, analyzed for anomalous technology, and archived for future trend assessment. This technology is now being extended to two and four-pole turbine-driven generators in which the environment is far more severe than in salient-pole hydro machines. The authors provide graphic results obtained using hydrogenerator scanners and describe techniques under development to achieve comparable results with turbogenerator scanners.<>
{"title":"Rotor-mounted scanning of stators in hydro and turbine-drive generators","authors":"T. Churchill, J. Edmonds, C. Burns","doi":"10.1109/EEIC.1991.162566","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162566","url":null,"abstract":"Comprehensive rotor-mounted scanning of hydrogenerator stators has attained commercial status on the basis of prototype development and extensive beta-site testing on four generators and two pumped-storage units ranging in capacity from 22 to 450 MVA. Thermal, RFI, acoustic, air-gap, magnetic, and rotor vibration sensors are monitored in real-time to provide early warning of impending failures. Resulting data are continuously processed for alarm conditions, analyzed for anomalous technology, and archived for future trend assessment. This technology is now being extended to two and four-pole turbine-driven generators in which the environment is far more severe than in salient-pole hydro machines. The authors provide graphic results obtained using hydrogenerator scanners and describe techniques under development to achieve comparable results with turbogenerator scanners.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126553528","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162561
L. Molloy, P. Eng.
The report summarizes the changes to the NEMA MW-1000 standard and the NEMA Magnet Wire Technical Committee activities since the 1989 E/EIC Conference. Activities completed, and those planned prior to the next issues of the standard, are discussed. Information on the ongoing activities that lead to continuous improvement of the MW-1000 document is presented.<>
{"title":"Chairman's report-NEMA Magnet Wire Technical Committee","authors":"L. Molloy, P. Eng.","doi":"10.1109/EEIC.1991.162561","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162561","url":null,"abstract":"The report summarizes the changes to the NEMA MW-1000 standard and the NEMA Magnet Wire Technical Committee activities since the 1989 E/EIC Conference. Activities completed, and those planned prior to the next issues of the standard, are discussed. Information on the ongoing activities that lead to continuous improvement of the MW-1000 document is presented.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124798026","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}
Pub Date : 1991-10-07DOI: 10.1109/EEIC.1991.162573
E. Walsh
It is pointed out that in today's regulatory environment, all materials and processes either under development or now in use will be subject to intense evaluation for environmental impact. Many current materials and processes may well have mandated changes. This is not limited to insulating materials, but will include even the most basic processes such as soldering, painting, parts punching, and cleaning. The list of affected manufacturing processes and materials is very extensive, and essentially no organization is too small to not be affected. Another area of major concern is that of reevaluating all current manufacturing processes. Mandated phase-out of ozone-depleting chemicals and reduction in wastes will provide exceptional challenges in the next decade. The author attempts to provide some suggestions as to where effort might be placed and how to benefit from the impending changes.<>
{"title":"The forthcoming forced revolution in manufacturing","authors":"E. Walsh","doi":"10.1109/EEIC.1991.162573","DOIUrl":"https://doi.org/10.1109/EEIC.1991.162573","url":null,"abstract":"It is pointed out that in today's regulatory environment, all materials and processes either under development or now in use will be subject to intense evaluation for environmental impact. Many current materials and processes may well have mandated changes. This is not limited to insulating materials, but will include even the most basic processes such as soldering, painting, parts punching, and cleaning. The list of affected manufacturing processes and materials is very extensive, and essentially no organization is too small to not be affected. Another area of major concern is that of reevaluating all current manufacturing processes. Mandated phase-out of ozone-depleting chemicals and reduction in wastes will provide exceptional challenges in the next decade. The author attempts to provide some suggestions as to where effort might be placed and how to benefit from the impending changes.<<ETX>>","PeriodicalId":367238,"journal":{"name":"[1991] Proceedings of the 20th Electrical Electronics Insulation Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124793772","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}
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