Pub Date : 1985-09-01DOI: 10.1109/EIC.1985.7458594
A. Soysal, M. Sarioǧlu
Switching operations cause high frequency oscillations in power supply networks. During thes oscillations, transformer windings are subject to voltage stresses. For the analysis of such transient phenomena, lumped networks consisting of R, L, C parameters calculated from the geometric dimensions of transformer windings have been used. In this paper, a new method is described for modelling of transformer windings by their terminal impedance characteristics. It is shown that, by the use of the given models the transient oscillations occuring on the transformer windings can be examined through the state equations. Examples are given for a reduced scale model transformer and an industrial supply system.
{"title":"A synthetic method for modelling transformer windings in the study of system switching transients","authors":"A. Soysal, M. Sarioǧlu","doi":"10.1109/EIC.1985.7458594","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458594","url":null,"abstract":"Switching operations cause high frequency oscillations in power supply networks. During thes oscillations, transformer windings are subject to voltage stresses. For the analysis of such transient phenomena, lumped networks consisting of R, L, C parameters calculated from the geometric dimensions of transformer windings have been used. In this paper, a new method is described for modelling of transformer windings by their terminal impedance characteristics. It is shown that, by the use of the given models the transient oscillations occuring on the transformer windings can be examined through the state equations. Examples are given for a reduced scale model transformer and an industrial supply system.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"130 40","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113939951","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458644
Henry Dreisilker
New technology in electric motor repair. For the last fifty years, the technology for electric motor repair in the united States has remained virtually unchanged. Nearly all of the electric motor repair companies have been and still are using the same machines and methods that were used when motors first came into existence. These methods have proven to be outdated, wasteful, time consuming and, in most instances, damaging to the electric motor laminations. In the last sixteen years, new technology has given birth to a whole new method of repairing electric motors.
{"title":"Safe stator and rotor stripping method","authors":"Henry Dreisilker","doi":"10.1109/EIC.1985.7458644","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458644","url":null,"abstract":"New technology in electric motor repair. For the last fifty years, the technology for electric motor repair in the united States has remained virtually unchanged. Nearly all of the electric motor repair companies have been and still are using the same machines and methods that were used when motors first came into existence. These methods have proven to be outdated, wasteful, time consuming and, in most instances, damaging to the electric motor laminations. In the last sixteen years, new technology has given birth to a whole new method of repairing electric motors.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130469193","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458610
Maurice Ferne
Pumps and fans have been produced using a Class 180°C thermosetting, bondable magnet wire. The insulated magnet wire has good flexibility and meets the requirements of high speed winding equipment. The bondable magnet wire is also being examined for electrical brake and hermetic applications. The new bondcoat is superior to previous systems with respect to bonding and resoftening temperatures, chemical resistance and mechanical properties. The laboratory and field results obtained verify the unique properties of the coated wire and manufactured units. A movie has been made depicting the use of the new bondable magnet wire in a factory producing fans.
{"title":"Class 180°C, thermosetting, bondable magnet wire","authors":"Maurice Ferne","doi":"10.1109/EIC.1985.7458610","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458610","url":null,"abstract":"Pumps and fans have been produced using a Class 180°C thermosetting, bondable magnet wire. The insulated magnet wire has good flexibility and meets the requirements of high speed winding equipment. The bondable magnet wire is also being examined for electrical brake and hermetic applications. The new bondcoat is superior to previous systems with respect to bonding and resoftening temperatures, chemical resistance and mechanical properties. The laboratory and field results obtained verify the unique properties of the coated wire and manufactured units. A movie has been made depicting the use of the new bondable magnet wire in a factory producing fans.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"5 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133268893","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458606
George A. Walrath
In studying two different tests to determine a “common” property, several factors must be factored in. These not only include reliability of data, ease of duplication, and the other factors associated with data generation, but also include the cost per test, cost of initial equipment, and the time it takes to obtain quality results.
{"title":"Deternining the cure of film coated magnet wire","authors":"George A. Walrath","doi":"10.1109/EIC.1985.7458606","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458606","url":null,"abstract":"In studying two different tests to determine a “common” property, several factors must be factored in. These not only include reliability of data, ease of duplication, and the other factors associated with data generation, but also include the cost per test, cost of initial equipment, and the time it takes to obtain quality results.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133454534","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458590
X. Bertsch, A. Dubois
Although 25 % of all major fires are caused by electrical equipment, only a very small percentage can be attributed directly to the cables. They can, and do, overheat when subjected to current overloads or system failures, but adequate circuit protection ensures that only very few fires are started in this way.
{"title":"New mica paper insulation for fire resistant cables","authors":"X. Bertsch, A. Dubois","doi":"10.1109/EIC.1985.7458590","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458590","url":null,"abstract":"Although 25 % of all major fires are caused by electrical equipment, only a very small percentage can be attributed directly to the cables. They can, and do, overheat when subjected to current overloads or system failures, but adequate circuit protection ensures that only very few fires are started in this way.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130287910","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458627
K. Schoch, A. Bennett
The resistivity of several metal-filled adhesives was followed over a frequency range of 1 KHz to 10 MHz. The resistivity of the cured resins increased according to the filler in the order: Ag < Cu < Ni. The resistivity of most of the materials were independent of frequency over the range investigated. The exceptions were the two least conductive materials which decreased in resistivity between 1 MHz and 10 MHz. In addition, the shear strenghts of the adhesives were measured according to ASTM Dl002 on copper surfaces.
在1 KHz至10 MHz的频率范围内跟踪几种金属填充胶粘剂的电阻率。固化树脂的电阻率随填料的加入而增大，其顺序为Ag < Cu < Ni。在研究范围内，大多数材料的电阻率与频率无关。例外的是两种导电性最低的材料，其电阻率在1 MHz和10 MHz之间下降。此外，根据ASTM Dl002标准测定了胶粘剂在铜表面的剪切强度。
{"title":"Electrical evaluation of conductive adhesives","authors":"K. Schoch, A. Bennett","doi":"10.1109/EIC.1985.7458627","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458627","url":null,"abstract":"The resistivity of several metal-filled adhesives was followed over a frequency range of 1 KHz to 10 MHz. The resistivity of the cured resins increased according to the filler in the order: Ag < Cu < Ni. The resistivity of most of the materials were independent of frequency over the range investigated. The exceptions were the two least conductive materials which decreased in resistivity between 1 MHz and 10 MHz. In addition, the shear strenghts of the adhesives were measured according to ASTM Dl002 on copper surfaces.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133594222","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458595
M. Bohlmann
Five major classes of permanent magnet materials are available for engineered devices. The magnetic and other physical properties of appropriate subgrades are listed for applications. Hard ferrite and samarium-cobalt magnets are compared to the newest and, in some ways, the best material in production today—the neodymium/iron/boron. The magnetic and physical properties, availability and relative costs of appropriate subgrades are presented. High coercivity SM2TM17 performs better at elevated temperature than SmCo5 or Nd-Fe-B—performance is generally improved by designing with higher operating slope in the magnet application.
可用于工程设备的永磁材料主要有五类。列出了适当路基的磁性和其他物理性质，以供应用。硬铁氧体和钐钴磁铁与最新的、在某些方面也是当今生产中最好的材料——钕/铁/硼——相比较。介绍了适当路基的磁性和物理性质、可得性和相对成本。高矫顽力SM2TM17在高温下的性能优于SmCo5或nd - fe - b，在磁体应用中通常通过设计更高的工作斜率来提高性能。
{"title":"Available and new permanent magnet materials","authors":"M. Bohlmann","doi":"10.1109/EIC.1985.7458595","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458595","url":null,"abstract":"Five major classes of permanent magnet materials are available for engineered devices. The magnetic and other physical properties of appropriate subgrades are listed for applications. Hard ferrite and samarium-cobalt magnets are compared to the newest and, in some ways, the best material in production today—the neodymium/iron/boron. The magnetic and physical properties, availability and relative costs of appropriate subgrades are presented. High coercivity SM2TM17 performs better at elevated temperature than SmCo5 or Nd-Fe-B—performance is generally improved by designing with higher operating slope in the magnet application.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114730303","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458615
C. Ho, H. H. Li, N. Singh
A computerized data base on dielectric materials has been established at the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) of Purdue University under the sponsorship of the Electric Power Research Institute (EPRI). This is a comprehensive, on-line, interactive, menu-driven, user-friendly, intelligent data base. It provides commercial and applications data as well as material property data and other technical data. This data base is continuously being expanded and updated so that it will eventually contain all the available reliable important data and information on all important dielectric liquids, gases, solids, and combinations and composites thereof. The development, operation, function, scope, contents, and other features of this data base are presented and discussed.
{"title":"Establishment of a computerized comprehensive on-line intelligent data base on dielectric materials","authors":"C. Ho, H. H. Li, N. Singh","doi":"10.1109/EIC.1985.7458615","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458615","url":null,"abstract":"A computerized data base on dielectric materials has been established at the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) of Purdue University under the sponsorship of the Electric Power Research Institute (EPRI). This is a comprehensive, on-line, interactive, menu-driven, user-friendly, intelligent data base. It provides commercial and applications data as well as material property data and other technical data. This data base is continuously being expanded and updated so that it will eventually contain all the available reliable important data and information on all important dielectric liquids, gases, solids, and combinations and composites thereof. The development, operation, function, scope, contents, and other features of this data base are presented and discussed.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"32 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132335007","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458569
K. Cornick
The characteristics of steep-fronted voltage transients generated by switching operations in cable connected motor systems are described. It is shown that such transients produce severe interturn insulation stresses in machine windings. Factors which need consideration when drafting the necessary test standards for ensuring that interturn insulation will withstand such severe stresses are discussed. Techniques necessary for the correct implementation of such standards are explained. Results of interturn insulation tests on the coils of a large induction motor are presented and it is shown that steep-fronted transients voltage tests may be readily carried out if due care is taken in the test procedure.
{"title":"Steep-fronted impulse voltage testing of machine stator coils","authors":"K. Cornick","doi":"10.1109/EIC.1985.7458569","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458569","url":null,"abstract":"The characteristics of steep-fronted voltage transients generated by switching operations in cable connected motor systems are described. It is shown that such transients produce severe interturn insulation stresses in machine windings. Factors which need consideration when drafting the necessary test standards for ensuring that interturn insulation will withstand such severe stresses are discussed. Techniques necessary for the correct implementation of such standards are explained. Results of interturn insulation tests on the coils of a large induction motor are presented and it is shown that steep-fronted transients voltage tests may be readily carried out if due care is taken in the test procedure.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132415022","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458638
R. Gandhi
In the early period of copper wire drawing, an intermediate annual was routinely performed to relieve stresses in the hard drawn wire. The annealing of copper “breakdown” wire helped make the subsequent drawing operation easier and with a minimum of wire breaks.
{"title":"Effect of intermediate anneal on magnet wire properties of copper wire","authors":"R. Gandhi","doi":"10.1109/EIC.1985.7458638","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458638","url":null,"abstract":"In the early period of copper wire drawing, an intermediate annual was routinely performed to relieve stresses in the hard drawn wire. The annealing of copper “breakdown” wire helped make the subsequent drawing operation easier and with a minimum of wire breaks.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128788958","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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