Pub Date : 1999-10-26DOI: 10.1109/EEIC.1999.826195
R. J. Beeckman
Inverter driven motors save energy and provide versatility to manufacturing and other processes. Drives allow relatively lower cost motors to run at variable speeds, but the higher voltage spikes generated by some drives have been linked to premature failure of otherwise reliable motors. Failure analyses of some of these motors have shown evidence of partial discharge damage. Motor manufacturers have scrutinized their manufacturing processes and materials to develop motors that are much more resistant to this type of failure mechanism. Magnet wire companies have developed products that are much more resistant to partial discharges, but some motors are still failing due to the continual bombardment of high voltage spikes generated by the switching devices in the drives. Much more data has been generated on corona inception and extinguish voltages in an effort to better understand the problem. This paper attempts to qualify and quantify some of the issues related to premature failure of motors running on IGBT drives. Benefits of using some different types of magnet wire insulation are explained. Specific data related to CIV vs. magnet wire insulation build are presented.
{"title":"Inverter drive issues and magnet wire responses","authors":"R. J. Beeckman","doi":"10.1109/EEIC.1999.826195","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826195","url":null,"abstract":"Inverter driven motors save energy and provide versatility to manufacturing and other processes. Drives allow relatively lower cost motors to run at variable speeds, but the higher voltage spikes generated by some drives have been linked to premature failure of otherwise reliable motors. Failure analyses of some of these motors have shown evidence of partial discharge damage. Motor manufacturers have scrutinized their manufacturing processes and materials to develop motors that are much more resistant to this type of failure mechanism. Magnet wire companies have developed products that are much more resistant to partial discharges, but some motors are still failing due to the continual bombardment of high voltage spikes generated by the switching devices in the drives. Much more data has been generated on corona inception and extinguish voltages in an effort to better understand the problem. This paper attempts to qualify and quantify some of the issues related to premature failure of motors running on IGBT drives. Benefits of using some different types of magnet wire insulation are explained. Specific data related to CIV vs. magnet wire insulation build are presented.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131627937","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826199
S. Darling
In North America most producers and users of magnet wire are very familiar with the standards which describe and specify the various types in use. However on a worldwide basis there is group of international standards which also encompass magnet wire or, as it is called under these standards, winding wire. Since international trade in magnet wire has rapidly expanded, it is import for producers and users to be aware of the existence and status of the relevant standards sanctioned and issued by the International Electrotechnical Commission (IEC). This paper endeavors to give the reader a basic awareness of such standards and, at the same time, tries to give the status of the relevant standards. Additionally, a correlation is given between these standards and the national standards covering magnet wire in North America which are developed by the National Electrical Manufacturers Association (NEMA). A final objective of this paper is to underscore the similarities found between the two and to describe some of the efforts being made to further harmonize those standards.
{"title":"1999 report on IEC winding wire activities","authors":"S. Darling","doi":"10.1109/EEIC.1999.826199","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826199","url":null,"abstract":"In North America most producers and users of magnet wire are very familiar with the standards which describe and specify the various types in use. However on a worldwide basis there is group of international standards which also encompass magnet wire or, as it is called under these standards, winding wire. Since international trade in magnet wire has rapidly expanded, it is import for producers and users to be aware of the existence and status of the relevant standards sanctioned and issued by the International Electrotechnical Commission (IEC). This paper endeavors to give the reader a basic awareness of such standards and, at the same time, tries to give the status of the relevant standards. Additionally, a correlation is given between these standards and the national standards covering magnet wire in North America which are developed by the National Electrical Manufacturers Association (NEMA). A final objective of this paper is to underscore the similarities found between the two and to describe some of the efforts being made to further harmonize those standards.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124950051","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826269
B. Carroll, D. Klug, L. Dimitrov, S. Marmara, R. Montemayor, A. Schaffer, P. Shaub, E. Tse, M. Thompson
The design of a DC motor speed controller for application in a lightweight electric vehicle is discussed. The focus is on the design of the power electronics stage and the microcontroller-based digital control system to provide safe and reliable operation.
{"title":"Design of a motor speed controller for a lightweight electric vehicle","authors":"B. Carroll, D. Klug, L. Dimitrov, S. Marmara, R. Montemayor, A. Schaffer, P. Shaub, E. Tse, M. Thompson","doi":"10.1109/EEIC.1999.826269","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826269","url":null,"abstract":"The design of a DC motor speed controller for application in a lightweight electric vehicle is discussed. The focus is on the design of the power electronics stage and the microcontroller-based digital control system to provide safe and reliable operation.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116041710","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826295
Weilong Cai
This paper discusses the properties of soft ferrites from the view points of physics. The discussion can be used as a guide to the design for ferrite users.
本文从物理学的角度讨论了软铁氧体的性质。对铁氧体用户的设计有一定的指导意义。
{"title":"The physics of soft ferrite","authors":"Weilong Cai","doi":"10.1109/EEIC.1999.826295","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826295","url":null,"abstract":"This paper discusses the properties of soft ferrites from the view points of physics. The discussion can be used as a guide to the design for ferrite users.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126866607","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826262
N. Kolev, E. Gadjeva, M. Danikas, N.R. Gourov
Partial discharge represents a physical phenomenon, in which discharges are involved in electrically weak regions of solid insulation materials (most often gaseous or liquid inclusions). They cause damage of the insulation and often start from the voids enclosed in it and/or at interface defects. The time, during which technical insulation is still in good operation condition, is of great practical interest. The same is valid for effects of partial discharge resulting in failure of the dielectric much before the expected life-time. For this reason this topic is subjected to many investigations. The present paper treats discharge phenomena inside enclosed cylindrical cavities. An electrical model has been developed for the tested dielectric. The model has been built using the tools of OrCAD's PSpice software for analogue design and simulation. Experimental results have been compared with the model data. The experimental data obtained from testing of polyethylene samples with artificially created cylindrical voids have been used for this comparison. The electrode configuration used is plane-plane, and the electrodes are parallel to the ends of the cylindrical void. The parameters of the electrical model have been calculated by means of data taken from the experimental set-up used.
{"title":"An approach to develop a partial discharge investigation","authors":"N. Kolev, E. Gadjeva, M. Danikas, N.R. Gourov","doi":"10.1109/EEIC.1999.826262","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826262","url":null,"abstract":"Partial discharge represents a physical phenomenon, in which discharges are involved in electrically weak regions of solid insulation materials (most often gaseous or liquid inclusions). They cause damage of the insulation and often start from the voids enclosed in it and/or at interface defects. The time, during which technical insulation is still in good operation condition, is of great practical interest. The same is valid for effects of partial discharge resulting in failure of the dielectric much before the expected life-time. For this reason this topic is subjected to many investigations. The present paper treats discharge phenomena inside enclosed cylindrical cavities. An electrical model has been developed for the tested dielectric. The model has been built using the tools of OrCAD's PSpice software for analogue design and simulation. Experimental results have been compared with the model data. The experimental data obtained from testing of polyethylene samples with artificially created cylindrical voids have been used for this comparison. The electrode configuration used is plane-plane, and the electrodes are parallel to the ends of the cylindrical void. The parameters of the electrical model have been calculated by means of data taken from the experimental set-up used.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127173023","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826280
J. Timperley
It can be expected that a hydrogenerator stator winding may require replacement when a machine is upgraded more than 25%. A case study is presented where detailed thermal and electrical analysis was performed on spare stator coils purchased when the stator winding of a 158 MVA machine was last rewound in 1988. Results of these accelerated aging tests indicated that continued safe operation of the existing ten-year-old stator coils with an expected turbine upgrade of 27% was possible. Capability tests conducted since the upgrade indicate temperature limitations for the existing insulation system will not be exceeded during normal operation at 200 MVA. Results of thermal and electrical aging tests are presented.
{"title":"Generator upgrade without stator rewinding","authors":"J. Timperley","doi":"10.1109/EEIC.1999.826280","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826280","url":null,"abstract":"It can be expected that a hydrogenerator stator winding may require replacement when a machine is upgraded more than 25%. A case study is presented where detailed thermal and electrical analysis was performed on spare stator coils purchased when the stator winding of a 158 MVA machine was last rewound in 1988. Results of these accelerated aging tests indicated that continued safe operation of the existing ten-year-old stator coils with an expected turbine upgrade of 27% was possible. Capability tests conducted since the upgrade indicate temperature limitations for the existing insulation system will not be exceeded during normal operation at 200 MVA. Results of thermal and electrical aging tests are presented.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126099738","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826171
S. Reimann
One of the most important tasks in the overhaul and repair of electrical machinery, such as motors and generators, is balancing of the armature or rotor. There are several aspects of the balancing process for such components that make this task for service shops more difficult than that of the original manufacturer. These issues are a function of unbalance tolerance; unbalance correction method; and balancing equipment.
{"title":"Balancing considerations for the repair of large electric machines","authors":"S. Reimann","doi":"10.1109/EEIC.1999.826171","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826171","url":null,"abstract":"One of the most important tasks in the overhaul and repair of electrical machinery, such as motors and generators, is balancing of the armature or rotor. There are several aspects of the balancing process for such components that make this task for service shops more difficult than that of the original manufacturer. These issues are a function of unbalance tolerance; unbalance correction method; and balancing equipment.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128565886","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826239
A. Yeadon, A. E. Miller, W. Yeadon
This paper identifies and describes the types of design tools available to motor designers. It contrasts modern methods with previous methods and determines that the modern computer's ability to handle large matrices improves prediction of motor performance.
{"title":"Advances in electric motor design tools","authors":"A. Yeadon, A. E. Miller, W. Yeadon","doi":"10.1109/EEIC.1999.826239","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826239","url":null,"abstract":"This paper identifies and describes the types of design tools available to motor designers. It contrasts modern methods with previous methods and determines that the modern computer's ability to handle large matrices improves prediction of motor performance.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126436502","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826237
B. Moore, R. Rehder, R. E. Draper
In the last decade, significant technology advancements have dramatically altered approaches to electrical insulation development. This revolution came about with the discovery and patenting in the 1980s, of the use of inorganic fillers to enhance the electrical properties of insulating materials. The first commercial introduction was to increase the corona resistance of enamelled wire, a product used for many years as strand and turn insulation in the manufacture of electrical motors and generators. More recently, the concepts surrounding the advantages of corona resistance have migrated to insulating composites. This paper reviews the developments of one manufacturer, in introducing corona resistant insulation systems to vertical generators, the benefits accrued, and the preliminary introduction of these concepts into the large motor arena.
{"title":"Utilizing reduced build concepts in the development of insulation systems for large motors","authors":"B. Moore, R. Rehder, R. E. Draper","doi":"10.1109/EEIC.1999.826237","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826237","url":null,"abstract":"In the last decade, significant technology advancements have dramatically altered approaches to electrical insulation development. This revolution came about with the discovery and patenting in the 1980s, of the use of inorganic fillers to enhance the electrical properties of insulating materials. The first commercial introduction was to increase the corona resistance of enamelled wire, a product used for many years as strand and turn insulation in the manufacture of electrical motors and generators. More recently, the concepts surrounding the advantages of corona resistance have migrated to insulating composites. This paper reviews the developments of one manufacturer, in introducing corona resistant insulation systems to vertical generators, the benefits accrued, and the preliminary introduction of these concepts into the large motor arena.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130698362","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 : 1999-10-26DOI: 10.1109/EEIC.1999.826279
M. Wichmann, T. D. Boyer, T.J. Brogla
This paper explains a relatively simple methodology for estimating the cost of injection molded parts and provide open access to a Microsoft(R) Excel workbook of spreadsheets which utilizes this methodology. The open architecture of the workbook allows part designers to understand the assumptions and sensitivities defining their parts cost. By providing a simple estimating tool to designers in industries that are not heavily penetrated by thermoplastic material usage, it is believed that better thermoplastic applications may be achieved.
{"title":"A simple plastic part cost estimator using Microsoft(R) Excel","authors":"M. Wichmann, T. D. Boyer, T.J. Brogla","doi":"10.1109/EEIC.1999.826279","DOIUrl":"https://doi.org/10.1109/EEIC.1999.826279","url":null,"abstract":"This paper explains a relatively simple methodology for estimating the cost of injection molded parts and provide open access to a Microsoft(R) Excel workbook of spreadsheets which utilizes this methodology. The open architecture of the workbook allows part designers to understand the assumptions and sensitivities defining their parts cost. By providing a simple estimating tool to designers in industries that are not heavily penetrated by thermoplastic material usage, it is believed that better thermoplastic applications may be achieved.","PeriodicalId":415071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035)","volume":"1 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132068881","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：