Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)最新文献

{"title":"Age estimation of cellulose paper insulation in power transformers using ANN","authors":"J.S. Navamany, P. Ghosh","doi":"10.1109/EICEMC.2003.1247897","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247897","url":null,"abstract":"The useful functional life of a power transformer is determined by the life of the paper insulation. Therefore researches on cellulosic paper degradation in power transformers are primarily directed towards the development of a mathematical model to estimate the age of the cellulose paper insulation based on the concentration of dissolved gases and furanic compounds. In this research work, a utility field study has been carried out on selected transmission power transformers with a wide range of ages. Samples of oil collected from the identified transformers were tested for concentration levels of CO and CO/sub 2/ and furan derivatives 2-furfural. The results of the concentration of the above mentioned parameters clearly show that there is a dependence on age. Therefore, in this paper an attempt has been made to model the age(T) of the cellulose paper insulation in terms of the concentration of CO, CO/sub 2/ and 2-furfural that T=f (CO, CO/sub 2/, 2-furfural). The present modelling has been done using Artificial Neural Network(ANN). The estimated results using the proposed ANN model are further compared with the measured data collected during the field study and has shown a good correlation.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"07 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127401098","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":"How to achieve lower tolerances in production balancing machines","authors":"D. Thelen, W. Burkert","doi":"10.1109/EICEMC.2003.1247907","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247907","url":null,"abstract":"The ever increasing demands regarding reduction of noise, vibration and harshness (NVH) of machinery, power tools, household devices and rotating components in automotive applications require improved balancing accuracy and reduced balancing tolerances, among other manufacturing and design criteria, like reduction of audible bearing noise or air borne noise. This is true for rotors in various industrial applications like turbo machinery, and especially important for small armature electric motors, used in automotive applications. NVH requirements in the automotive industry are pushing the limits of technology. In recognising this need, we realized new technology and new techniques needed to be developed.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114600021","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":"Conducting quality audits in offshore motor component factories","authors":"M. Bloom","doi":"10.1109/EICEMC.2003.1247906","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247906","url":null,"abstract":"This paper presents a practical hands-on approach to conducting the audit beginning with the first handshakes through parting words. Offshore Solutions has over 12 years of experience in performing these on-site audits and shares its experience starting with preparation for the audit. Topics covered include the pre-audit on-site meeting, how to select participants, how to determine the best order for moving from process to process, how to analyze the robustness of each process, and how to avoid being fooled by undocumented statements.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129966122","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":"Factory measurement system for sub Pico Coulomb partial discharge signal","authors":"YongJun Kim, D. Kang, D. Hwang, I. Haiduc","doi":"10.1109/EICEMC.2003.1247909","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247909","url":null,"abstract":"For the evaluation of insulation condition, it has been found that the higher sensitivity of partial discharge measurement must be achieved during the factory test. Generally, partial discharge measurement of less than few Pico Coulombs can be performed in a shield room. However, it is not an economical solution for manufacturers to provide the shield room at their own factories due to the high installation cost and the space allocation. In the paper, the economical system for partial discharge measurement of sub Pico Coulomb level will be explained in detail.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"350 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113982827","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":"Coil termination technology - an overview of the various methods available","authors":"B. Brunt","doi":"10.1109/EICEMC.2003.1247941","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247941","url":null,"abstract":"One of the more important processes in coil winding is the connection of the magnet wire to the terminal pins. There are several means available to achieve this and the purpose of this article is to examine these methods and to look at the design considerations that apply to each.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121302170","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":"Sensing surface phase transitions on fullerene C/sub 60/ nanospheres in water-methanol mixture","authors":"M. El-Ashry, M. Amer, J. Maguire","doi":"10.1109/EICEMC.2003.1247935","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247935","url":null,"abstract":"This paper reports the results of a study of adsorption of small molecules on the surface of buckminsterfullerene, C60 and on single walled carbon nanotubes (SWNT). The pressure dependence of the Raman spectrum was investigated over the range 0-100 kbar in methanol-water mixtures that were used as the pressure-transmitting-fluid (PTF) in a diamond anvil cell. It is found that the spectral shift and its pressure derivative are sensitive to both the applied pressure and to the composition of the PTF. These observations are consistent with an explanation that involves preferential adsorption onto the surface of the C/sub 60/. In particular, the notion of C60 collapse need not be invoked to explain the observations.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129029011","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 dielectric performance stator winding insulation system for global VPI'ed air cooled generators","authors":"F. Emery","doi":"10.1109/EICEMC.2003.1247957","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247957","url":null,"abstract":"Stator winding insulation system for modern global vacuum impregnated (VPI'ed) air cooled generators are designed to perform under high electrical, mechanical, and thermal stress. Each component of insulation that goes into the fabrication of the stator coil is selected and tested to a very high standard so the stator winding will withstand these stresses over it's intended lifetime. Operation of the stator winding in an air environment means the stator coil design must meet a very high standard of dielectric requirements. With the movement to increasing the power density of air-cooled generators, it has become more critical to be sure the design constraints are met in the stator coil design. Stator coil insulation stress factors are well known and for the most part understood and are taken into account when designing global VPI'ed air cooled generator stator windings. In addition to selection of the best available coil materials, special design considerations are incorporated into the stator coil to reduce internal and external coil corona. Significant advances have been made in the testing and analysis of coil materials prior to their use to ensure the coils are fabricated using the correct materials and to ensure the materials meet their original design parameters. In addition to the use of high performance coil materials and special design features, the global vacuum-pressure-impregnation equipment and process control are critical factors to insure the winding meets the stress factor demands. To verify final stator fabrication, impregnation, and proper cure, final testing of the completed stator winding includes power factor testing, corona inception testing and the standard AC high potential testing. This paper presents the major features of the stator insulation system used in the modern global VPI'ed air cooled generators and what measures are taken to be certain the completed stator winding will meet the high demands placed on it during generator operation.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"721 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116988637","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":"Tension control during the coil winding process","authors":"T. Manning","doi":"10.1109/EICEMC.2003.1247942","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247942","url":null,"abstract":"The quality and performance of any manufactured part depends on the manufacturing process as well as the materials used. The mishandling of the best materials can reduce the performance and quality of a product. In the coil manufacturing process or when making wire wound products one of the most important factors affecting quality is tension. Tension devices are used to add tension and maintain precise tension control while accommodating and compensating for the conditions experienced by the magnet wire. To produce the best quality coils in high volume requires precise, consistent and reliable tension control.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116175634","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":"The role of AC & DC hipot testing in stator winding ageing","authors":"H. Sedding, R. Schwabe, D. Levin, J. Stein, B. Gupta","doi":"10.1109/EICEMC.2003.1247927","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247927","url":null,"abstract":"A recent EPRI survey on practices associated with the use of AC and DC hipot testing for maintenance purposes on rotating machines indicated that some in the utility industry were concerned that the hipot, or repeated applications thereof, may cause ageing of the stator insulation. Consequently, a study of this issue was performed using a failed hydraulic generator stator winding. AC and DC hipots were systematically applied to several bar groups followed by breakdown testing using AC potential. The results of the test program including their implications will be discussed in the proposed contribution.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126605573","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":"Impulse withstand voltage characteristics of polluted insulation material surfaces under humid conditions","authors":"K. Ermeler, W. Pfeiffer","doi":"10.1109/EICEMC.2003.1247845","DOIUrl":"https://doi.org/10.1109/EICEMC.2003.1247845","url":null,"abstract":"Recent research is indicating, that the impulse withstand voltage characteristics of insulation material surfaces are influenced by the relative humidity in a greatly differing extent. This influence mainly depends on the physical and chemical surface structure of insulation materials. In order to describe the impulse withstand voltage characteristics under humid conditions a test procedure called \"Water Adsorption Test\" has been introduced, which allows to classify various insulation materials into so-called water adsorption groups. The water adsorption test is based on a procedure to be performed on new test specimen. Previous papers have demonstrated numerous test results on different materials as epoxy resin, polyester resin and a laminate consisting of presspan and polyester foil. One of these papers has shown, that the water adsorption test is also suitable to determine the insulating properties of photodegraded test samples under humid conditions. The aim of the present paper is to find out, if the water adsorption test is suitable to describe the impulse withstand characteristics of naturally polluted insulation materials under humid conditions; hereby, the pollution layer consists of dust, soot and acids caused by exhaust fumes. For this purpose the water adsorption test has been performed on insulation materials, which had been exposed to indoor and outdoor conditions for several months. The present investigations have been carried out on two different glass fibre reinforced resins (epoxy resin and polyester resin). We obtained the result, that pollution does not lead to a degradation of the impulse withstand voltage characteristics under humid conditions in any case. Furthermore we found out, that the water adsorption test is not applicable in the presence of a pollution layer as dust or soot.","PeriodicalId":274147,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Technology Conference (Cat. No.03CH37480)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126115454","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}