Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)最新文献

{"title":"Analysis of a two phase brushless motor used in a CPU cooling fan","authors":"B. K. Fussell","doi":"10.1109/EEIC.2001.965692","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965692","url":null,"abstract":"Cooling fans for PC microprocessors often use two phase brushless motors to reduce electrical noise and to extend fan life. They are made with the winding on the inside of the motor (stator), and the magnet on the outside (rotor). This paper describes the analysis of an existing motor using a lumped parameter model. The flux paths are described and a circuit model is developed. From this model, startup and running torque are derived using the change in magnetic energy with angle. The derived torque is then compared to experimental measurements.","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":"115567654","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":"Why test magnet wire?","authors":"J. A. Whitney, R. B. Duke","doi":"10.1109/EEIC.2001.965627","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965627","url":null,"abstract":"The customer's perception of the quality of a product is vital to a company's success. Failing to reject unsatisfactory products which leads to failures in the field may damage the company's reputation causing sales to suffer even though after incurring the expense of replacing the unsatisfactory products. Even though present day magnet wire is an excellent product, some product rejections may be caused by deficiencies in the magnet wire they contain. Therefore, both the quality and cost of the product may be improved by testing the wire. Improving the quality of the product, while at the same time reducing its cost, is an unbeatable combination. Only those magnet wire users who test the wire prior to incorporating it into their products are able to assure themselves that it is satisfactory and reject that which is not. Those who do not test the wire may discover problems later, or have their customers discover them as deficiencies in their finished products. The use of in-line test equipment that gives instant feedback would make the manufacturer immediately aware of bad wire, permitting them to take direct action to correct the problem and avoid producing more scrap. The types of test to be carried out are mechanical, electrical and chemical.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"12 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":"128914602","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":"Comparative measurements of two partial discharge measurements used for form wound coils/bars as quality assurance tests","authors":"S. Cherukupalli, G. Halldorson, C. Tan","doi":"10.1109/EEIC.2001.965755","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965755","url":null,"abstract":"Several utilities both in Canada and in the USA have been using commercial on-line partial discharge (PD) systems as on-line monitoring tools. Partial discharge tests have been used historically to characterize bars/coils that have been sent to Powertech Laboratories for voltage endurance and thermal cycling tests so that the bars that displayed the highest PD quantities were subjected to voltage endurance tests. Utilities are now beginning to specify the limits for PD magnitudes and other related PD quantities as a quality assurance measure in their technical specifications for large motors and hydrogenerators. There appears to be confusion as to what are the reasonable limits for these quantities and whether or not these limits make practical sense. Since Powertech has had the unique opportunity to examine several insulation designs over the last decade this paper is an early attempt to document the current levels of PD quantities that are being measured on bars/coils being manufactured with modern insulation systems. No attempt has been made to correlate these quantities with its performance on voltage endurance (VE) test times but this work is ongoing. Several bars from different manufacturers were subjected to PD measurements at their normal line-to-ground voltage. These PD measurements were made using Powertech's classical PD system as well as a commercial system. One significant difference was that the PHA system uses pico-coulomb to represent charge magnitude while PDA system uses millivolt. Laboratory calibration was done to correlate these discharge magnitudes. Results showed that if the discharge magnitudes and the number of PD pulses were small both the classical and the commercial system gave similar PD responses. On the other hand if the discharge rate (number of pulses per second) was large the classical PD measurement system tended to saturate. Historically, when such saturation occurred during measurements with the classical PD system, measurements were repeated at a lower test voltage (for example 0.8 pu). Subsequent dissections of samples that exhibited such high PD showed the presence of a large number of voids in the groundwall insulation.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"68 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":"131052830","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":"ransformer insulation diagnosis: recovery voltage measurement and DC absorption test","authors":"A.A. Paithankar, C. Pinto","doi":"10.1109/EEIC.2001.965764","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965764","url":null,"abstract":"The primary motivation in insulation diagnostic study is to understand the exact state of insulation. Traditional methods using insulation resistance measurements, polarization index measurements and capacitance, tan delta measurements serve as good quality assurance criterion of acceptable values. However, for obtaining a more clear and focussed information on insulation health, newer testing and analytical techniques have to be adapted. This paper discusses two such methodologies. Recovery voltage measurement (RVM) is a technique based on measurement of increase of voltage across the transformer insulation after a charge-discharge cycle. This method yields key insulation parameters like moisture content and temperature withstand capability. A full cycle of recovery voltage measurement often requires a large amount of time. The DC absorption test aims at finding similar information as in the case of RVM with simple instrumentation and in a lesser amount of time. This paper describes the technique of RVM and later explores the possibility of using the DC absorption test for determination of health of transformer insulation. Experimental results to support the contention have also been included.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"56 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":"132523120","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":"Organic magnetic materials: preparation and properties","authors":"D. Tharaldson, J. Masi","doi":"10.1109/EEIC.2001.965749","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965749","url":null,"abstract":"The fabrication of high-speed, high permeability magnetic materials with low loss tangents are essential to the future of telecommunications and other high frequency applications. Using certain organic materials, heretofore considered insulators, with regions of the molecule acting as receptors for ferromagnetic ions, one can fabricate these materials using processable polymers. Processes for fabricating these materials and results obtained are given in this paper. Results are discussed and alternative processes are suggested.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"55 5 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":"116214828","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":"Linkages of CAD with other software applications for design in electrical manufacturing","authors":"A. D. Brown, T. Waggoner","doi":"10.1109/EEIC.2001.965600","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965600","url":null,"abstract":"Computer aided design (CAD) has greatly improved the engineering drawing production used in electrical manufacture. Linking CAD to other software functions greatly enhances the electronic format used in electrical manufacture. Instant updating and direct Internet access make these linkages very powerful tools in electrical component manufacture.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"37 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":"120996570","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":"Assessment of station cable condition using wireless telemetry and diagnostic tests","authors":"H. Sedding, S. Bomben, S. Rizzetto, R. Densley","doi":"10.1109/EEIC.2001.965676","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965676","url":null,"abstract":"In-service failure of 15 kV XLPE insulated cables in one of Ontario Power Generation's generating stations initiated an investigation of the root cause of breakdown. The type of failure resulted in the need to assess the condition of the remaining cables used in this application. This paper discusses the use of various analytical and diagnostic techniques used to identify the cause of failure as well as the application of wireless temperature measurements to operational condition monitoring of the remaining cables.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"51 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":"121196286","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":"Linear induction machine design for instructional laboratory development","authors":"J.R. Wells, L. Chapman, P. Krein, T. Walls","doi":"10.1109/EEIC.2001.965644","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965644","url":null,"abstract":"One of the difficulties of electric machinery laboratory courses is demonstrating the physics and internal geometry of a motor, particularly while it is operating,, As a solution to this challenge this paper presents the development of an open-frame linear induction rotor that alms students to easily visualized the motor while in motion, vary parameters err the motor design to observe their effect on performance, and gain experience with a type of motor that is teen overlooked in introductory courses. The motor has interchangeable parts such that other motor topologies may be implemented.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"20 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":"124935813","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":"In service turbine generators stator windings failure risks minimization on the base of discharge events on-line monitoring","authors":"Y. Aksenov","doi":"10.1109/EEIC.2001.965724","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965724","url":null,"abstract":"Results of the on-line insulation diagnostic of turbine generators are provided. Measures taken to ensure the reliability of 1000, 500, 220, 120 and 60 MVA generators are discussed. Features of faults that occurred in the various types of insulation are given. Results of the partial discharge locations using off-line diagnostics are provided. The approach for stator windings failure risks minimization has been demonstrated to be successful without subsequent failure: (i) about 70 turbine generators with no defects; (ii) 4 machines with arcing in core; (iii) 6 machines with slot discharges; and (iv) 15 with different insulation.","PeriodicalId":228071,"journal":{"name":"Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)","volume":"4 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":"131109688","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":"Investigation into terminating ignition coil primary magnet wire without prior removal of insulation","authors":"D. P. Lynch, W. Duff, J. E. Fleischmann","doi":"10.1109/EEIC.2001.965592","DOIUrl":"https://doi.org/10.1109/EEIC.2001.965592","url":null,"abstract":"Concerns with stripping and soldering copper magnet wire in ignition coils and other related products have led to the investigation of an alternative product and process design called microjoining. The use of microjoining with a folded over welding tab terminal design along with a parallel gap welding process is investigated as a suitable method for joining a tin plated brass terminal to the 0.65 mm magnet wire without prior removal of the polyesterimide overcoated polyamideimide insulation.","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":"114321862","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}