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2007 Electrical Insulation Conference and Electrical Manufacturing Expo最新文献

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Effect of SiC schottky and Si junction diode reverse recovery on boost converter SiC肖特基和硅结二极管反向恢复对升压变换器的影响
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562634
V. Galigekere, M. Kazimierczuk
{"title":"Effect of SiC schottky and Si junction diode reverse recovery on boost converter","authors":"V. Galigekere, M. Kazimierczuk","doi":"10.1109/EEIC.2007.4562634","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562634","url":null,"abstract":"The effect of diode reverse recovery on the performance of a pulse-width modulated (PWM) dc-dc boost converter employed for active power- factor correction (PFC) is analyzed. A 250 W boost converter is designed as per the requirements of a power-factor-corrector circuit and simulated using PSPICE. The effect of the diode reverse-recovery current on the MOSFET, employed as the switch in boost PFC circuit, is analyzed and depicted by the aid of simulated waveforms. The performance of three similarly rated diodes: CSD100600 silicon carbide Schottky diode, ultra-fast recovery silicon junction diode MUR1S60, and soft-recovery silicon junction diode MSR860 are compared and the simulation results are presented.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131762607","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}
引用次数: 10
Outsourcing relationships between American and Chinese companies 中美公司之间的外包关系
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562640
M. Favreau, M. Miles, N. Hatch, V. Hawks
{"title":"Outsourcing relationships between American and Chinese companies","authors":"M. Favreau, M. Miles, N. Hatch, V. Hawks","doi":"10.1109/EEIC.2007.4562640","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562640","url":null,"abstract":"Outsourcing relationships between American and Chinese companies were studied using interviews and surveys. The data showed that American companies focus on labor costs and quality when making a decision to outsource production to a Chinese firm. Chinese firms secure American business by offering the lowest price possible. American firms were found to be generally pleased with cost performance of their outsourcing relationships, but less pleased with lead times of outsourced products. In addition, communication between the American and Chinese firms and employee training at Chinese firms are viewed as needing improvement.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124535088","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}
引用次数: 0
Diagnostic testing of stochastic circuits 随机电路的诊断测试
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562585
G. Bertini
{"title":"Diagnostic testing of stochastic circuits","authors":"G. Bertini","doi":"10.1109/EEIC.2007.4562585","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562585","url":null,"abstract":"The desire of circuit owners to prioritize their underground cable rehabilitation expenditures has spawned a variety of diagnostic testing tools. The goal of these diagnostic tests is to separate the \"at risk\" cable population into the subsets of those that are likely to provide reliable service for some time and those that are likely to fail first - the \"good\" from the \"bad.\" A decade of field failure data, covering over 18,000 km of cable installed over the 3 decades between 1969 and 1999 examined in this paper, provide statistically significant insights into the stochastic nature of cable reliability. A low cost method to prioritize circuit rehabilitation efforts is described. The method provides the foundation for the economic modeling and optimization of various rehabilitation strategies.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116610775","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}
引用次数: 1
Added value through injection molded insulation 通过注塑成型保温增加附加值
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562644
J. Frank
{"title":"Added value through injection molded insulation","authors":"J. Frank","doi":"10.1109/EEIC.2007.4562644","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562644","url":null,"abstract":"The insulation of stators can be done with aramid paper, powder coating or overmolding with thermoplastic material. The so called open system with aramid paper uses inexpensive materials but it takes longer cycles and it is expensive to obey environmental laws. Powder coating is also labour and time consuming and has, as open systems, not the ability to generate a 3D-geometry. The thickness of the insulation is thicker when doing the insulaton with overmolding, however, overmolding generates a lot of benefits: lower cycle times, less labour, 3D-geometrie like posts, ball-bearing seats and termination features. No secondary operations are needed. These added values have the potential to reduce the overall system cost significant.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122651439","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}
引用次数: 3
Our response — use of Resistive Temperature Detector as partial discharge sensors in rotating equipment 我们的对策是在旋转设备中使用电阻式温度检测器作为局部放电传感器
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562616
C. Kane, A. Golubev, I. Blokhintsev, C. Patterson
{"title":"Our response — use of Resistive Temperature Detector as partial discharge sensors in rotating equipment","authors":"C. Kane, A. Golubev, I. Blokhintsev, C. Patterson","doi":"10.1109/EEIC.2007.4562616","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562616","url":null,"abstract":"Much debate and misinformation has been published in various technical journals and in the marketplace on the use of resistive temperature detector (RTDs) as a sensor of partial discharges (PD) in motors and generators. The authors have more experience in this field of technology than any other company in the world. With hundreds of applications working in operating facilities and thousands of data records, this technology is well proven. This paper addresses the concerns in using RTDs as a PD sensor through sound technical analysis and case studies. Specific response to the paper titled \"investigations into the use of temperature detectors as stator winding partial discharge detectors\" presented at the 2006 IEEE International Symposium on Electrical Insulation is made.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123391425","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}
引用次数: 5
Carbon brush collector maintenance on turbine-generators 汽轮发电机碳刷收集器的维护
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562588
C. Maughan
{"title":"Carbon brush collector maintenance on turbine-generators","authors":"C. Maughan","doi":"10.1109/EEIC.2007.4562588","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562588","url":null,"abstract":"Carbon-brush collectors have historically been an operations/maintenance concern on turbine-generators. This is understandable in that this relatively small component is one of the most frequent causes of generator forced outages. The root cause of collector service problems is lack of performing the required on-going inspection and maintenance. While this inspection/maintenance effort is relatively minor, it is sometimes overlooked or done inadequately. This paper will discuss collector performance and root causes of collector forced outages, and will provide guidance on identifying and correcting collector operating conditions before serious problems develop. In addition, information is included on retrofit of fixed brush holders with removable brush holders. Performing of the items in the maintenance checklist at the end of the paper, Table 1, should greatly reduce or eliminate exposure to carbon-brush collector service problems.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130199337","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}
引用次数: 5
Development of new ways of designing of HV-insulation for power energetic with improved reliability on a basis of newest knowledge about surface discharge 在对表面放电的最新认识的基础上，开发提高可靠性的电力高压绝缘设计新方法
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562609
A. Valdman
{"title":"Development of new ways of designing of HV-insulation for power energetic with improved reliability on a basis of newest knowledge about surface discharge","authors":"A. Valdman","doi":"10.1109/EEIC.2007.4562609","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562609","url":null,"abstract":"The modern design of outdoor HV insulators is determined by rules that follow from characteristics of mechanisms of their flashover, such as: 1) The leader-streamer mechanism of breakdown of gaseous gaps close to dielectric surface under impulses of over voltages; 2) The mechanism of flashover of insulator on an AC by partial arcs with polluted and humidified surface. As a result of our research, [1-5], a new alternative mechanism of flashover of HV insulation was discovered and investigated. The mechanism was named - anomalous discharge (AD). As it was discovered, AD-mechanism has essential practical value because it's capable to generate full flashovers on majority of modern insulators at much smaller voltages than it was considered earlier, (lightning and switching over voltages and also on AC). This research is devoted to the efficiency of non-standard ways for control of AD with purpose to increase reliability of work of power energetic objects as a whole, i.e. increase the real BIL of their insulation.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"27 21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128625737","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}
引用次数: 0
DC-DC converters for electric vehicle applications 用于电动汽车的DC-DC转换器
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562633
D. Bellur, M. Kazimierczuk
{"title":"DC-DC converters for electric vehicle applications","authors":"D. Bellur, M. Kazimierczuk","doi":"10.1109/EEIC.2007.4562633","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562633","url":null,"abstract":"An integral part of any modern day electric vehicle is power electronic circuits (PECs) comprising of DC-AC inverters and DC-DC converters. A DC-AC inverter supplies the high power electric motor and utility loads such as air-conditioning system, whereas a DC-DC converter supplies conventional low-power, low-voltage loads. However, the need for high power bidirectional DC- DC converters in future electric vehicles has led to the development of many new topologies of DC-DC converters. This paper presents an overview of state-of-the-art DC-DC converters used in battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and fuel cell vehicles (FCVs). Several DC-DC converters such as isolated, nonisolated, half-bridge, full-bridge, unidirectional and bidirectional topologies, and their applications in electric vehicles are presented.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124645664","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}
引用次数: 127
Transformer basics 变压器基础知识
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/eeic.2007.4562642
V. Lebedev
{"title":"Transformer basics","authors":"V. Lebedev","doi":"10.1109/eeic.2007.4562642","DOIUrl":"https://doi.org/10.1109/eeic.2007.4562642","url":null,"abstract":"A transformer is a device that transfers electrical energy from one circuit to another by magnetic coupling without requiring relative motion between its parts. It usually comprises two or more coupled windings, and, in most cases, a core to concentrate magnetic flux. An alternating voltage applied to one winding creates a time-varying magnetic flux in the core, which induces a voltage in the other windings. Varying the relative number of turns between primary and secondary windings determines the ratio of the input and output voltages, thus transforming the voltage by stepping it up or down between circuits. The transformer principle was demonstrated in 1831 by Faraday, though practical design did not appear until the 1880s.Within less than a decade, the transformer was instrumental during the \"War of current\" in seeing alternating current systems triumph over their direct current counterparts, a position in which they have remained dominant. By transforming electrical power to a high voltage, low current form and back again, the transformer greatly reduces energy losses and so enables the economic transmission of power over long distances. It has thus shaped the electricity supply industry, permitting generation to be located remotely from points of demand. Amongst the simplest of electrical machines, the transformer is also one of the most efficient, with large units attaining performances in excess of 99.75%. Transformers come in range of sizes from a thumbnail- sized coupling transformer hidden inside a stage microphone to huge giga VA-rated units used to interconnect portions of national power grids. All operate with the same basic principles and with many similarities in their parts, though a variety of transformer designs exist to perform specialized roles throughout home and industry.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126283838","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}
引用次数: 8
Temperature and voltage dependence of dielectric properties of modern epoxy mica insulations of HV rotating machines 高压旋转机械环氧云母绝缘体介电性能的温度和电压依赖性
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562615
L. Lamarre, D. N. Nguyen, É. David
{"title":"Temperature and voltage dependence of dielectric properties of modern epoxy mica insulations of HV rotating machines","authors":"L. Lamarre, D. N. Nguyen, É. David","doi":"10.1109/EEIC.2007.4562615","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562615","url":null,"abstract":"The dependence of the dielectric properties of two types of modern epoxy mica insulation systems on temperature and voltage has been investigated. Resistance, capacity, polarization index and a number of other dielectric properties were measured over a temperature range of 20 to 100degC and at 1, S, 10 and 20 kV on rotating machine stator bars. This work will be submitted to the IEEE Std 43 committee.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132016688","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}
引用次数: 5
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