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2007 Electrical Insulation Conference and Electrical Manufacturing Expo最新文献

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Applications of silicon carbide power devices in three-phase voltage-fed induction motor drives for electric vehicles 碳化硅功率器件在电动汽车三相电压感应电动机驱动中的应用
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562632
N. Das, M. Kazimierczuk
{"title":"Applications of silicon carbide power devices in three-phase voltage-fed induction motor drives for electric vehicles","authors":"N. Das, M. Kazimierczuk","doi":"10.1109/EEIC.2007.4562632","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562632","url":null,"abstract":"The performance of the three-phase voltage-fed induction motor drives with SiC Schottky diodes operating in 180deg mode and 120deg mode is studied. The Cree SiC Schottky diodes CSD10060 with the reverse breakdown voltage VBR = 600 V and the maximum forward current Ipmia = 8 A are used. The inverter efficiency in 180deg mode operation is compared with that in 120deg mode operation by obtaining the losses in the circuit using PSpice simulations. The behavior of MOSFETs as well as the diodes in the inverter circuit operating at 180deg mode and 120deg mode is studied extensively using PSpice simulations.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"4 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":"130679082","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
Magnetic field disturbance of partial discharge activity in a cone-plane gap 锥面间隙局部放电活动的磁场扰动
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562606
D. Hepburn, B. Stewart, L. Dissado, J. Fothergill
{"title":"Magnetic field disturbance of partial discharge activity in a cone-plane gap","authors":"D. Hepburn, B. Stewart, L. Dissado, J. Fothergill","doi":"10.1109/EEIC.2007.4562606","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562606","url":null,"abstract":"This paper presents initial partial discharge results for a simple cone-plane gap geometry under applied high voltage when a DC magnetic field is present. Initial phase resolved Phi-q-n results show that the influence of a DC magnetic field as low as 70 mT appears to alter the distribution of the Phi-q-n patterns. This result is important in order to understand the physical PD degradation processes occurring in the presence of the magnetic field. The extent and nature of changes within Phi-q-n patterns when a magnetic field is present will also be discussed as these patterns are often used for the assessment of partial discharge source types and insulation diagnosis.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"6 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":"134498453","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: 7
Calculattng the induced currents in induction machines using Schwarz-Christoffel mapping 利用Schwarz-Christoffel映射计算感应电机的感应电流
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562656
T. O'Connell, P. Krein
{"title":"Calculattng the induced currents in induction machines using Schwarz-Christoffel mapping","authors":"T. O'Connell, P. Krein","doi":"10.1109/EEIC.2007.4562656","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562656","url":null,"abstract":"A new method for simulating induction machine rotor currents is presented that combines Schwarz-Christoffel mapping theory with electromagnetic field reconstruction techniques. Detailed static field solutions are calculated at several rotor positions over a pole pitch of motion, and these solutions are superposed in a finite difference time- domain simulation to calculate the steady-state rotor currents. Using the proposed method, one can simulate numerous machine geometries and stator excitations, and winding and slot harmonics as well as torque ripple can easily examined.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"11 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":"133058445","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
Shortening the hydrophobicity recovery time of epoxy insulation 缩短环氧绝缘的疏水性恢复时间
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562599
S. Clifford, P. Meier, C. Oelze, R. Mulhaupt
{"title":"Shortening the hydrophobicity recovery time of epoxy insulation","authors":"S. Clifford, P. Meier, C. Oelze, R. Mulhaupt","doi":"10.1109/EEIC.2007.4562599","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562599","url":null,"abstract":"The hydrophobicity recovery time of polymeric electrical insulation should be minimized to maintain self-cleaning properties in polluted environments. The high density of epoxy compared to silicone rubber insulation restricts the diffusion processes which are responsible for this behavior. This work investigates methods of overcoming this restriction, beginning with simplistic microstructural concepts and concluding that more complex nano-scale concepts are needed.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"25 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":"134630245","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
Partial discharge analysis to monitor the condition of oils 局部放电分析，监测油品状况
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562589
R. Patsch, J. Menzel, D. Benzerouk
{"title":"Partial discharge analysis to monitor the condition of oils","authors":"R. Patsch, J. Menzel, D. Benzerouk","doi":"10.1109/EEIC.2007.4562589","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562589","url":null,"abstract":"Partial discharges in oils are influenced by the actual dielectric properties of the liquid and especially degradation products may influence the phenomena. As a consequence of partial discharge processes, there may be bond scission and molecules of the dielectric may be degraded and/or split into molecules of shorter lengths that form a gaseous phase. This second phase can be generated in solids as well as in liquids. In solids the pressure in this gas phase will increase in accordance to the concentration of gas molecules. In liquids an increase of the concentration of molecules will lead to an extension of the gas volume until the pressure within the void corresponds to the external gas pressure. Consequently, in accordance to Faschen's law there will be gas discharges in this gas phase.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"52 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":"128102623","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: 4
New motor design with conductive micro fiber shaft grounding ring prevents bearing failure in PWE inverter driven motors 新型电机设计，导电微光纤轴接地环，防止PWE变频器驱动电机轴承故障
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562628
H. W. Oh, A. Willwerth
{"title":"New motor design with conductive micro fiber shaft grounding ring prevents bearing failure in PWE inverter driven motors","authors":"H. W. Oh, A. Willwerth","doi":"10.1109/EEIC.2007.4562628","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562628","url":null,"abstract":"Variable frequency drives induce shaft voltages onto the shaft of the driven motor because of the extremely high speed switching of the insulated gate bipolar transistors which produce the pulse width modulation used to control AC motors in commercial industrial and even consumer applications. This voltage induced on the shaft becomes great enough to overcome the dielectric of the oil film in the bearing causing bearing discharges known as electrical discharge machining effect. Unless mitigation for these shaft voltages is employed in the motor, the motor's bearings may become damaged from the electrical bearing currents which cause pitting and excessive bearing noise, fluting and finally motor failure. The cause of this problem and commonly applied mitigation methods are discussed as well as a new and highly effective conductive micro fiber shaft grounding ring technology which resolves these problems.","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":"130355578","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
Practical implementation of a narrowband high frequency distributed model for locating partial discharge in a power transformer 电力变压器局部放电定位的窄带高频分布模型的实际实现
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562603
S. Mitchell, J. Welsh, R. Middleton, B. Phung
{"title":"Practical implementation of a narrowband high frequency distributed model for locating partial discharge in a power transformer","authors":"S. Mitchell, J. Welsh, R. Middleton, B. Phung","doi":"10.1109/EEIC.2007.4562603","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562603","url":null,"abstract":"This paper proposes the use of a narrowband high frequency based distributed transformer model for estimating partial discharge location within the winding of an interleaved power transformer. At high frequencies, the residual inductance within a transformer winding becomes significant This inductive interaction generates its own characteristic response which, due to its distributed nature, can be utilized for partial discharge location. The technique proposed here takes advantage of the high frequency nature of a partial discharge and requires measurement at one location only. It also does not require detailed knowledge of the transformer's physical and material specifications. To confirm this approach, practical tests were conducted on a 66 kV/25 MVA interleaved transformer winding. The partial discharge injection was delivered by an oil immersed point-plane 7.5 kV source with the data captured using a current probe on the earth terminated neutral.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"58 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":"131168500","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: 6
An investigation into the electrical properties of rubber blends for insulators 绝缘子用共混橡胶的电性能研究
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562607
L. Nasrat, R. Sharkawy
{"title":"An investigation into the electrical properties of rubber blends for insulators","authors":"L. Nasrat, R. Sharkawy","doi":"10.1109/EEIC.2007.4562607","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562607","url":null,"abstract":"This paper focuses on testing silicone rubber (SiR) and ethylene-propylene-diene monomer (EPDM) blends which are applied as outdoor high voltage insulating materials. The study undertakes an investigation of the properties of aged specimens of SiR, EPDM and a blend of SiR/EPDM materials by exposure to ultra-violet radiation. Microscopic surface observations are demonstrated to inspect surface degradation after aging for blends of SiR/EPDM of different compositions. Measurements show that the dielectric strength of the specimen materials improve by an increase of EPDM content in the SiR/EPDM blend; whereas SiR produces better mechanical endurance after UV aging process. The investigation reveals that the blend between two materials induces results that have a moderate improvement in both the electrical and mechanical characteristics undertaken.","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":"124281919","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
Insulation resistance measurements versus temperature made on aged stator bars and coils 对老化的定子棒和线圈进行绝缘电阻与温度的测量
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562623
H. Zhu
{"title":"Insulation resistance measurements versus temperature made on aged stator bars and coils","authors":"H. Zhu","doi":"10.1109/EEIC.2007.4562623","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562623","url":null,"abstract":"The rule \"insulation resistance halving for a 10 degC increase in temperature for rotating machine insulation\" has been widely used in the industry. The rule was established based on testing of some insulation systems during the late 1950s. IEEE standard 43-2000 also provides a chart of the insulation resistance temperature coefficient versus temperature for correction of insulation resistance obtained at various temperatures based on this rule. However, it is unclear if this rule fits modern insulation systems. This paper presents laboratory tests on individual modern stator bars and coils to investigate insulation resistance versus temperature. The test results show that there is considerable discrepancy in the insulation resistance versus temperature characteristics between modern stator bars and old stator bars.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"24 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":"117000886","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: 7
Induction curing of encapsulates 封装材料的感应固化
2007 Electrical Insulation Conference and Electrical Manufacturing Expo Pub Date : 2007-10-01 DOI: 10.1109/EEIC.2007.4562645
P. Ross
{"title":"Induction curing of encapsulates","authors":"P. Ross","doi":"10.1109/EEIC.2007.4562645","DOIUrl":"https://doi.org/10.1109/EEIC.2007.4562645","url":null,"abstract":"The effectiveness of using induction heating for curing encapsulates in the manufacture of stators and armatures is presented. This paper focuses on a comparison of using convection oven heating vs. low frequency induction heating on a typical motor stator. Key characteristics such as time, temperature, and uniformity are analyzed. Low frequency (60 Hz) induction and traditional methods of heating available for encapsulation curing are discussed. The effect of frequency selection on induced heat depth will be discussed. Energy cost per piece, work in process requirements, and overall system flexibility is compared.","PeriodicalId":152045,"journal":{"name":"2007 Electrical Insulation Conference and Electrical Manufacturing Expo","volume":"70 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":"126326985","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
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