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Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.最新文献

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Field analysis and balancing tools 现场分析和平衡工具
D. H. Shreve
This paper first examines the needs for the basic set of tools for machine condition monitoring applications, including a look at the key elements of detection, analysis, and correction. It then examines the requirements for tools in each area, and proposes a solution on how they can be combined in one palm-sized instrument and portable toolkit for maintenance personnel
本文首先考察了机器状态监测应用对基本工具集的需求,包括检测、分析和校正的关键要素。然后,它检查了每个领域对工具的需求,并提出了一个解决方案,即如何将它们组合在一个手掌大小的仪器和便携式工具包中,供维护人员使用
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引用次数: 0
Revitalizing and refurbishment of motor control centers AT NJI & BMC NJI和BMC电机控制中心的改造和翻新
J.C. Pearson, D. Pandya
This paper provides a case study of considering an economical evaluation comparing a traditional approach of completely demolishing old electrical MCCs equipment versus investigating and replacing only the malfunctioning components in the MCC. The example below illustrates how a thorough investigation of existing electrical equipment can entirely alter previous planning decisions and have a drastic impact on cost estimates. A case study detailing the revitalization of 276, thirty three year old Motor Control Center (MCC) buckets, improved safety and security for our employees and facility equipment, extended overall life of the motor control center (MCCs), enhanced skills of our employees, and saved more than one million dollars for the US Postal facility-at Jersey City, NJ
本文提供了一个案例研究,考虑对传统方法进行经济评估,比较完全拆除旧电气控制系统设备与仅调查和更换控制系统中的故障部件。下面的例子说明了对现有电气设备的彻底调查如何完全改变以前的规划决策,并对成本估算产生重大影响。一个案例研究,详细介绍了276,33年历史的电机控制中心(MCC)桶的振兴,提高了员工和设施设备的安全性,延长了电机控制中心(MCC)的整体寿命,提高了员工的技能,并为新泽西州泽西城的美国邮政设施节省了100多万美元
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引用次数: 0
Considerations of AC and DC testing of large electrical stator windings and components 大型电气定子绕组和元件交流和直流测试的考虑
F. Emery
This paper is written on the basis of recommendations in IEEE Std 95-2002. It is common practice to use both AC and DC power supplies for the high potential testing of large electrical generator stator windings. A much higher voltage, well above the machine operating voltage; is almost always used. This paper reviews the procedures, results and test aspects of both the AC and DC testing of stator coils and the completed stator winding. The major issues addressed are the voltage levels used; where and when they are applied; the relationship between the AC and DC test voltage levels; what components of the winding are actually being tested; and are the presently used multiplication factors between DC and AC really being used correctly? A significant issue to address is that the stator coils and the stator winding layout, is designed to primarily get through the final AC or DC hi-pot test Should this present way of thinking still be followed in going forward in the future?
本文是根据IEEE Std 95-2002的建议编写的。对于大型发电机定子绕组的高电位测试,通常使用交流和直流电源。电压高得多,远高于机器工作电压;几乎总是被使用。本文综述了定子线圈和完整的定子绕组的交流和直流测试的过程、结果和测试方面。解决的主要问题是使用的电压水平;应用的地点和时间;交流和直流测试电压等级之间的关系;实际测试的是绕组的哪些组件;目前使用的直流和交流之间的乘法系数是否正确使用?需要解决的一个重要问题是,定子线圈和定子绕组的布局,主要是为了通过最终的交流或直流高罐测试而设计的,这种目前的思维方式在未来是否仍应遵循?
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引用次数: 6
Experimental study on the ion migration of DC support ceramic insulators 直流支撑陶瓷绝缘子离子迁移的实验研究
Chengrong Li, B. Qi, Z. Shu
A ion migration testing for DC ceramic support insulators was designed and conducted in this paper. After the long-term ion migration testing, the change of Na+ distribution in the tested samples was analyzed, and the mechanical performance of the tested samples was verified. It is indicated from our results that the ion migration testing in our laboratory doesn't influence the mechanical performance for the ceramic support insulators
设计并进行了直流陶瓷支撑绝缘子离子迁移试验。经过长期离子迁移测试,分析了被测样品中Na+分布的变化,验证了被测样品的力学性能。结果表明,离子迁移试验对陶瓷支撑绝缘子的力学性能没有影响
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引用次数: 0
Revisions of the periodic conformance testing procedures in the NEMA MW 1000 magnet wire standard 修订了NEMA MW 1000磁性线标准中的定期一致性测试程序
D. Barta
In the last few years, there has been a considerable amount of activity generated in the NEMA 6-MW Technical Committee due to a change in philosophy regarding the periodic conformance testing of magnet wire products. In the past, the periodic conformance tests have been designed around the special testing of a few standard AWG sizes, to define the unique properties of a particular magnet wire product type. These periodic conformance tests have been used to describe the uniqueness of the particular insulation system of the MW type, rather than to describe the expected performance of different wire sizes in these periodic conformance tests. The need to perform these periodic conformance tests on other wire sizes has created the demand for a new approach
在过去的几年中,NEMA 6-MW技术委员会产生了相当多的活动,因为关于磁性线产品定期一致性测试的理念发生了变化。在过去,定期一致性测试是围绕一些标准AWG尺寸的特殊测试设计的,以定义特定磁铁线产品类型的独特性能。这些定期一致性试验被用来描述MW类型的特定绝缘系统的独特性,而不是描述这些定期一致性试验中不同电线尺寸的预期性能。由于需要在其他电线尺寸上执行这些定期一致性测试,因此需要一种新的方法
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引用次数: 1
Evaluation of medium voltage groundwall insulation exposed to high frequency pulse voltages 高频脉冲电压下中压接地墙绝缘的评价
S. Haq, S. Jayaram, E. Cherney
Class-F 4.0 kV coils designed for medium voltage induction motors are aged under combined thermal and electrical stresses of 500 h at a constant temperature of 120degC and 200 h at a constant temperature of 150degC and stressed electrically at 60 Hz and with steep-front unipolar pulses of 40 ns rise time. The changes in the partial discharge activity and the dissipation factor as a function of time are reported. During ageing, the temperature profiles are recorded with an infrared camera as a means for determining the highest stressed regions. The experimental results show that pulse ageing is very severe when compared to 60 Hz ageing, despite using a lower pulse voltage, although the location where damage occurs on the groundwall insulation is different
设计用于中压感应电动机的f类4.0 kV线圈,在120℃恒温条件下老化500 h,在150℃恒温条件下老化200 h,在60 Hz电应力下老化,并在40 ns上升时间的陡前单极脉冲下老化。报道了局部放电活度和耗散系数随时间的变化。在老化过程中,用红外摄像机记录温度分布,作为确定最高应力区域的手段。实验结果表明,尽管使用较低的脉冲电压,但与60 Hz老化相比,脉冲老化非常严重,尽管损坏发生在地壁绝缘上的位置不同
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引用次数: 4
Exporting solid models into finite element analysis (FEA) for reverse engineering of electrical components 将实体模型导出到有限元分析(FEA)中,用于电气元件的逆向工程
T. Waggoner
Some products are reverse engineered RE as an origin in the design process while others are based on a new inception. In a globally competitive market it is important to reverse engineer electrical products and components for manufacture. Competitor's products are reverse engineered to generate a cost basis to keep a manufacturer's pricing in line with markets. The process of reverse engineering can also be used to regenerate obsolete parts or ones that are out of production and needed for service needs. The reverse engineered part or one designed completely in a solid modeling (SM) package parallels the future manufacture of the part and corresponding assembly. Animation and analysis are integrated into the SM and FEA modeling of the part
有些产品在设计过程中以逆向工程RE作为原点,而其他产品则基于一个新的起点。在全球竞争激烈的市场中,对电气产品和元件进行逆向工程是非常重要的。对竞争对手的产品进行逆向工程,以产生成本基础,使制造商的定价与市场保持一致。逆向工程的过程还可以用于再生过时的零件或已停产但服务需要的零件。逆向工程零件或完全在实体建模(SM)包中设计的零件与零件的未来制造和相应的装配平行。将动画和分析集成到零件的SM和FEA建模中
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引用次数: 2
Diagnosis of electrical treeing phenomenon in XLPE insulation 交联聚乙烯绝缘电气树状现象的诊断
Y. Juan, S. Birlasekaran
Electrical tree formed in XLPE insulation sliced from 220 kV rated cable was diagnosed by partial discharge and dielectrometry measurements and optical observation. The effects of aging by rate of rise in electrical stress and time are reported. Observed intermittent light emission and tree paths supported the theory of emission of protons due to high energy electrons
通过局部放电、介电测量和光学观察,诊断了220 kV额定电缆上切下的交联聚乙烯绝缘形成的电气树状结构。本文报道了电应力上升速率和时间对老化的影响。观察到的间歇性光发射和树状路径支持了高能电子发射质子的理论
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引用次数: 3
Material properties of conductive laminates used in turbine generator stator slots 涡轮发电机定子槽用导电层压板材料性能研究
M. Miller, F. Emery
Siemens power generation uses flat conductive laminate to aid in the wedging of stator coils for specific turbine generator stator winding designs. The laminate material must provide critical electrical, mechanical and thermal properties to properly function. This paper describes testing and interpretation of material test results for conductive laminate materials used as stator slot filler. The stator coil designs are gas-cooled using either hydrogen or air depending on the generator design
西门子发电使用扁平导电层压板,以帮助在特定的涡轮发电机定子绕组设计定子线圈楔入。层压板材料必须提供关键的电气、机械和热性能才能正常工作。本文介绍了用于定子槽填充物的导电层压板材料的试验和材料试验结果的解释。定子线圈的设计是气冷使用氢气或空气取决于发电机的设计
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引用次数: 0
A unique system for reducing high frequency stray noise and transient common mode ground currents to zero, while enhancing other ground issues 一个独特的系统,减少高频杂散噪声和瞬态共模接地电流为零,同时加强其他接地问题
R. Jacky, R.W. Hopkins, M. Panko
Variable frequency drives generate high frequency switching electrical noise. The components of a typical variable frequency drive are commonly capacitively coupled to an earth ground. The power devices used today allow high frequency currents and common mode currents to circulate within earth ground. These circulating currents initiate the degradation process to insulation systems of motors, their bearings, and also interference to other systems (ie: sensors, PLC's, industrial computers etc.). This new wiring design and method meet safety ground code requirements while reducing significantly high frequency and common mode ground currents. In this paper we will discuss the key components and operation of such a system and its application
变频驱动产生高频开关电气噪声。一个典型的变频驱动器的组件通常是电容耦合到一个地。今天使用的电源设备允许高频电流和共模电流在大地内循环。这些循环电流启动电机及其轴承的绝缘系统的退化过程,并干扰其他系统(即传感器,PLC,工业计算机等)。这种新的布线设计和方法满足安全接地规范要求,同时显著减少高频和共模接地电流。本文将讨论该系统的关键部件、工作原理及其应用
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引用次数: 0
期刊
Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.
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