装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973745

M. Fujii, T. Iwase, H. Ihori, K. Arii

引用次数: 1

Using AC current parameters to evaluate aging condition of stator insulation 用交流电流参数评价定子绝缘老化情况

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973780

Yue Bo, Li Jian, Xiaohong Zhang, Cheng Yonghong, Hengkun Xie

{"title":"Using AC current parameters to evaluate aging condition of stator insulation","authors":"Yue Bo, Li Jian, Xiaohong Zhang, Cheng Yonghong, Hengkun Xie","doi":"10.1109/ISEIM.2001.973780","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973780","url":null,"abstract":"The stator winding insulation is one of the most important parts in large generators and electric motors. It is always subjected to the combined thermal, mechanical, electrical and environmental stresses during long-term operation. So the gradual deterioration of mechanical and electrical properties is inevitable. Continuous deterioration of electrical insulation will result in the decreasing of breakdown voltage and failure of generator or electric motor. It is very important for the safe operation of a large generator to inspect insulation condition and evaluate the remaining life of stator winding insulation. In order to assure the validity of evaluation, it is necessary to study the characteristic parameters that can indicate the condition of insulation deterioration. In this paper, a multi-stress aging system has been developed and the accelerated aging experiment based on the stator bars of 780 kW/6 kV electric motor has been conducted in the laboratory in order to simulate the practical aging of electric motor or generator in service. The developing laws of AC current parameters with aging time are analyzed. Moreover, the relations between the breakdown voltage and them are studied. During the process of multi-stress aging of epoxy/mica insulation, the AC current parameters, including the first and second AC current rapid voltage (U/sub pi1/, and U/sub pi2/), equivalent impedance and current increasing factor m/sub 2/, have apparent developing laws with aging of insulation. Moreover, the second AC current rapid increase voltage U/sub pi2/ shows close correlation with the residual breakdown. voltage, which can be used as a characteristic parameter to estimate the remaining life of epoxy/mica insulation. Therefore, the degradation of epoxy/mica insulation can be assessed efficiently by the AC testing method.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"171 1","pages":"725-728"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79461250","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

Time-lag measurement of void discharges and numerical simulation for clarification of the factor for partial discharge pattern 空隙放电的滞后测量和数值模拟，以澄清局部放电模式的影响因素

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973549

N. Hozumi, H. Nagae, Y. Muramoto, M. Nagao, H. Xie

引用次数: 10

Processing methods of particle-filled liquid resins and its correlation to electrical insulation properties of apparatus 颗粒填充液体树脂的加工方法及其与仪器电绝缘性能的关系

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973603

H. Steinzen, A. Kaindl

引用次数: 3

Effect of the electric pre-stress to dielectric property of epoxy polymer 电预应力对环氧聚合物介电性能的影响

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973605

Q. Ding, Zhonghua Li, Shouguo Sheng, L. Ding

引用次数: 1

Diagnosis of partial discharge in GIS based on UHF sensing technique 基于超高频传感技术的GIS局部放电诊断

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973636

L.J. Jin, J.Q. Huang, W.D. Liu, J. Qian

引用次数: 1

Study on prediction method of thermal deterioration of pole transformer with overloaded condition 过载状态下杆状变压器热劣化预测方法研究

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973738

Y. Mizutani, T. Ito, T. Takahashi, M. Nagata

引用次数: 2

Aging diagnosis of large generator stator winding insulation based on AC dielectric characteristic parameters 基于交流介电特性参数的大型发电机定子绕组绝缘老化诊断

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973776

Song Jiancheng, Cheng Yonghong, Xie Hengkun, Hao Junfang, Liu Haiying

{"title":"Aging diagnosis of large generator stator winding insulation based on AC dielectric characteristic parameters","authors":"Song Jiancheng, Cheng Yonghong, Xie Hengkun, Hao Junfang, Liu Haiying","doi":"10.1109/ISEIM.2001.973776","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973776","url":null,"abstract":"The long-term aging test for stator winding insulation (SWI) of large generator is carried out with multi-stresses, including thermal, electrical, mechanical and thermal cycling stresses. During aging periods, the characteristics of SWI are measured for the determination of deterioration degree. Some characteristic parameters, included PD intensity index PDI, PD phase index PDP, ac current rapid increase rate m/sub 2/, ac current rapid increase index /spl Delta//sub 3/ and so on, are proposed to diagnose the degradation condition of large generator SWI subjected to combined stresses. The definitions of PDI, PDP, m/sub 2/ and /spl Delta//sub 3/ are given in this paper. It is theoretically concluded that the PDI and PDP are the functions of dissipation factor tip-up and capacitance tip-up. The m/sub 2/ and /spl Delta//sub 3/ indicate the growth rate of ac current between the first rapid increase point and the second rapid increase point. The experimental results are given and the relationship between the new characteristic parameters and residual breakdown voltage of stator winding insulation are discussed. It has been verified that these parameters, especially PDI and m/sub 2/, have closely relations with the residual breakdown voltage of the specimen insulation.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"47 1","pages":"709-712"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77115384","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

Reduction of micro-scratch using slurry filter in oxide CMP (chemical mechanical polishing) for multi-level interconnections 用浆料过滤器在氧化物CMP(化学机械抛光)中减少多级互连的微划痕

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973571

Chul-Bok Kim, Sang-Yong Kim, Y. Seo

{"title":"Reduction of micro-scratch using slurry filter in oxide CMP (chemical mechanical polishing) for multi-level interconnections","authors":"Chul-Bok Kim, Sang-Yong Kim, Y. Seo","doi":"10.1109/ISEIM.2001.973571","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973571","url":null,"abstract":"Chemical mechanical polishing (CMP) process has been widely used to planarize dielectrics, which can apply to integrated circuits for sub-micron technology. Despite the increased use of CMP process, it is difficult to accomplish the global planarization of free-defects in the inter-level dielectrics (ILD). Especially, defects like micro-scratch lead to severe circuit failure, and affect yield. CMP slurries can contain particles exceeding 1 /spl mu/m size, which could cause micro-scratches on the wafer surface. The large particles in these slurries may be caused by particle agglomeration in slurry supply line. To reduce these defects, filtration has been recommended in oxide CMP. We have systematically studied the effects of filtration and the defect trend as a function of polished wafer count using various filters in inter-metal dielectric (IMD)-CMP process. The filter installation in CMP polisher could reduce defects after IMD-CMP process. Slurry filter plays an important role in determining consumable pad lifetime. The filter lifetime is dominated by the defects. Slurry filter lifetime is fixed by the degree of generating defects.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"35 1","pages":"91-94"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76146901","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: 2

Effect of interface on space charge in polyethylene 界面对聚乙烯空间电荷的影响

装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973714

Y. Tanaka, G. Chen, T.Y.G. Tay, T. Takada

引用次数: 6

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