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Photo-induced in-plane alignments of liquid crystal molecules on layer-by-layer films and attenuated total reflection properties 液晶分子在逐层薄膜上的光致面内排列及其衰减全反射特性
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973743
F. Kaneko, J. Ishikawa, K. Shitasue, A. Baba, K. Shinbo, K. Kato, R. Advíncula
{"title":"Photo-induced in-plane alignments of liquid crystal molecules on layer-by-layer films and attenuated total reflection properties","authors":"F. Kaneko, J. Ishikawa, K. Shitasue, A. Baba, K. Shinbo, K. Kato, R. Advíncula","doi":"10.1109/ISEIM.2001.973743","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973743","url":null,"abstract":"In this report, photo-induced in-plane alignments of nematic liquid crystal (LC) molecules, 5CB, have been investigated in LC cells prepared with alternate Direct Red 80 (DR80 : azo dye) and poly(diallyldimethylammonium chloride) (PDADMAC) self-assembled films on gold electrodes using the attenuated total reflection (ATR) measurement method. From the ATR curves, in-plane switching properties and alignment of the LC molecules in the LC cells were evaluated during and after irradiation with linearly polarized light.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"20 1","pages":"607-610"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82366500","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
A cable terminator for partial discharge and dielectric loss measurements 用于局部放电和介质损耗测量的电缆终端
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973719
K. Nakaviwat, S. Kumpiranont, C. Boonseng, P. Apiratikul, A. Kunakorn
{"title":"A cable terminator for partial discharge and dielectric loss measurements","authors":"K. Nakaviwat, S. Kumpiranont, C. Boonseng, P. Apiratikul, A. Kunakorn","doi":"10.1109/ISEIM.2001.973719","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973719","url":null,"abstract":"This paper presents the design of a cable connector used in partial discharge and dielectric loss tests. The body of the connector is constructed using an acrylic tube and PVC, and oil is used as an insulating medium. In order to implement the connector, partial discharges and the dielectric loss (tan /spl delta/) of a cable are tested according to IEC standards. It is found that the cable connector proposed can give satisfactory and reasonably accurate results from the measurements. In addition, the cost of the construction of the connector developed is cheaper than that of the commercial module.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"73 1","pages":"528-531"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84322167","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
Applying study on principle and method PD pattern recognition with fractal to profile of PD distribution 分形PD模式识别原理和方法在PD分布剖面中的应用研究
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973583
Xin Li, Caixin Sun, Jun Yu Li, R. Liao, Quan Zhou
{"title":"Applying study on principle and method PD pattern recognition with fractal to profile of PD distribution","authors":"Xin Li, Caixin Sun, Jun Yu Li, R. Liao, Quan Zhou","doi":"10.1109/ISEIM.2001.973583","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973583","url":null,"abstract":"This paper adopts two kinds of fractal analysis to profile partial discharge (PD) distribution. The analysis results show that fractal dimension can be effectively used as a new feature in PD pattern recognition.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"38 1","pages":"127-129"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78740526","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
Effect of pulse propagation characteristics in power transformer on partial discharge recognition 电力变压器脉冲传播特性对局部放电识别的影响
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973803
Wensheng Gao, K. Tan
{"title":"Effect of pulse propagation characteristics in power transformer on partial discharge recognition","authors":"Wensheng Gao, K. Tan","doi":"10.1109/ISEIM.2001.973803","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973803","url":null,"abstract":"An experimental method is utilized to investigate the propagation characteristic of discharge pulse and its influence on the recognition of partial discharge in this paper. Firstly, the discharge model tests of common defect in oil-paper insulation are finished. A series of tests are conducted to study the propagation characteristic of discharge pulse along the winding. Thus the identification of discharge waveform could be implemented. The restoring method of the original wave and the extracting method of wave characteristic are also put forward. Finally the backpropagation (BP) neural network is utilized to recognize the wave characteristic of discharge signal. The validity of recognition system is illustrated.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"27 1","pages":"817-820"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89277712","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
Study on the interference of humidity and acidity with the insulation ability of 10 kV opening bus 湿度、酸度对10kv开路母线绝缘性能的干扰研究
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973657
Mingjia Li, W. Sima, L. Gu, Mingying Chen, J. Yang
{"title":"Study on the interference of humidity and acidity with the insulation ability of 10 kV opening bus","authors":"Mingjia Li, W. Sima, L. Gu, Mingying Chen, J. Yang","doi":"10.1109/ISEIM.2001.973657","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973657","url":null,"abstract":"This paper reports on the insulation ability of 10 kV opening bus by simulating the practical situation of Xiaolongkan substation in Shapingba district Chongqing City in China. Both the interference from relative humidity (RH=70%, 80%, 90%, 100%) plus acidity(pH=3,4,5,6) and the layout method of bus (horizontal and vertical) were studied to observe the performance of the AC insulation ability of the opening bus, which refers to the composite insulation ability of the air distant between phases and post insulators in this paper. It is found that with increasing RH, the flashover voltage of the bus first increases when RH<80%, then decreases rapidly when RH>80%. At the same time, with increasing pH, the flashover voltage of the bus increases. Moreover, when RH<80%, flashover takes place between phases, and when RH>90%, flashover takes place on the surface of post insulators. Constructive advice concerning the running safety of 10 kV opening buses in power systems is presented.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"113 1","pages":"313-315"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79328565","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 and breakdown characteristics on needle/dielectrics composite electrode systems under pulse voltage 脉冲电压下针/介质复合电极系统的局部放电和击穿特性
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973599
N. Sakamoto, Y. Kuninaka, H. Ueno, H. Nakayama
{"title":"Partial discharge and breakdown characteristics on needle/dielectrics composite electrode systems under pulse voltage","authors":"N. Sakamoto, Y. Kuninaka, H. Ueno, H. Nakayama","doi":"10.1109/ISEIM.2001.973599","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973599","url":null,"abstract":"Studied the discharge characteristics on the composite electrode under a pulse voltage in N/sub 2./ The configuration is a needle-plane one, in which the needle is in contact with solid dielectrics, with a narrow gap. The configuration has a plurality of places of the local high field, namely a needle tip and another a triple junction. To examine a local corona behavior, we used ZnO for the needle electrode. Consequently, discharge voltages changed depending on the polarity of applied voltage and the kind of dielectric.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"8 1","pages":"175-178"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78306203","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
Dynamic mechanical analysis of degradation of rotating machine composite insulation 旋转机械复合材料绝缘退化的动态力学分析
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973777
Song Jiancheng, Xie Hengkun, Liu Haiying, Hao Junfang
{"title":"Dynamic mechanical analysis of degradation of rotating machine composite insulation","authors":"Song Jiancheng, Xie Hengkun, Liu Haiying, Hao Junfang","doi":"10.1109/ISEIM.2001.973777","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973777","url":null,"abstract":"The long-term accelerated aging tests in laboratory environment has been conducted on the composite insulating materials (CIM) of actual rotating coils subjected combined stresses including thermal, electrical, mechanical and thermal cycling stresses. The dynamic mechanical experiments of CIM has been carried out in the different aging periods using dynamic mechanical analyzer (DMA) and the relationships between mechanical parameters and the aging time of CIM is also analyzed in this paper. Based on the Eyring absolute reaction speed theory, a method calculating the apparent activation energy of glass transition (AAEGT) is developed. By DMA, it has been suggested that the dynamic mechanical parameters, such as dynamic modulus, temperature of glass transition, dynamic mechanical loss peak value, width of half a peak value and apparent activation energy of glass transition can be used to characterize the aging properties of large generator stator composite insulating materials.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"95 1","pages":"713-716"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79174868","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
On-line monitoring of winding deformation of power transformer 电力变压器绕组变形在线监测
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973812
D.K. Xu, J. Huang, Y.M. Li
{"title":"On-line monitoring of winding deformation of power transformer","authors":"D.K. Xu, J. Huang, Y.M. Li","doi":"10.1109/ISEIM.2001.973812","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973812","url":null,"abstract":"The feasibility of estimating transformer winding deformation by measuring short-circuit reactance is expounded. Based on the theoretical research, the on-line measurement system for short-circuit reactance of a transformer is proposed. The study on a power transformer in actual operating condition shows that the on-line method is satisfactory for detecting short-circuit reactance variations with high degree of accuracy and good stability, and can be used for detecting deformation in the transformer windings.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"2 1","pages":"853-856"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78336346","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: 27
Geometrical effects in the current measurement by Rogowski sensor Rogowski传感器电流测量中的几何效应
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973692
Kang-Won Lee, Jeong-Nam Park, Seong-Hwa Yang, Yong-Shin Lee, Gil-Ho Ham, Yong-mu Jang, K.J. Lim
{"title":"Geometrical effects in the current measurement by Rogowski sensor","authors":"Kang-Won Lee, Jeong-Nam Park, Seong-Hwa Yang, Yong-Shin Lee, Gil-Ho Ham, Yong-mu Jang, K.J. Lim","doi":"10.1109/ISEIM.2001.973692","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973692","url":null,"abstract":"Rogowski coil is made having no ferromagnetic material in a core. So the coil cannot be driven into saturation. This result in that Rogowski coils may be calibrated at relatively low currents, and used with confidence at very high currents. However the lowest level of current that can be measured is limited by the sensitivity of the voltage measuring instrument and system noise. Therefore, geometrical effects were investigated in order to measure high sensitivity of low level current and the significant source of error was examined as well. In the results, the sources of error were associated with coil designs, i.e. shape, uniformity and a geometrical location of current source inside and outside of the Rogowski coil.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"14 1","pages":"419-422"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83399044","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: 19
Effect of facility for hot spot reduction of inter-level dielectric (ILD) CMP process 设备对层间介电(ILD) CMP工艺热点减少的影响
装备机械 Pub Date : 2001-11-19 DOI: 10.1109/ISEIM.2001.973573
So-young Jeong, Y. Seo, Sang-Yong Kim
{"title":"Effect of facility for hot spot reduction of inter-level dielectric (ILD) CMP process","authors":"So-young Jeong, Y. Seo, Sang-Yong Kim","doi":"10.1109/ISEIM.2001.973573","DOIUrl":"https://doi.org/10.1109/ISEIM.2001.973573","url":null,"abstract":"Chemical mechanical polishing (CMP) process is widely used for global planarization of inter-level dielectric (ILD) for sub-micron technology. But the hot-spot due to partial over-polishing was generated in the edge of wafers, and became a major concern. Thus, it is very important to understand the correlation between ILD-CMP process and various facility factors of CMP equipment system. With facility shortage of deionized water (DIW) pressure, we introduced an adding purified N/sub 2/ (PN/sub 2/) gas in polishing head cleaning station for increasing a cleaning effect. Our experimental results show that DIW pressure and PN/sub 2/ gas factors were not related with removal rate, but edge hot-spot of patterned wafer had a serious relation. We estimated two factors (DIW pressure and PN/sub 2/ gas) for the improvement of CMP process. Especially, we obtained a uniform planarity in patterned wafer and prohibited more than 90% of wafer edge over-polishing. Finally, we suggest that the facility factors supplied to equipment system play an important role in ILD-CMP process.","PeriodicalId":71964,"journal":{"name":"装备机械","volume":"14 1","pages":"95-98"},"PeriodicalIF":0.0,"publicationDate":"2001-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73509513","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
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