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2012 ELEKTRO最新文献

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Surge phenomena in system of transmission line and transformer winding 输电线路和变压器绕组系统中的浪涌现象
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225664
A. Předota, Z. Benešová, L. Koudela
{"title":"Surge phenomena in system of transmission line and transformer winding","authors":"A. Předota, Z. Benešová, L. Koudela","doi":"10.1109/ELEKTRO.2012.6225664","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225664","url":null,"abstract":"This paper deals with surge phenomena in the transformer winding which are caused by switching-on processes or by the lightning stroke into the overhead line. In both cases the surge voltage or the current wave propagating via the transmission line into the transformer winding are considered and influence of the transmission lines on a travelling surge wave is studied. The model of the whole system is based on the circuits with distributed parameters and is described with the system of partial differential equations. The mathematical model is solved numerically by FDTD method it results in the time-space distribution of the voltage and the current. It enables to determine the most dangerous points at the winding and to improve a design of the isolation system and system of protections. Some illustrative examples are solved and interesting results are presented.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121425251","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
Analysis of insulating state on transformer model using PDC method 用PDC法分析变压器模型的绝缘状态
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225657
J. Jurcik
{"title":"Analysis of insulating state on transformer model using PDC method","authors":"J. Jurcik","doi":"10.1109/ELEKTRO.2012.6225657","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225657","url":null,"abstract":"Paper is about mathematical interpretation of transformer insulation system. Base of this system is composed by two elements oil and paper. We need to simulate this system for more precisely results from measurement. Section three describes how to calculate relaxation currents and how that currents are generated. So we are able to compare measured and computed values and deduce actual condition of this insulation system.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123709421","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: 9
Vector control of two-phase IM using dSpace 基于dSpace的两相IM矢量控制
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225626
S. Kaščák, M. Praženica, M. Valčo, P. Cubon, M. Klasovity
{"title":"Vector control of two-phase IM using dSpace","authors":"S. Kaščák, M. Praženica, M. Valčo, P. Cubon, M. Klasovity","doi":"10.1109/ELEKTRO.2012.6225626","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225626","url":null,"abstract":"This paper deals with vector control of Two-Phase Induction Machine (TPIM). Each phase of induction motor is fed independently by one-phase full-bridge inverter. A general model suitable for Indirect Rotor-Field-Oriented Control (IRFOC) system of the two-phase induction machines including a relatively simple and effective decoupling scheme is proposed in the paper. However, model asymmetry in TPIM causes extra coupling between two stator windings. To use the IRFOC, the asymmetry must be eliminated by using an appropriate variable changing. A computer simulation and experimental verification of the IRFOC for two-phase induction motor drive is realized and results are presented.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125331825","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
2D photonic structure with square symmetry in the GaAs/AlGaAs LED surface GaAs/AlGaAs LED表面具有方形对称的二维光子结构
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225679
L. Suslik, D. Pudiš, J. Škriniarová, J. Kovác, I. Kubicová, I. Martincek, J. Novák, S. Hascik
{"title":"2D photonic structure with square symmetry in the GaAs/AlGaAs LED surface","authors":"L. Suslik, D. Pudiš, J. Škriniarová, J. Kovác, I. Kubicová, I. Martincek, J. Novák, S. Hascik","doi":"10.1109/ELEKTRO.2012.6225679","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225679","url":null,"abstract":"In this paper, effect of 2D photonic pattern on the emission properties of the GaAs/AlGaAs based light emitting diode (LED) emitting at wavelength of 850 nm is demonstrated. For LED surface patterning, the interference lithography based on a double-exposure process using two-beam interference method was used. The prepared photonic structure pattern in the LED surface was analyzed by atomic force microscope. Such prepared LED with 2D patterned photonic structure shows considerable enhancement of light extraction efficiency and improved far-field radiation pattern.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128319395","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
The comparison of CPU time consumption for image processing algorithm in Matlab and OpenCV 在Matlab和OpenCV中对图像处理算法的CPU时间消耗进行比较
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225575
S. Matuska, R. Hudec, M. Benco
{"title":"The comparison of CPU time consumption for image processing algorithm in Matlab and OpenCV","authors":"S. Matuska, R. Hudec, M. Benco","doi":"10.1109/ELEKTRO.2012.6225575","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225575","url":null,"abstract":"In order to fill gap of growing demand for high efficient image and video processing, open source computer vision library (OpenCv) is way to deals with this task. Hence, this paper is about basic algorithm for image processing and their CPU time consumption in Matlab comparing with OpenCv. Algorithms are tested on images with resolution 3264×2448, 1920×1080, 1024×768 and 220×260. Multi-processors computer and multi-threading programs are used to improve processing efficiency.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129038149","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: 40
Comprehensive technical safety analysis approach including common-cause failures 包括共因故障在内的综合技术安全分析方法
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225608
J. Ilavský, K. Rástočný
{"title":"Comprehensive technical safety analysis approach including common-cause failures","authors":"J. Ilavský, K. Rástočný","doi":"10.1109/ELEKTRO.2012.6225608","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225608","url":null,"abstract":"In order to gain an improvement of safety or availability measures of the safety-relevant control system through employment of redundancy a redundant system has to comply with the requirement on independence of redundant parts. If the requirements on the independence of redundant parts are unfulfilled, then a common-cause failure can through its effects on multiple redundant parts directly cause a hazardous state on a system level. Identification of sources and quantification of the common-cause failure parameters proved to be a formidable task. The latter problem, including other major safety-affecting factors lays in the focus of this paper. Our proposed technical safety analysis concept is extended, so now it partially covers elusive problems related to the common-cause failures.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126876803","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
Control of the inverted pendulum using state feedback control 利用状态反馈控制对倒立摆进行控制
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225627
A. Rybovic, M. Priecinsky, M. Paskala
{"title":"Control of the inverted pendulum using state feedback control","authors":"A. Rybovic, M. Priecinsky, M. Paskala","doi":"10.1109/ELEKTRO.2012.6225627","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225627","url":null,"abstract":"Solving the operation of the inverted pendulum is one of the classical and fundamental problems in the area of control theory. In this paper, method of modern control by placement poles with help Ackerman's method is presented. Control strategies are tested using simulation analysis and in real - time experiments which consists of hardware system PS600 and control units from dSpace company. The model is designed in MATLAB/Simulink environment. Finally, comparison of the results between the simulation model and the real plant is desribed.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116340596","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: 13
Creating model of open application interface for material flow control systems 建立物料流控制系统开放应用接口模型
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225620
P. Peniak
{"title":"Creating model of open application interface for material flow control systems","authors":"P. Peniak","doi":"10.1109/ELEKTRO.2012.6225620","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225620","url":null,"abstract":"The article deals with a model of application gateway and creation of an open application interface for generic Material Flow Control Systems (MFCs). The developed interface is to cover fundamental requirements of production systems for customization and real-time control of material flow within manufacturing processes. Designed solution has been tested and evaluated for Automated Guided Vehicle (AGV) supply system in real production environment.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128060339","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
Modal interferometer based on double cladding photonic crystal fiber for refractive index measurement by equalisation wavelength 基于双包层光子晶体光纤的模态干涉仪，波长均衡测量折射率
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225674
D. Kacik, P. Tatár
{"title":"Modal interferometer based on double cladding photonic crystal fiber for refractive index measurement by equalisation wavelength","authors":"D. Kacik, P. Tatár","doi":"10.1109/ELEKTRO.2012.6225674","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225674","url":null,"abstract":"We propose novel structure of double cladding Photonic crystal fiber (PCF) as a sensing element. First cladding allows one core mode propagation only. Second cladding consists of ring of holes with the average refractive index of the ring higher than the basic material of the fiber. Advantage of this arrangement against core - cladding interferometers is, that by suitable choice of refractive index of second cladding holes, the possibility to investigate the external refractive index in the region where phase constant of interfering modes shows an extreme (equalisation wavelength).","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124117345","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
Calculation of impulse response in Rician and Rayleigh channel 雷利和瑞利信道脉冲响应的计算
2012 ELEKTRO Pub Date : 2012-05-21 DOI: 10.1109/ELEKTRO.2012.6225580
Andrej Tkac, V. Wieser, S. Pollak
{"title":"Calculation of impulse response in Rician and Rayleigh channel","authors":"Andrej Tkac, V. Wieser, S. Pollak","doi":"10.1109/ELEKTRO.2012.6225580","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225580","url":null,"abstract":"In this paper the simulation of Rician and Rayleigh fading model and calculation of channel impulse response for these models are reported. Radio channels in radio systems are usually characterized as multipath fading channels. In environment between transmitter and receiver there exist two main signal propagation components, Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS), which are described through Rician fading model, resp. Rayleigh fading model. The parameter which is widely used for channel classification is the channel impulse response.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124769473","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
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