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2008 11th International Conference on Optimization of Electrical and Electronic Equipment最新文献

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On the damper-bar current calculation for high power salient poles synchronous machines 大功率凸极同步电机阻尼杆电流的计算
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602379
A. Banyai, B. Kawkabani, J. Simond, I. Viorel, L. Vicol
{"title":"On the damper-bar current calculation for high power salient poles synchronous machines","authors":"A. Banyai, B. Kawkabani, J. Simond, I. Viorel, L. Vicol","doi":"10.1109/OPTIM.2008.4602379","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602379","url":null,"abstract":"The goal of the paper was to analyze the current distribution of a high-power salient-pole synchronous machine damper winding. A few methods were considered but only two analytical methods are highlighted. Both methods arc based on parameter calculation by considering the bars of the damper winding grouped in symmetrical loops referred to the direct and quadrature axis. Based on the developed procedures the damper bars currents in a large machine in the case of an asynchronous starting were calculated.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116944512","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
Obtaining the high performance PTC thermistors based on barium titanate 基于钛酸钡的高性能PTC热敏电阻的制备
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602353
J. Apostol, E. Helerea, I. Oltean, A. Matoi
{"title":"Obtaining the high performance PTC thermistors based on barium titanate","authors":"J. Apostol, E. Helerea, I. Oltean, A. Matoi","doi":"10.1109/OPTIM.2008.4602353","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602353","url":null,"abstract":"PTC thermistors based on semiconducting barium titanate are devices with large applications in electrical and electronic engineering, automotive industry, automation, telecommunication. Many efforts are done to improve the manufacturing technologies for obtaining the high performance PTC thermistors. The paper deals with the obtaining semiconductive ceramic based on barium titanate doped with niobium, with different techniques of structure control during the manufacturing to obtain optimal parameters. Different methods for obtaining the thermistors electric contacts are analyzed, tested and optimized. The ohmic metal-semiconductor contacts, with a good mechanical resistance, stable in time, which do not oxidize at low and high temperatures, are obtained using the different techniques: cathodic sputtering, screen printing, manually depositing by rubbing of an alloy. The measurements of electric resistance versus temperature for the representative samples are presented and some conclusions regarding the advantages of used techniques are underlined.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117174406","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
Integration design of fuzzy system using genetic algorithm for improvement of voltage profile with Static VAR compensator 基于遗传算法的模糊系统改进与静态无功补偿的集成设计
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602372
E. Saeidpour, M. Abedi, V.S. Parizy
{"title":"Integration design of fuzzy system using genetic algorithm for improvement of voltage profile with Static VAR compensator","authors":"E. Saeidpour, M. Abedi, V.S. Parizy","doi":"10.1109/OPTIM.2008.4602372","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602372","url":null,"abstract":"This paper proposed control of static VAR compensator (SVC) for improvement of voltage profile with fuzzy controller that tuned with genetic algorithm. Our method integrated two design stages; determinations of membership function and rules consequent parameters, because these stages may not be independent, it's important to consider them simultaneously to obtain optimal fuzzy systems. We present new method for insert genetic algorithm into fuzzy controller designation for non-linear and variable system. System equation is non-linear and not-clear and we can't use usual method for designation. We used from MATLAB simulator, for our simulations.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127231455","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
Reliable multicast protocols for wireless networks 无线网络可靠的多播协议
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602486
M. Martinescu, F. Sisak
{"title":"Reliable multicast protocols for wireless networks","authors":"M. Martinescu, F. Sisak","doi":"10.1109/OPTIM.2008.4602486","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602486","url":null,"abstract":"Wireless network topologies are used more and more in our days and their support was recently extended to the mobile devices market. This enables reception of high bandwidth Internet applications such as interactive television and data exchange. Because of the high demand of reliable and cost-efficient services a lot of work is still required for optimal results. The paper investigates the behavior of different error corrections algorithms used for reliable distribution of multimedia content to mobile devices. After a brief introduction to the existing algorithms, the study focuses on evaluating the performances of two error correction strategies with respect to the bandwidth usage. The simulation parameters are chosen to be in line with real case scenarios.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127270268","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
Experimental study on the large power transformer unit temperature variation 大型电力变压器机组温度变化的实验研究
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602360
T. Chiulan, B. Pantelimon
{"title":"Experimental study on the large power transformer unit temperature variation","authors":"T. Chiulan, B. Pantelimon","doi":"10.1109/OPTIM.2008.4602360","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602360","url":null,"abstract":"The monitoring systems of the transformer units are developed according to their loading guides, as their manufacturers specify. The problem that arises is due to the fact that the thermal models of the diverse versions of the loading guides do not yield similar results. Therefore, different values may be obtained for the same transformer unit with different monitoring systems. That is why the values provided by these systems and the standard thermal model should be compared. Another aspect, as important as the previous one; refers to the thermal model parameters that should be specified by the transformer unit manufacturers. The paper presents a mobile installation that was developed to perform these measurements and the results obtained on two 200 MVA power transformer units.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125428700","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 a dynamic nonlinear/ uncertain system via a variable structure system approach 动态非线性/不确定系统的变结构控制
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602456
F. Moldoveanu, J. Vittek, S. Ryvkir, D. Floroian, C. Boldisor
{"title":"Control of a dynamic nonlinear/ uncertain system via a variable structure system approach","authors":"F. Moldoveanu, J. Vittek, S. Ryvkir, D. Floroian, C. Boldisor","doi":"10.1109/OPTIM.2008.4602456","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602456","url":null,"abstract":"In this paper the control problem of nonlinear/ uncertain dynamic systems via a variable structure systems (VSS) approach is discussed. Observation of the states of such systems is also considered. The extension to an observer-controller design is illustrated using a computer simulation of a thetas-r manipulator position control.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122737685","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
Choosing suitable variants of Differential Evolution and Particle Swarm Optimization for the optimization of a PI cascade control 选择合适的微分进化和粒子群优化方法来优化PI级联控制
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602457
K. Zielinski, M. Joost, R. Laur, B. Orlik
{"title":"Choosing suitable variants of Differential Evolution and Particle Swarm Optimization for the optimization of a PI cascade control","authors":"K. Zielinski, M. Joost, R. Laur, B. Orlik","doi":"10.1109/OPTIM.2008.4602457","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602457","url":null,"abstract":"Robust control is an intensively studied field in control theory where analytical solutions for robust control problems often lead to complicated control structures. On the other hand, for simple structures like the PI cascade control l here are no analytical solutions which leads to the need of easy-to-use optimization algorithms. Differential evolution and particle swarm optimization are well suited for this problem because of the real-valued representation of solutions, fast convergence behavior and ease of use. However, seven al variants exist for both algorithms, and from literature if does not become clear which one performs best. Therefore, in this paper several strategies of differential evolution an d different neighborhood topologies for particle swarm optimization are applied for the optimization of a PI cascade control. A performance comparison shows that both algorithms are able to solve this optimization problem but especially using differential evolution the quality of the best solution varies for different strategies.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122880226","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: 5
MHD simulation of a vortex produced by a LIM in a small cylindrical vessel filled with molten aluminum MHD模拟了LIM在一个充满熔融铝的小圆柱形容器中产生的涡流
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602341
D. Morinigo, M.A. Rodriguez, A. Delgado, A. Rives, J. Martin
{"title":"MHD simulation of a vortex produced by a LIM in a small cylindrical vessel filled with molten aluminum","authors":"D. Morinigo, M.A. Rodriguez, A. Delgado, A. Rives, J. Martin","doi":"10.1109/OPTIM.2008.4602341","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602341","url":null,"abstract":"A computational and experimental investigation was carried out in an electromagnetically stirred molten aluminum. The molten metal was contained in a cylindrical vessel made of stainless steel. The vessel was positioned in front of a linear induction machine. The free-surface deformation was calculated using numerical simulation with ANSYS and FLUENT and was compared to experimental observations made on a laboratory-scale installation.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121879688","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
Theory of superexchange for 3dn-Ions (1≤n≤9) involved in natural and artificial magnets II- derivation of the various exchange energies Ji vs key molecular integrals 天然和人工磁体中3n -离子(1≤n≤9)的超交换理论II-各种交换能Ji与关键分子积分的推导
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602336
J. Curély, A. Mokrani
{"title":"Theory of superexchange for 3dn-Ions (1≤n≤9) involved in natural and artificial magnets II- derivation of the various exchange energies Ji vs key molecular integrals","authors":"J. Curély, A. Mokrani","doi":"10.1109/OPTIM.2008.4602336","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602336","url":null,"abstract":"In part I we have set the fundamental physical bases of a general treatment of superexchange for 3dn-metallic cations A and B (1lesnles9) characterized by sigma-type bonds on both sides of the diamagnetic bridge X without the presence of a pi-type orbital (with here A=B or AneB). In addition we have shown that, due to the electron-hole symmetry, the study may be restricted to the case of 3dn-ions (with 1lesnles5) because the treatment of the corresponding 3d10-n dual ion characterized by the same spin quantum number is formally strictly similar: in all the expressions obtained for the 3dn-ion (with 1lesnLt5) the charge of electron -e may be replaced by the charge of hole +e. In this part, we start from the intermediate cationic states defined in I, thus allowing to express the collective state describing the molecule AXB. In the last step we also express the exchange energies Ji of the various fragments AiXi of the bond A-X (or X-B) vs key molecular integrals characterizing this bond and defined in part I. Finally we remark that this general treatment may be employed to exactly calculate exchange coupling energies in more complex isolated molecules or ionic entities appearing in natural or artificial magnets.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122097302","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
Individualized learning enhanced by virtual reality 虚拟现实增强个性化学习
2008 11th International Conference on Optimization of Electrical and Electronic Equipment Pub Date : 2008-05-22 DOI: 10.1109/OPTIM.2008.4602518
G. Scutaru, A. M. Scapolla, M. Mustica, F. Sandu, D. Kristaly
{"title":"Individualized learning enhanced by virtual reality","authors":"G. Scutaru, A. M. Scapolla, M. Mustica, F. Sandu, D. Kristaly","doi":"10.1109/OPTIM.2008.4602518","DOIUrl":"https://doi.org/10.1109/OPTIM.2008.4602518","url":null,"abstract":"This paper presents the main outputs of the Socrates/Minerva project Individualized Learning Enhanced by Virtual Reality IDENTITY 229930-CP-1-2006-1-RO-MINERVA-M. The overall project objective is to produce a high level quality learning environment in an academic European network ensuring an open access to improved educational resources, as well as to the best practices. The main project outputs are: The Enhanced Individualized Learning Environment (EILE) and The VR-Learning Resources Centre, (VR-LRC). 1.","PeriodicalId":244464,"journal":{"name":"2008 11th International Conference on Optimization of Electrical and Electronic Equipment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116615204","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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