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2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)最新文献

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LabVIEW modeling of frequency dependence of power losses in soft magnetic materials 软磁材料功率损耗频率依赖性的LabVIEW建模
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231938
S. Motoasca
{"title":"LabVIEW modeling of frequency dependence of power losses in soft magnetic materials","authors":"S. Motoasca","doi":"10.1109/OPTIM.2012.6231938","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231938","url":null,"abstract":"The paper deal with Steinmetz power losses equation developed in LabVIEW program. The initial equation is used after the area of hysteresis cycle is calculated using the LabVIEW VI's. It is important to have enough points considered on the major hysteresis loop to obtain with good accuracy the power losses. For this reason we use some VI's to interpolate the space between measurement data to have more datas. In this paper we made only the frequency dependence of the power losses and in the future we plan to go to the time domain. We try also to made the power losses separation between hysteresis losses and other losses taking for the DC case the frequency f=0,05 corresponding to IEC 60404 which specifies that for one major cycle is enough to be obtained in 20 seconds.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132929462","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 comparison of some Hurst parameter estimators 一些Hurst参数估计的比较
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231802
C. Stolojescu, A. Isar
{"title":"A comparison of some Hurst parameter estimators","authors":"C. Stolojescu, A. Isar","doi":"10.1109/OPTIM.2012.6231802","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231802","url":null,"abstract":"In the last few years the long-range dependence analysis of time-series became more important. A key parameter characterizing long-range dependent processes is the Hurst parameter H. The goal of this paper is to compare some estimation techniques for the Hurst parameter. We found that the best estimator is the one based on the second order discrete wavelet transform statistical analysis and works for second order wide sense stationary random processes.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133000477","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: 16
Sensitivity and tolerance analysis for oscillator circuits simulated by Van der Pol models 用Van der Pol模型模拟振荡器电路的灵敏度和容差分析
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231793
I. Dumitrescu, M. Iordache, L. Dumitriu, L. Mandache, D. Cordeau, J. Paillot
{"title":"Sensitivity and tolerance analysis for oscillator circuits simulated by Van der Pol models","authors":"I. Dumitrescu, M. Iordache, L. Dumitriu, L. Mandache, D. Cordeau, J. Paillot","doi":"10.1109/OPTIM.2012.6231793","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231793","url":null,"abstract":"The paper presents an improvement of sensitivity and tolerance analysis method for the Voltage-Controlled Oscillator (VCO) circuits with Van der Pol model. The tolerance analysis method is based on the Monte Carlo Analysis (MCA) and on the Fast Monte Carlo Analysis (FMCA) based on the circuit transfer function. The circuit sensitivities are computed by means of the derivatives of the circuit transfer functions. A practical and reliable approach has been developed and implemented in a computation program for linear (nonlinear piecewise-linearized) analog circuits. The circuits can contain any type of passive elements, independent and controlled sources. Powerful modified nodal approaches to build the mathematical model combined with some symbolic computation strategies have been exploited, in order to reduce the computational effort and to minimize the numerical errors. A software tool was conceived as a useful and valuable support for research and design engineers.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132119714","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
The methods to determine the series resistance and the ideality factor of diode for solar cells-review 太阳能电池用二极管串联电阻和理想因数的确定方法综述
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231814
D. Cotfas, P. Cotfas, D. Ursuțiu, C. Samoilă
{"title":"The methods to determine the series resistance and the ideality factor of diode for solar cells-review","authors":"D. Cotfas, P. Cotfas, D. Ursuțiu, C. Samoilă","doi":"10.1109/OPTIM.2012.6231814","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231814","url":null,"abstract":"The most important and accessible methods to determine the series resistance Rs and the ideality factor of the diode, m, for the solar cell are presented in this paper. The values of the two parameters obtained for a monocrystalline silicon solar cell with an area of 9cm2 are also presented comparatively. The measurements were realized using the NI ELVIS platform and the Solar Lab board, developed by the authors.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132190951","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
Influence of design parameters on a line start permanent magnet machine characteristics 设计参数对直线起动永磁电机特性的影响
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231962
S. Nedelcu, T. Tudorache, C. Ghita
{"title":"Influence of design parameters on a line start permanent magnet machine characteristics","authors":"S. Nedelcu, T. Tudorache, C. Ghita","doi":"10.1109/OPTIM.2012.6231962","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231962","url":null,"abstract":"This paper presents the design of a Line Start Permanent Magnets Synchronous Machine (LSPMSM) and the analysis of its starting capability. A preliminary sizing of the machine is carried out using an analytical procedure and the obtained solution is finally refined and completed by 2D Finite Element (FE) analysis. The effect of modifying the geometrical configuration of PMs, rotor bars and flux barriers on the LSPMSM starting capability is analyzed using the FLUX software package. This study is proved to be useful for the optimal design of the machine with the purpose of improving its start-up capability, one of the most sensible points of LSPMSM.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"35 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114030496","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: 8
A novel microactuator device based on magnetic nanofluid 一种基于磁性纳米流体的微致动器装置
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231963
A. Morega, L. Pîslaru-Dănescu, M. Morega
{"title":"A novel microactuator device based on magnetic nanofluid","authors":"A. Morega, L. Pîslaru-Dănescu, M. Morega","doi":"10.1109/OPTIM.2012.6231963","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231963","url":null,"abstract":"This paper presents the prototype of an actuator that utilizes a colloidal, super-paramagnetic, nanometric particles fluid as active medium. The experimental measurements show that magnetic properties of the fluid are adequate to the actuator working conditions. An electronic module for the control of the actuator ferrite cored coils was designed and produced; it implements the pulse width modulation (PWM) principle. The module produces train pulses of adjustable frequency and fill factor to drive the electrical currents in the actuator coils. The magnetic field produced by the actuator coils generates magnetic body forces in the magnetic fluid that add to gravitational forces to drive the fluid in a forced flow. The motion is perceived as periodic stationary surface waves, localized above the actuator coils. Mathematical modeling and numerical simulation (by the finite element method (FEM)) are used to study and evaluate these processes. The heat transfer part of the problem was also studied, although thermal stability proves to be less of a concern. The device may provide a usable actuation resolution, as the results suggests.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115989251","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
Analytical calculation of the constriction resistance for a switchgear pole of particular shape 特定形状开关柜杆缩窄阻力的解析计算
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231773
I. Nemoianu, E. Cazacu
{"title":"Analytical calculation of the constriction resistance for a switchgear pole of particular shape","authors":"I. Nemoianu, E. Cazacu","doi":"10.1109/OPTIM.2012.6231773","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231773","url":null,"abstract":"The paper provides a better evaluation of the electrical resistance in the case of a particular pole shape, common in many different power switchgears (circuit breakers, contactors, and isolators etc.), used for both low and high voltage installations use. Currently, the dimensioning, design and optimization of these devices relies mostly on empirical procedures and determinations. Our proposed analytical approach provides a more accurate relationship for the constriction resistance, method based on the solution of Laplace's equation verified by the electric field inside the pole's conductive domain, in the steady-state regime formulation. Separations of variables method was used, leading to an accurate expression for pole's electric resistance which takes into consideration the electric current constriction phenomenon. This precise relationship becomes particularly useful in various important design and dimensioning computations, e. g., the prospective value of short-circuit current, at a the specific level of the electric net, where these electrical apparatus are placed.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116440493","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
An efficient closed loop control system to follow, capture and redirect daylight 一个有效的闭环控制系统，跟踪，捕获和重定向日光
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231864
B. Wyns, C. Ionescu, D. Neamtu, R. D. De Keyser, J. de Maeyer, M. Michielssens
{"title":"An efficient closed loop control system to follow, capture and redirect daylight","authors":"B. Wyns, C. Ionescu, D. Neamtu, R. D. De Keyser, J. de Maeyer, M. Michielssens","doi":"10.1109/OPTIM.2012.6231864","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231864","url":null,"abstract":"Generally, one of the key requirements of modern buildings, besides an appropriate heating and ventilation, is to offer and maintain a suitable lighting. In this contribution, a description of a system capturing and re-directing sunlight into open spaces inside the building without affecting the inside temperature (isotherm) is given. The system mainly consists of three principal components: a mirror capturing the light of the sun and reflecting it inside the building via a prism system, a printed circuit board with two photovoltaic sensors for positioning the mirror, and finally, a motor rotating the printed circuit board and mirror. A closed-loop control system to track the movement of the sun is proposed. The results show good tracking behavior.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":" 41","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132123998","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
Power analysis of a heat pump with horizontal collectors 带水平集热器的热泵功率分析
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231924
A. Craciun, F. Sandu, G. Pana
{"title":"Power analysis of a heat pump with horizontal collectors","authors":"A. Craciun, F. Sandu, G. Pana","doi":"10.1109/OPTIM.2012.6231924","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231924","url":null,"abstract":"This paper presents some practical considerations for a residential heat pump system: the implementation of the ground loop, the power consumption during the 2010-2011 heating season, a comparison between a heat pump and a gas furnace heating system from the power point of view, the temperature monitoring subsystem and the ground temperature variations for one year period. The main goal of the paper is to demonstrate the heat pump advantages.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132356587","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
Tracking of electrical network frequency for the purpose of forensic audio authentication 跟踪电网频率，用于法医音频认证
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) Pub Date : 2012-05-24 DOI: 10.1109/OPTIM.2012.6231908
B. Gerazov, Z. Kokolanski, Goce Arsov, V. Dimcev
{"title":"Tracking of electrical network frequency for the purpose of forensic audio authentication","authors":"B. Gerazov, Z. Kokolanski, Goce Arsov, V. Dimcev","doi":"10.1109/OPTIM.2012.6231908","DOIUrl":"https://doi.org/10.1109/OPTIM.2012.6231908","url":null,"abstract":"Establishing the authenticity of audio evidence is a task of paramount importance in the field of audio forensics. A relatively new approach to establishing the authenticity of digital, as well as analog, audio recordings is the method of Electrical Network Frequency (ENF) analysis. The method is based on tracking the variations of the ENF in the mains hum present in the questioned recording, and comparing the track to a database of referent ENF recordings made directly from the power grid in the time period in question. The paper proposes one such system, designed to log the ENF track in high quality directly from the power lines. The signal conditioning modules provide several functions, such as: attenuation, galvanic isolation, filtering, A/D conversion etc. In this paper, directions for proper dimensioning of the signal conditioning modules are presented. Additionally, a prototype realization of a signal conditioning circuit and its characteristics are given. The power line signal recording for the purpose of audio authentication was realized by using a LabVIEW based virtual instrument.","PeriodicalId":382406,"journal":{"name":"2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128562987","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
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