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2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)最新文献

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Application of a hybrid FEM-BEM method to the time response of an electromagnet under imposed terminal voltages 混合FEM-BEM方法在外加电压作用下电磁铁时间响应的应用
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133845
I. Ciric, M. Maricaru, M. Costea, G. Vasilescu, F. Hantila
{"title":"Application of a hybrid FEM-BEM method to the time response of an electromagnet under imposed terminal voltages","authors":"I. Ciric, M. Maricaru, M. Costea, G. Vasilescu, F. Hantila","doi":"10.1109/ATEE.2015.7133845","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133845","url":null,"abstract":"The paper presents a method for the analysis of the motion of an electromagnet armature when given voltages are applied at its terminals. The nonlinearity of the ferromagnetic core is treated by the polarization fixed point method (PFPM), the magnetic polarization correction being performed iteratively in terms of the magnetic field intensity. A hybrid Finite Element Method (FEM) - Boundary Element Method (BEM) technique is employed in order to solve the electromagnetic field problem. The FEM is used for the computation of the field within the ferromagnetic bodies and, independently, the BEM is applied to the outside free space, the coupling between the FEM and BEM domains being performed by an iterative correction of the boundary conditions. The terminal voltages determine the coil magnetic fluxes and, then, the current density is obtained by integrating the vector potential over the coil cross sections. The variation with time of the terminal voltages is also taken into account in the solution of the coupled electro-mechanical problem. The response is determined for terminal voltages applied at various times within a period.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123713154","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
Improvement of DC and RF performances of an AlGaN/GaN HEMT by a B0.01Ga0.99N back-barrier simulation study B0.01Ga0.99N后势垒模拟提高AlGaN/GaN HEMT直流和射频性能
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133931
L. Guenineche, A. Hamdoune
{"title":"Improvement of DC and RF performances of an AlGaN/GaN HEMT by a B0.01Ga0.99N back-barrier simulation study","authors":"L. Guenineche, A. Hamdoune","doi":"10.1109/ATEE.2015.7133931","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133931","url":null,"abstract":"The aim of this study is to improve the DC and RF performance of a conventional AlGaN/GaN HEMT and to suppress the short-channel effects by adding a BGaN back-barrier layer under the channel which improves the electron confinement in the two-dimensional electron gas 2DEG. Using TCAD Silvaco, we simulate some DC and RF characteristics, we note that the use of only 5 nm BGaN back-barrier layer shows a remarkable improvement compared to a conventional HEMT of 35% in the maximum drain current, 30% in the transconductance, 13% in the cut off frequency and 12% in the maximum oscillation frequency.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128239370","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
Study of ECG signal processing using wavelet transforms 基于小波变换的心电信号处理研究
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133671
A. Ciupe, N. Roman
{"title":"Study of ECG signal processing using wavelet transforms","authors":"A. Ciupe, N. Roman","doi":"10.1109/ATEE.2015.7133671","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133671","url":null,"abstract":"The aim of this paper is to process a noisy ECG signal obtained from recordings memorized in a database and to obtain the scalograms of some forms of the ECG. From the database we extract the noisy ECG, which is digitally filtered and displayed. For ECG signal processing, we have chosen the Continuous Wavelet Transform in order to determine the scalogram for detecting different pathologies.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124542240","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
Numerical study of the stator motion in a piezoelectric ultrasonic motor 压电超声电机定子运动的数值研究
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133878
A. Morega, G. Robello, M. Morega, L. Pîslaru-Dănescu
{"title":"Numerical study of the stator motion in a piezoelectric ultrasonic motor","authors":"A. Morega, G. Robello, M. Morega, L. Pîslaru-Dănescu","doi":"10.1109/ATEE.2015.7133878","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133878","url":null,"abstract":"This paper presents mathematical modeling and numerical simulation results that are part of a study concerning the dynamics of the stator of piezoelectric (PZ) traveling wave (TW) rotating ultrasonic motor. The stator is a PZ composite ring, and the rotor is a metallic ring. The rotational torque is produced by exciting the stator into a flexural traveling wave, transmitted to the rotor through the stator-rotor friction. A modal analysis provides for the structural eigenfrequencies of the stator. When the AC powering stage providing for two voltages of same amplitude and shifted in quadrature is adapted to a frequency close to the flexural resonance of the stator, the TW reaches higher amplitudes that result in higher rotational velocities because the rotor speed is proportional to the stator TW amplitude.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124546711","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
Modeling of solid electrolyte based on ceria for intermediate temperature fuel cells 基于二氧化铈的中温燃料电池固体电解质建模
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133850
A. Ionascu, P. Notingher, R. Bercia
{"title":"Modeling of solid electrolyte based on ceria for intermediate temperature fuel cells","authors":"A. Ionascu, P. Notingher, R. Bercia","doi":"10.1109/ATEE.2015.7133850","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133850","url":null,"abstract":"Impedance Spectroscopy (IS) is considered one of the most popular methods to the characterization of ceramic materials used as electrolytes for fuel cells, such as, solid oxide fuel cells (SOFCs) and intermediate temperature - solid oxide fuel cells (IT-SOFCs). However, experimental data analysis requires developing a model describing the electrical behavior of the solid electrolyte. The aim of this paper is to characterize the electrical behavior of sintered composite based on ceria using a new model. Therefore, the measurements of impedance components (Z' and Z\"), of two composites based on ceria, designed to be used as solid electrolytes for intermediate temperature fuel cells (IT-SOFC) were performed by Impedance Spectroscopy (IS). The materials are two different composites based on ceria 10YDC + (10%) 150ppm YA (E1) and 10ScDC + (10%) 150ppm YA (E2), obtained by sol-gel method and sintered at temperature of 1500 °C. Two models (microstructural and electric) were applied for determining the electrical conductivity and permittivity of grains (σg and εrg) and grain boundaries (σgb and εrgb) values and the components of the complex impedance Z (Z' and Z\") at different frequencies. The composite E1 presents better conductivities (σg and σgb) than E2 and it is favorable for use as solid electrolyte fuel cells.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131366121","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
Temperature distribution in solder joints during melting and solidification 焊点熔化和凝固过程中的温度分布
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133853
K. Dušek, C. Stancu, P. Notingher, P. Mach
{"title":"Temperature distribution in solder joints during melting and solidification","authors":"K. Dušek, C. Stancu, P. Notingher, P. Mach","doi":"10.1109/ATEE.2015.7133853","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133853","url":null,"abstract":"The most vulnerable components of electronic circuits (PCA - Printed Circuit Assembly) are the solder joints. During the soldering process different anomalies may occur (changes in the reflow temperature profile, different cooling rates) leading to the inception of some defects, as excessive voids inside the solder, brittle phase formation, concentration gradients of elements or metallurgical composition etc. To avoid this, it is mandatory to follow the parameter values of the reflow process (speed, temperature values etc.). Temperature computing model for two PCA samples during the reflow soldering process, by using Comsol Multiphysics software (heat transfer 3 D module) is presented in this paper. PCA samples with and without resistor contains substrate with two soldering pads together with lead free solder. To carry out the computations, the latent heat of fusion/solidification and the variation with the temperature of the alloy parameters were considered. The results show that the presence of the resistor leads to the decrease of the temperature in the alloy during melting and its increase during solidification.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130052633","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
Presentations and laboratory developed in LabVIEW using microsoft agent 演示文稿和实验室开发在LabVIEW使用微软代理
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133749
Sorin Dan Grigorescu, S. Paturca, Costin Cepicca
{"title":"Presentations and laboratory developed in LabVIEW using microsoft agent","authors":"Sorin Dan Grigorescu, S. Paturca, Costin Cepicca","doi":"10.1109/ATEE.2015.7133749","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133749","url":null,"abstract":"Research in e-Learning, Micro Learning and all activities where ITC and multimedia are implied in the process of learning brought a significant debate on the utility of narration in the process. Far from intended to solve this discussion, this paper is about the use of animated agents in presentation integrated with LabVIEW with the benefit of Data Acquisition and Virtual Instrumentation for activities close to micro learning in workshops.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"30 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120913830","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
Coupling factor of planar power coils used in contactless power transfer 非接触式电力传输中平面功率线圈的耦合系数
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133828
A. Marinescu, I. Dumbravă
{"title":"Coupling factor of planar power coils used in contactless power transfer","authors":"A. Marinescu, I. Dumbravă","doi":"10.1109/ATEE.2015.7133828","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133828","url":null,"abstract":"Contactless power transfer is a major concern due to its many applications in the modern technique. Different topologies for transmission in near field (magnetic or electric) are presented in literature, with emphasis on the process efficiency, especially when such systems are used for medium or high powers, like those needed for charging the storage batteries from electric/hybrid cars. One of the key elements of the system that provides the contactless magnetic inductive coupling between the power source and user, herein after referred to as inductive coupler, is analyzed in this paper. For reasons of space, this is usually an air-core transformer, with planar, movable windings, for easy adaptation to the conditions of using it. In order to indentify rapidly its parameters, the automatic determination of the transfer function by a vector network analyzer (VNA), apparatus currently used in laboratories, is utilized in this paper. No previous measurement is required.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127363397","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
Impact of charging Electric Vehicles in residential network on the voltage profile using Matlab 基于Matlab的住宅电网电动汽车充电对电压分布的影响
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133909
A. Neagoe-Stefana, M. Eremia, L. Toma, A. Neagoe
{"title":"Impact of charging Electric Vehicles in residential network on the voltage profile using Matlab","authors":"A. Neagoe-Stefana, M. Eremia, L. Toma, A. Neagoe","doi":"10.1109/ATEE.2015.7133909","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133909","url":null,"abstract":"In this paper it is proposed an algorithm for charging the Electric Vehicles (EVs) in the residential network and the impact of charging EVs on the voltage plan of electric grid. The simulations were performed on a radial low voltage grid with 15 residential consumers and there are studied two cases: the voltage profile of residential grid without EVs and the voltage profile when each residential consumer charges his EV at home at a minimal current. The algorithm was developed under Matlab software using values of power consume with a discretization of 10 minutes.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129001434","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: 7
Irradiation effect on PA6 properties of electrical insulation 辐照对PA6电绝缘性能的影响
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) Pub Date : 2015-05-07 DOI: 10.1109/ATEE.2015.7133852
Caramitu Alina Ruxandra, Zaharescu Traian, Mitrea Sorina
{"title":"Irradiation effect on PA6 properties of electrical insulation","authors":"Caramitu Alina Ruxandra, Zaharescu Traian, Mitrea Sorina","doi":"10.1109/ATEE.2015.7133852","DOIUrl":"https://doi.org/10.1109/ATEE.2015.7133852","url":null,"abstract":"The testing of polyamide 6 under accelerated ageing by D-irradiation was accomplished for the evaluation of its functional characteristics as electrical insulation. Two groups of complementary procedures: chemiluminescence and dielectric feature measurements were applied. The explanation of structural modifications in relation with the changes in electrical behavior is presented.","PeriodicalId":103513,"journal":{"name":"2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"8 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114019759","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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