Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850990
F. Feier, I. Enătescu, C. Ilie, I. Silea
Newborns' cry is one of the very few indicators on the newborns' state of health. A couple of studies have been performed in the last 20 years with the goal of extracting valuable information from the newborns' cry in order to find out valuable information that would normally be obtained from excessive invasive tests or not available at all with current state of the art medical techniques. Among the focuses of the most recent studies, pathologies like asphyxia, hypoxia, hypothyroidism or hearing disorders are investigated to determine correlations between these and features from the cry signal. In this study, a considerable amount of recorded cry signals from newborns' (300 subjects) is studied in order to classify, by the use of data mining techniques. For this classification four categories of newborns' were considered: newborns' with no detected health issues or problems at birth, newborns' that suffered umbilical cord strangulation at birth, premature born babies (before 38 weeks of pregnancy) and newborns' with different pathologies not included in one of the above categories. By the use of data mining techniques (classification trees, decision rules and lazy algorithms) a classification with very good accuracy has been made for the first three of the above mentioned newborn categories.
{"title":"Newborns' cry analysis classification using signal processing and data mining","authors":"F. Feier, I. Enătescu, C. Ilie, I. Silea","doi":"10.1109/OPTIM.2014.6850990","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850990","url":null,"abstract":"Newborns' cry is one of the very few indicators on the newborns' state of health. A couple of studies have been performed in the last 20 years with the goal of extracting valuable information from the newborns' cry in order to find out valuable information that would normally be obtained from excessive invasive tests or not available at all with current state of the art medical techniques. Among the focuses of the most recent studies, pathologies like asphyxia, hypoxia, hypothyroidism or hearing disorders are investigated to determine correlations between these and features from the cry signal. In this study, a considerable amount of recorded cry signals from newborns' (300 subjects) is studied in order to classify, by the use of data mining techniques. For this classification four categories of newborns' were considered: newborns' with no detected health issues or problems at birth, newborns' that suffered umbilical cord strangulation at birth, premature born babies (before 38 weeks of pregnancy) and newborns' with different pathologies not included in one of the above categories. By the use of data mining techniques (classification trees, decision rules and lazy algorithms) a classification with very good accuracy has been made for the first three of the above mentioned newborn categories.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126112599","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6851003
M. Popescu, M. Dobriceanu, M. Linca, G. Oprea
This paper is concerned with the practical implementation of some orthogonal reference frame based methods in the control of a shunt three-phase three wire active power line conditioner in order to compensate unbalanced nonlinear loads under nonideal voltage conditions. The first two developments are based on the components of voltage and current space vectors in the orthogonal stationary reference frame associated with the p-q theory of the instantaneous reactive power. They allow obtaining either unity power factor or perfect harmonic cancellation after compensation. Other two developments are based on the current components in the orthogonal rotating reference frame d-q with axis d in the direction of the voltage vector, which is specific of the id-iq method. This time, the compensation target is the total compensation through the perfect harmonic cancellation. The control algorithms were first modelized and tested by simulation under Matlab/Simulink. Then, experimental tests were conducted on a dSPACE platform based on DS1103 controller board for modern rapid prototyping. The compensating performance, in terms of harmonic distortion factor, unbalance factor, global power factor and displacement power factor, are analyzed for each situation. All the results prove that the desired compensation goals can be achieved through the conceived algorithms and the proposed practical implementation.
{"title":"Orthogonal reference frame based methods in three-wire active power line conditioners: Practical evaluation under unbalanced load and nonideal voltage conditions","authors":"M. Popescu, M. Dobriceanu, M. Linca, G. Oprea","doi":"10.1109/OPTIM.2014.6851003","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851003","url":null,"abstract":"This paper is concerned with the practical implementation of some orthogonal reference frame based methods in the control of a shunt three-phase three wire active power line conditioner in order to compensate unbalanced nonlinear loads under nonideal voltage conditions. The first two developments are based on the components of voltage and current space vectors in the orthogonal stationary reference frame associated with the p-q theory of the instantaneous reactive power. They allow obtaining either unity power factor or perfect harmonic cancellation after compensation. Other two developments are based on the current components in the orthogonal rotating reference frame d-q with axis d in the direction of the voltage vector, which is specific of the id-iq method. This time, the compensation target is the total compensation through the perfect harmonic cancellation. The control algorithms were first modelized and tested by simulation under Matlab/Simulink. Then, experimental tests were conducted on a dSPACE platform based on DS1103 controller board for modern rapid prototyping. The compensating performance, in terms of harmonic distortion factor, unbalance factor, global power factor and displacement power factor, are analyzed for each situation. All the results prove that the desired compensation goals can be achieved through the conceived algorithms and the proposed practical implementation.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127632340","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850895
D. Geisler, T. Leibfried
An optical deformation measurement system for buckling tests on Continuously Transposed Cable (CTC) using high-speed camera recordings and marker tracking is proposed. The aim of the buckling test setup is to analyze the mechanical strength of CTCs with respect to radially acting electromagnetic forces as they appear in power transformers. Therefore a CTC winding arrangement is fed by a short-circuit current while the deformation is recorded by the camera system. The verification of the new deformation measurement system is done by an independent system based on acceleration sensors. Especially operationally aged power transformers can be affected by high short circuit currents, resulting in serious damages on windings. Thus, the influence of ageing phenomena on the mechanical strength of CTCs like degradation of the paper insulation shall be investigated with the proposed system. Experimental results are proposed for a factory-new CTC and the influence of paper insulation on its stiffness is evaluated from the marker tracking results during the short circuit tests.
{"title":"Deformation measurement system for buckling tests on Continuously Transposed Cable using a high-speed camera","authors":"D. Geisler, T. Leibfried","doi":"10.1109/OPTIM.2014.6850895","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850895","url":null,"abstract":"An optical deformation measurement system for buckling tests on Continuously Transposed Cable (CTC) using high-speed camera recordings and marker tracking is proposed. The aim of the buckling test setup is to analyze the mechanical strength of CTCs with respect to radially acting electromagnetic forces as they appear in power transformers. Therefore a CTC winding arrangement is fed by a short-circuit current while the deformation is recorded by the camera system. The verification of the new deformation measurement system is done by an independent system based on acceleration sensors. Especially operationally aged power transformers can be affected by high short circuit currents, resulting in serious damages on windings. Thus, the influence of ageing phenomena on the mechanical strength of CTCs like degradation of the paper insulation shall be investigated with the proposed system. Experimental results are proposed for a factory-new CTC and the influence of paper insulation on its stiffness is evaluated from the marker tracking results during the short circuit tests.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122772001","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850918
O. Ivanov, M. Gavrilas, B. Neagu
A fundamental component of a smart grid is transmission and distribution system monitoring and control. Accurate load, power flow and voltage estimation is required for real time generation capacity dispatching and congestion management in wide area power systems or in networks with distributed generation. In electrical networks, bus voltage levels, load, generation and branch power flows are interdependent, and ones can be determined if others are known. This is a problem that can be solved using the approximation capabilities of artificial neural networks (ANNs). This paper explores the possibility of replacing the classic estimation algorithms in voltage and power flow estimation with ANN approaches, using available data from the Romanian power system.
{"title":"Intelligent monitoring and control in transmission and distribution networks","authors":"O. Ivanov, M. Gavrilas, B. Neagu","doi":"10.1109/OPTIM.2014.6850918","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850918","url":null,"abstract":"A fundamental component of a smart grid is transmission and distribution system monitoring and control. Accurate load, power flow and voltage estimation is required for real time generation capacity dispatching and congestion management in wide area power systems or in networks with distributed generation. In electrical networks, bus voltage levels, load, generation and branch power flows are interdependent, and ones can be determined if others are known. This is a problem that can be solved using the approximation capabilities of artificial neural networks (ANNs). This paper explores the possibility of replacing the classic estimation algorithms in voltage and power flow estimation with ANN approaches, using available data from the Romanian power system.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123282489","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6851040
Abdülhamit Aydın, Ş. Patat, Ahmet Ulgen, H. Şahan, Fatma, K. Dokan, S. Veziroglu
In the present study, α-Co(OH)2 was prepared by a potentiostatic deposition process at -1.0V (vs. Ag/AgCl) onto a nickel electrode by using a aqueous solution of 0.1 M Co(NO3)2. The structure and surface morphology of the obtained the α-Co(OH)2 were studied by using X-ray diffraction analysis and scanning electron microscopy. XRD data and the scanning electron microscopy images showed that the as-deposited films have an interlaced nanosheet-like surface morphology and possess a regular nanostructure with hexagonal arrays of pores of nanometer dimension and extended periodicity The capacitive characteristics of the α-Co(OH)2 electrodes were investigated by means of cyclic voltammetry and constant current charge-discharge cycling in 1 M KOH electrolyte with and without addition of 0.05% Triton X-100. Galvanostatic charge-discharge curves showed that the capacitance was increased from 720 F g-1 to 804 F g-1 and the capacitance retention from 63% to 76% after 500 charge/discharge cycles by addition of 0.05% Triton X-100 surface active materials to 1M KOH electrolyte solution. This indicates that the surfactant addition is a promising process for increasing capacitance of the α-Co(OH)2 electrodes.
本研究以0.1 M Co(NO3)2水溶液为溶剂，在-1.0V (vs. Ag/AgCl)电压下，采用恒电位沉积法制备α-Co(OH)2。用x射线衍射分析和扫描电镜研究了α-Co(OH)2的结构和表面形貌。XRD数据和扫描电镜图像表明，沉积的α-Co(OH)2电极具有交错的纳米片状表面形貌，具有规则的纳米结构，具有纳米尺度的六方孔阵列和扩展的周期性。通过循环伏安法和在1 M KOH电解质中添加0.05% Triton X-100和不添加0.05% Triton X-100的恒流充放电循环，研究了α-Co(OH)2电极的电容特性。恒流充放电曲线表明，在1M KOH溶液中加入0.05% Triton X-100表面活性物质，经过500次充放电循环后，电容从720 F -1增加到804 F -1，电容保持率从63%提高到76%。这表明表面活性剂的加入是提高α-Co(OH)2电极电容的有效方法。
{"title":"Synthesis, characterization and improvement of α-Co(OH)2 for supercapacitor applications","authors":"Abdülhamit Aydın, Ş. Patat, Ahmet Ulgen, H. Şahan, Fatma, K. Dokan, S. Veziroglu","doi":"10.1109/OPTIM.2014.6851040","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851040","url":null,"abstract":"In the present study, α-Co(OH)2 was prepared by a potentiostatic deposition process at -1.0V (vs. Ag/AgCl) onto a nickel electrode by using a aqueous solution of 0.1 M Co(NO3)2. The structure and surface morphology of the obtained the α-Co(OH)2 were studied by using X-ray diffraction analysis and scanning electron microscopy. XRD data and the scanning electron microscopy images showed that the as-deposited films have an interlaced nanosheet-like surface morphology and possess a regular nanostructure with hexagonal arrays of pores of nanometer dimension and extended periodicity The capacitive characteristics of the α-Co(OH)2 electrodes were investigated by means of cyclic voltammetry and constant current charge-discharge cycling in 1 M KOH electrolyte with and without addition of 0.05% Triton X-100. Galvanostatic charge-discharge curves showed that the capacitance was increased from 720 F g-1 to 804 F g-1 and the capacitance retention from 63% to 76% after 500 charge/discharge cycles by addition of 0.05% Triton X-100 surface active materials to 1M KOH electrolyte solution. This indicates that the surfactant addition is a promising process for increasing capacitance of the α-Co(OH)2 electrodes.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124678233","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850906
Florina Scarlatache, G. Grigoraș
Due to the growing integration of distributed generation sources (DG) into electrical power systems, it is important to acquire knowledge concerning their operation characteristics. An important aspect is the volatility nature of these sources, especially wind sources. Thus, it is necessary that the electrical system in which this type of DG sources are included, be able to compensate each variation in the electrical energy production, to maintain all the time a balance between production and consumption, in compliance with requirements imposed by the system operator. This study presents the influence of coordination of the wind and hydro power plants, on power losses in electric power systems, based on the correlation between electrical energy productions of these. The results show the effectiveness of the proposed method.
{"title":"Optimal coordination of wind and hydro power plants in power systems","authors":"Florina Scarlatache, G. Grigoraș","doi":"10.1109/OPTIM.2014.6850906","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850906","url":null,"abstract":"Due to the growing integration of distributed generation sources (DG) into electrical power systems, it is important to acquire knowledge concerning their operation characteristics. An important aspect is the volatility nature of these sources, especially wind sources. Thus, it is necessary that the electrical system in which this type of DG sources are included, be able to compensate each variation in the electrical energy production, to maintain all the time a balance between production and consumption, in compliance with requirements imposed by the system operator. This study presents the influence of coordination of the wind and hydro power plants, on power losses in electric power systems, based on the correlation between electrical energy productions of these. The results show the effectiveness of the proposed method.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133864763","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850939
I. Edelman, O. Ivanova, Yan V. Zubavichus, N. N. Trofimova, V. Zaikovskiy, Alla Artemenko, Jacques Curély, J. Kliava
Heat treatment of borate glasses co-doped with low contents of iron and larger radius elements: Dy, Tb, Gd, Ho, Er, Y and Bi results in formation of magnetic nanoparticles, radically changing their physical properties. Transmission electron microscopy and synchrotron radiation-based techniques: XRD, EXAFS, XANES and SAXS, show a broad distribution of nanoparticle sizes with characteristic depending on the treatment regime; a crystalline structure of these nanoparticles is detected in heat treated samples. Magnetic circular dichroism (MCD) studies of samples subjected to heat treatment as well as of maghemite, magnetite and iron garnet allow to unambiguously assigning the nanoparticle structure to maghemite. Different features observed in the MCD spectra are related to different electron transitions in Fe3+ ions gathered in the nanoparticles. Variable-temperature electron magnetic resonance (EMR) studies confirm the formation of magnetic nanoparticles and the identification of their nature. Computer simulations of the EMR spectra corroborate the broad distribution of nanoparticle sizes found by “direct” techniques.
{"title":"Magnetic nanoparticles in borate glasses: Identification and sizing","authors":"I. Edelman, O. Ivanova, Yan V. Zubavichus, N. N. Trofimova, V. Zaikovskiy, Alla Artemenko, Jacques Curély, J. Kliava","doi":"10.1109/OPTIM.2014.6850939","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850939","url":null,"abstract":"Heat treatment of borate glasses co-doped with low contents of iron and larger radius elements: Dy, Tb, Gd, Ho, Er, Y and Bi results in formation of magnetic nanoparticles, radically changing their physical properties. Transmission electron microscopy and synchrotron radiation-based techniques: XRD, EXAFS, XANES and SAXS, show a broad distribution of nanoparticle sizes with characteristic depending on the treatment regime; a crystalline structure of these nanoparticles is detected in heat treated samples. Magnetic circular dichroism (MCD) studies of samples subjected to heat treatment as well as of maghemite, magnetite and iron garnet allow to unambiguously assigning the nanoparticle structure to maghemite. Different features observed in the MCD spectra are related to different electron transitions in Fe3+ ions gathered in the nanoparticles. Variable-temperature electron magnetic resonance (EMR) studies confirm the formation of magnetic nanoparticles and the identification of their nature. Computer simulations of the EMR spectra corroborate the broad distribution of nanoparticle sizes found by “direct” techniques.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133643124","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850872
Markus Dirnberger, R. Retana, S. Hartmann, H. Herzog
The reduction of CO2 emissions and fuel consumption is a continuous challenge towards the optimization of hybrid and electric vehicles. The approach in this paper is to use the claw pole alternator as boost-recuperation-machine (BRM), to realize a mild hybrid electrical vehicle. The investigated parameters are the control strategy and the pulley ratio of the BRM. These parameters are easily adjustable and influence the fuel consumption in the range of several ml/100km. For such minimal fuel savings an appropriate method is needed, which differs fundamentally to full hybrid optimization methods. To assess such small values the State-of-Charge (SOC) in the battery must be kept neutral during a driving cycle. Besides the SOC-neutral driving and a fast convergence behavior is essential. Consequently, several methods for optimization are considered, compared and improved. To improve the optimization progress optimization loops are used to analyze and optimize the system. Finally, the developed method is applied on a boost-recuperation-system (BRS) to minimize the fuel consumption.
{"title":"Optimization loops as method for analysis of boost recuperation systems","authors":"Markus Dirnberger, R. Retana, S. Hartmann, H. Herzog","doi":"10.1109/OPTIM.2014.6850872","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850872","url":null,"abstract":"The reduction of CO2 emissions and fuel consumption is a continuous challenge towards the optimization of hybrid and electric vehicles. The approach in this paper is to use the claw pole alternator as boost-recuperation-machine (BRM), to realize a mild hybrid electrical vehicle. The investigated parameters are the control strategy and the pulley ratio of the BRM. These parameters are easily adjustable and influence the fuel consumption in the range of several ml/100km. For such minimal fuel savings an appropriate method is needed, which differs fundamentally to full hybrid optimization methods. To assess such small values the State-of-Charge (SOC) in the battery must be kept neutral during a driving cycle. Besides the SOC-neutral driving and a fast convergence behavior is essential. Consequently, several methods for optimization are considered, compared and improved. To improve the optimization progress optimization loops are used to analyze and optimize the system. Finally, the developed method is applied on a boost-recuperation-system (BRS) to minimize the fuel consumption.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114243707","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6851002
C. Andrei, Tobias Kauder, Jan Karthaus, M. Hombitzer, R. Appunn, K. Hameyer
Wind turbines (WTs) are energy conversion systems with a very complex electromechanical structure, consisting of highly interconnected subsystems, which are constantly exposed to dynamic electrical and mechanical stress. In order to improve their technical and economic efficiency, new alternative drive train concepts are being sought. This paper proposes a WT drive train with multiple high-speed generators. Different electrical machines are investigated analytically and the permanent magnet synchronous machine with V-shaped internal magnets (VI-PMSM) is chosen as the most suited topology for this application. A simple MATLAB Simulink model is developed to validate the proposed WT configuration in terms of efficiency gain. Furthermore, the operational behavior of the VI-PMSM is improved by means of sinusoidal rotor field poles.
{"title":"Improved rotor pole geometry of a PMSM for wind turbine applications with multiple high-speed generators","authors":"C. Andrei, Tobias Kauder, Jan Karthaus, M. Hombitzer, R. Appunn, K. Hameyer","doi":"10.1109/OPTIM.2014.6851002","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851002","url":null,"abstract":"Wind turbines (WTs) are energy conversion systems with a very complex electromechanical structure, consisting of highly interconnected subsystems, which are constantly exposed to dynamic electrical and mechanical stress. In order to improve their technical and economic efficiency, new alternative drive train concepts are being sought. This paper proposes a WT drive train with multiple high-speed generators. Different electrical machines are investigated analytically and the permanent magnet synchronous machine with V-shaped internal magnets (VI-PMSM) is chosen as the most suited topology for this application. A simple MATLAB Simulink model is developed to validate the proposed WT configuration in terms of efficiency gain. Furthermore, the operational behavior of the VI-PMSM is improved by means of sinusoidal rotor field poles.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115009148","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}
Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850952
A. Stanciu, A. Craciun
Nowadays FPGAs have been used in a wide range of electronic devices in many types of industry, from simple switches and motor controllers to complex factories, medical apparatus or building automation and control systems, and not only in device prototyping. Besides the advantages of the increasing use of FPGA devices such as: time to market, cost reduction, reliability, programmability or high performance designs, security issues disadvantages also start to appear. During the manufacturing flow, the design passes through many processes of different manufacturers: IP Vendor, System Integrator and Manufacturer. During this time the design is exposed to hardware threats. Therefore FPGA designs need to be protected against hardware attacks. Digital circuits, like Ring Oscillators (ROs), which emphasize process variations, that appear during the physical execution of FPGA are a promising primitive for FPGA security. In this paper, we present and analyze the experimental results of an FPGA security technique, namely generating a unique identifier, based on a ROs security primitive.
{"title":"Generating an unique identifier for FPGA devices","authors":"A. Stanciu, A. Craciun","doi":"10.1109/OPTIM.2014.6850952","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850952","url":null,"abstract":"Nowadays FPGAs have been used in a wide range of electronic devices in many types of industry, from simple switches and motor controllers to complex factories, medical apparatus or building automation and control systems, and not only in device prototyping. Besides the advantages of the increasing use of FPGA devices such as: time to market, cost reduction, reliability, programmability or high performance designs, security issues disadvantages also start to appear. During the manufacturing flow, the design passes through many processes of different manufacturers: IP Vendor, System Integrator and Manufacturer. During this time the design is exposed to hardware threats. Therefore FPGA designs need to be protected against hardware attacks. Digital circuits, like Ring Oscillators (ROs), which emphasize process variations, that appear during the physical execution of FPGA are a promising primitive for FPGA security. In this paper, we present and analyze the experimental results of an FPGA security technique, namely generating a unique identifier, based on a ROs security primitive.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"265 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116488956","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}
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