Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6850927
J. Antonino-Daviu, L. Dunai
This paper deepens into several issues derived from educational experiences lived in a Spanish University, while teaching an Electric Engineering-related subject - `Electrical Technology' - in a group that was primarily based on foreign students. This subject covers a wide range of aspects related to the components, conception and design of electrical industrial installations. The work compiles the different difficulties faced by the instructor during the teaching process in such group. These difficulties are mainly due to the differences in students' technical backgrounds, multi-cultural origin, diversity in the electric regulations of different countries and different importance of the subject for each individual. The paper proposes several education strategies to overcome some of these difficulties, namely: integration of ICTs in the teaching process, elaboration of multimedia didactic material, development of specific assessment systems and promotion of individual tutoring. Preliminary implantation of some of these actions has led to an improvement of the students' performance that is reflected through the higher attendance to the lectures, enhancement of the opinion towards the subject and increment in the grades obtained by the students.
{"title":"Teaching electrical and electronic engineering to multi-cultural groups","authors":"J. Antonino-Daviu, L. Dunai","doi":"10.1109/OPTIM.2014.6850927","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850927","url":null,"abstract":"This paper deepens into several issues derived from educational experiences lived in a Spanish University, while teaching an Electric Engineering-related subject - `Electrical Technology' - in a group that was primarily based on foreign students. This subject covers a wide range of aspects related to the components, conception and design of electrical industrial installations. The work compiles the different difficulties faced by the instructor during the teaching process in such group. These difficulties are mainly due to the differences in students' technical backgrounds, multi-cultural origin, diversity in the electric regulations of different countries and different importance of the subject for each individual. The paper proposes several education strategies to overcome some of these difficulties, namely: integration of ICTs in the teaching process, elaboration of multimedia didactic material, development of specific assessment systems and promotion of individual tutoring. Preliminary implantation of some of these actions has led to an improvement of the students' performance that is reflected through the higher attendance to the lectures, enhancement of the opinion towards the subject and increment in the grades obtained by the students.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"146 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":"121640739","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.2014.6851016
L. Tutelea, I. Boldea, S. Deaconu
The parameter identification of a dual three phase's stator winding induction machine is approached in this paper by the genetic optimal algorithm. The estimated parameter are: the voltage ratio between main and auxiliary winding, the main winding resistance and leakage reactance, the cage rotor resistance and reactance, the coupling leakage reactance between main and auxiliary winding, the magnetization non saturated reactance, equivalent iron loss resistance and mechanical losses including their variation with speed. The parameter are calculated from standard no load and short circuit test performed on both stator winding, by minimization the sum of squared errors between measured and computed currents, active power and reactive power in several points. The proposed method reduces the measurement error influence on the estimated parameters and for leakage inductances that slightly depend on the current could be also considered the best constant values approximation.
{"title":"Parameter optimal identification of dual three phase stator winding induction machine","authors":"L. Tutelea, I. Boldea, S. Deaconu","doi":"10.1109/OPTIM.2014.6851016","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851016","url":null,"abstract":"The parameter identification of a dual three phase's stator winding induction machine is approached in this paper by the genetic optimal algorithm. The estimated parameter are: the voltage ratio between main and auxiliary winding, the main winding resistance and leakage reactance, the cage rotor resistance and reactance, the coupling leakage reactance between main and auxiliary winding, the magnetization non saturated reactance, equivalent iron loss resistance and mechanical losses including their variation with speed. The parameter are calculated from standard no load and short circuit test performed on both stator winding, by minimization the sum of squared errors between measured and computed currents, active power and reactive power in several points. The proposed method reduces the measurement error influence on the estimated parameters and for leakage inductances that slightly depend on the current could be also considered the best constant values approximation.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"35 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":"115144957","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.2014.6851020
I. Torac
The paper deals with standard three phase low voltage squirrel cage motors in variable speed drives. The aim is to investigate the possibility of improving the machines parameters at low speed. The considered industrial motors are the existing ones, having the rated power between 0.55 kW and 37 kW and 4 and 6 pole. The paper presents also an example emphasizing the possibility of improving the machine parameters using a “low tool cost” solution.
{"title":"A few aspects about the squirrel cage induction motors in variable speed drives","authors":"I. Torac","doi":"10.1109/OPTIM.2014.6851020","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851020","url":null,"abstract":"The paper deals with standard three phase low voltage squirrel cage motors in variable speed drives. The aim is to investigate the possibility of improving the machines parameters at low speed. The considered industrial motors are the existing ones, having the rated power between 0.55 kW and 37 kW and 4 and 6 pole. The paper presents also an example emphasizing the possibility of improving the machine parameters using a “low tool cost” solution.","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":"116571428","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.2014.6850946
B. Codres, M. Gaiceanu, R. Șolea, Cristinel Eni
This paper propose a model predictive control (MPC) of a three phase Permanent Magnet Synchronous Motor (PMSM). The ARX model, used to compute the predictive control signal, is obtained using an online identification procedure. The MPC is then compared with a conventional approach, i.e. Proportional Integral (PI) speed controller. The effectiveness of the approach is shown in the simulation results done with Simulink.
{"title":"Model predictive speed control of Permanent Magnet Synchronous Motor","authors":"B. Codres, M. Gaiceanu, R. Șolea, Cristinel Eni","doi":"10.1109/OPTIM.2014.6850946","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850946","url":null,"abstract":"This paper propose a model predictive control (MPC) of a three phase Permanent Magnet Synchronous Motor (PMSM). The ARX model, used to compute the predictive control signal, is obtained using an online identification procedure. The MPC is then compared with a conventional approach, i.e. Proportional Integral (PI) speed controller. The effectiveness of the approach is shown in the simulation results done with Simulink.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"50 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":"114707435","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.2014.6850987
A. Fratu, M. Fratu
In this paper, based on original idea, the authors propose a new strategy to robot programming using imitation paradigm. To program the desired motion sequence for the physical robot, one captures the motion reference paths from her virtual robot model and maps these to the joint settings of the physical robot. Motion imitation requires transfer of a dynamical signature of a movement of the virtual robot to the physical robot, i.e. the robots should be able to encode and reproduce a particular path as one with a specific velocity and/or an acceleration profile. Furthermore, the virtual robot must cover all possible contexts in which the physical robot will need to generate similar motions in unseen context.
{"title":"Imitation-based motion programming for robotic manipulators","authors":"A. Fratu, M. Fratu","doi":"10.1109/OPTIM.2014.6850987","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850987","url":null,"abstract":"In this paper, based on original idea, the authors propose a new strategy to robot programming using imitation paradigm. To program the desired motion sequence for the physical robot, one captures the motion reference paths from her virtual robot model and maps these to the joint settings of the physical robot. Motion imitation requires transfer of a dynamical signature of a movement of the virtual robot to the physical robot, i.e. the robots should be able to encode and reproduce a particular path as one with a specific velocity and/or an acceleration profile. Furthermore, the virtual robot must cover all possible contexts in which the physical robot will need to generate similar motions in unseen context.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"21 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":"123718524","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.2014.6850914
L. Aciu, P. Ogrutan, G. Nicolae, C. Ursachi
Radon concentration measurements in air with an Electronic Radon Gas Monitor in a location close to the telecommunication antenna gave unacceptable values. This paper presents several sets of measurements of electric field at low and high frequency and Radon concentrations in studied location and at the reference location. The Radon concentration measurements were performed both with electronic devices and with the alpha track detectors. To determine susceptibility Radon detector, tests were carried out for galvanic and radiated disturbance coupling. Radiated Immunity tests were made in a TEM cell in the range 850MHz-900MHz, according to IEC 61000-4-6 in the frequency range 150kHz-80MHz. Tests revealed errors of measuring the concentration of Radon gas in the presence of disturbances.
{"title":"Errors in Electronic Radon Gas Monitors due to electromagnetic interferences","authors":"L. Aciu, P. Ogrutan, G. Nicolae, C. Ursachi","doi":"10.1109/OPTIM.2014.6850914","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850914","url":null,"abstract":"Radon concentration measurements in air with an Electronic Radon Gas Monitor in a location close to the telecommunication antenna gave unacceptable values. This paper presents several sets of measurements of electric field at low and high frequency and Radon concentrations in studied location and at the reference location. The Radon concentration measurements were performed both with electronic devices and with the alpha track detectors. To determine susceptibility Radon detector, tests were carried out for galvanic and radiated disturbance coupling. Radiated Immunity tests were made in a TEM cell in the range 850MHz-900MHz, according to IEC 61000-4-6 in the frequency range 150kHz-80MHz. Tests revealed errors of measuring the concentration of Radon gas in the presence of disturbances.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"12 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":"124544624","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.2014.6850947
M. Palmieri, M. Perta, F. Cupertino, G. Pellegrino
This paper analyzes the impact of the numbers of stator slots and rotor layers on the optimal design of synchronous reluctance (SyR) machines. Eighteen SyR machine examples have been designed by means of a multi-objective optimization algorithm and finite element analysis so to maximize torque and minimize torque ripple. Twelve, twenty-four and forty-eight slot stators are considered, associated to rotors with four-poles and one to six flux barriers per pole. The results of the comparative analysis show that high numbers of slots and layers are beneficial for maximizing the torque and the power factor, and that torque ripple and iron loss minimization require precise matches between the slots and the layers, which are not necessarily the same for the two purposes. Finally, for some slot/layer combinations the optimization algorithm produces nonconventional barrier distributions, very promising is some cases. A fast finite element evaluation is used for the evaluation of thousands of candidate machines during the optimization, whereas an accurate transient with motion finite element analysis stage is used for the off-line characterization of the final designs.
{"title":"Effect of the numbers of slots and barriers on the optimal design of synchronous reluctance machines","authors":"M. Palmieri, M. Perta, F. Cupertino, G. Pellegrino","doi":"10.1109/OPTIM.2014.6850947","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850947","url":null,"abstract":"This paper analyzes the impact of the numbers of stator slots and rotor layers on the optimal design of synchronous reluctance (SyR) machines. Eighteen SyR machine examples have been designed by means of a multi-objective optimization algorithm and finite element analysis so to maximize torque and minimize torque ripple. Twelve, twenty-four and forty-eight slot stators are considered, associated to rotors with four-poles and one to six flux barriers per pole. The results of the comparative analysis show that high numbers of slots and layers are beneficial for maximizing the torque and the power factor, and that torque ripple and iron loss minimization require precise matches between the slots and the layers, which are not necessarily the same for the two purposes. Finally, for some slot/layer combinations the optimization algorithm produces nonconventional barrier distributions, very promising is some cases. A fast finite element evaluation is used for the evaluation of thousands of candidate machines during the optimization, whereas an accurate transient with motion finite element analysis stage is used for the off-line characterization of the final designs.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"3 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":"128100924","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.2014.6850945
S. Daraban, D. Petreus, C. Orian
This paper will present the importance of control topology for power systems used in wind energy conversion systems (WECS). The efficiency and the method of sizing the components of the system are different from one control method to the other. Also a control method is proposed and analysed by using a power factor correction (PFC) controller in a novel configuration suitable for modular design. By using modular design, the same converter can be used in multiple applications. A wind model is used in order to better simulate the behaviour of the system and test the MPPT algorithms. The experimental results validate the theoretical and simulated ones.
{"title":"Control topology for high efficiency small scale wind energy conversion systems","authors":"S. Daraban, D. Petreus, C. Orian","doi":"10.1109/OPTIM.2014.6850945","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850945","url":null,"abstract":"This paper will present the importance of control topology for power systems used in wind energy conversion systems (WECS). The efficiency and the method of sizing the components of the system are different from one control method to the other. Also a control method is proposed and analysed by using a power factor correction (PFC) controller in a novel configuration suitable for modular design. By using modular design, the same converter can be used in multiple applications. A wind model is used in order to better simulate the behaviour of the system and test the MPPT algorithms. The experimental results validate the theoretical and simulated ones.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"24 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":"130449366","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.2014.6851005
C. Kopacz, S. Spataru, D. Sera, T. Kerekes
This paper presents the concept and operating principles of a low-cost and flexible monitoring system for PV plants. Compared to classical solutions which can require dedicated hardware and/or specialized data logging systems, the monitoring system we propose allows parallel monitoring of PV plants with different architectures and locations by taking advantage of the intrinsic monitoring capabilities of the inverters and their internet connectivity. The backbone of the system is a software system capable of collecting production measurements and current-voltage (I-V) characteristic curve measurements from the inverters within each PV plant. The monitoring software stores the PV measurements in a data warehouse optimized for managing and data mining large amounts of data, from where it can be later visualized, analyzed and exported. By combining PV production measurements data with I-V curve measurements the diagnostic and condition monitoring capabilities of the PV system can be greatly enhanced. The practical implementation and operation of the monitoring system is demonstrated with a study case system deployed at Aalborg University.
{"title":"Remote and centralized monitoring of PV power plants","authors":"C. Kopacz, S. Spataru, D. Sera, T. Kerekes","doi":"10.1109/OPTIM.2014.6851005","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851005","url":null,"abstract":"This paper presents the concept and operating principles of a low-cost and flexible monitoring system for PV plants. Compared to classical solutions which can require dedicated hardware and/or specialized data logging systems, the monitoring system we propose allows parallel monitoring of PV plants with different architectures and locations by taking advantage of the intrinsic monitoring capabilities of the inverters and their internet connectivity. The backbone of the system is a software system capable of collecting production measurements and current-voltage (I-V) characteristic curve measurements from the inverters within each PV plant. The monitoring software stores the PV measurements in a data warehouse optimized for managing and data mining large amounts of data, from where it can be later visualized, analyzed and exported. By combining PV production measurements data with I-V curve measurements the diagnostic and condition monitoring capabilities of the PV system can be greatly enhanced. The practical implementation and operation of the monitoring system is demonstrated with a study case system deployed at Aalborg University.","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":"130656203","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.2014.6850978
V. Mariappan, S. Srinivas, V. Narayanan
This paper presents the development of a simple user defined model for predicting the fuel saving benefits with brake energy recovery methods of a conventional vehicle. The need of detailed input to be described for the expensive commercial tools are avoided by the proposed simulator. The simulator developed in the paper is employed to predict fuel economy with Fig. 3 EMAS & Fig. 4 RMAS whose models are simulated and experimentally verified. With EMAS fuel saving benefits is found to be 1.4% while with RMAS it is 2.82% for the standard Fig. 6 NEDC considered in the present study.
{"title":"A simple model to predict fuel saving benefits with brake energy recovery methods of conventional vehicle regenerative braking system","authors":"V. Mariappan, S. Srinivas, V. Narayanan","doi":"10.1109/OPTIM.2014.6850978","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850978","url":null,"abstract":"This paper presents the development of a simple user defined model for predicting the fuel saving benefits with brake energy recovery methods of a conventional vehicle. The need of detailed input to be described for the expensive commercial tools are avoided by the proposed simulator. The simulator developed in the paper is employed to predict fuel economy with Fig. 3 EMAS & Fig. 4 RMAS whose models are simulated and experimentally verified. With EMAS fuel saving benefits is found to be 1.4% while with RMAS it is 2.82% for the standard Fig. 6 NEDC considered in the present study.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"2 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":"130987031","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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