Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130206
Š. Kočan, P. Rafajdus, M. Sumega
This paper deals with an analysis of the air gap size effect on the other parameters of high speed Switched Reluctance Motor (SRM) as average static torque, torque ripple, winding losses, iron losses, mechanical losses, output power and efficiency. At the beginning, there is introduction about state of the art of high-speed machines. The following section presents the state of the motor design before this analysis. Numerical and analytical models and design procedures are used. Subsequently, these procedures are presented. Finally, the obtained results are presented and commented.
{"title":"Effect of Air Gap Size on Parameters of High Speed Switched Reluctance Motor","authors":"Š. Kočan, P. Rafajdus, M. Sumega","doi":"10.1109/ELEKTRO49696.2020.9130206","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130206","url":null,"abstract":"This paper deals with an analysis of the air gap size effect on the other parameters of high speed Switched Reluctance Motor (SRM) as average static torque, torque ripple, winding losses, iron losses, mechanical losses, output power and efficiency. At the beginning, there is introduction about state of the art of high-speed machines. The following section presents the state of the motor design before this analysis. Numerical and analytical models and design procedures are used. Subsequently, these procedures are presented. Finally, the obtained results are presented and commented.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131057851","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130195
M. Goraus, I. Martincek, P. Urbancová, D. Pudiš, D. Kacik
In this paper, we present new concept of three-dimensional (3D) Fabry-Perot resonator (FPR) based on a novel IP-Dip polymer. For FPR structure fabrication a 3D laser lithography technique with non-linear two-photon polymerization (TPP) was used. Using single-step fabrication technique based on direct laser writing (DLW), we prepared 3D FPR structure, which was directly integrated at the end of a single mode optical fiber as an effective sensing element for lab-on-fiber (LOF) devices. The proposed FPR consists of IP-Dip structure with 35 μm air cavity. The parameters of FPR structure were numerically proposed and reflection spectrum was simulated by transfer matrix method (TMM). Reflection properties of FPR structure were measured using optical spectrum analyzer (OSA) in near-infrared region around wavelength of 1550 nm. The quality and morphological properties of fabricated FPR structure were analyzed by scanning electron microscope (SEM).
{"title":"Polymer lab-on-fiber probe based on Fabry-Perot resonator","authors":"M. Goraus, I. Martincek, P. Urbancová, D. Pudiš, D. Kacik","doi":"10.1109/ELEKTRO49696.2020.9130195","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130195","url":null,"abstract":"In this paper, we present new concept of three-dimensional (3D) Fabry-Perot resonator (FPR) based on a novel IP-Dip polymer. For FPR structure fabrication a 3D laser lithography technique with non-linear two-photon polymerization (TPP) was used. Using single-step fabrication technique based on direct laser writing (DLW), we prepared 3D FPR structure, which was directly integrated at the end of a single mode optical fiber as an effective sensing element for lab-on-fiber (LOF) devices. The proposed FPR consists of IP-Dip structure with 35 μm air cavity. The parameters of FPR structure were numerically proposed and reflection spectrum was simulated by transfer matrix method (TMM). Reflection properties of FPR structure were measured using optical spectrum analyzer (OSA) in near-infrared region around wavelength of 1550 nm. The quality and morphological properties of fabricated FPR structure were analyzed by scanning electron microscope (SEM).","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131181469","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130279
Peter Brnčal, M. Gutten, D. Korenčiak, M. Šebok, T. Kołtunowicz, P. Żukowski
Paper presents experimental diagnostics of insulating system oil-paper for power transformers, mainly by progressive frequency method – dielectric spectroscopy. The introduction of the article is described the base analysing for measurement insulating elements (oil and paper) of power transformers. The next part of article is described application of dielectric frequency domain spectroscopy (FDS) method for high-voltage power transformers. Diagnostic methods are used for measurement of insulating state of high-voltage devices with insulating parts as oil-paper. It was present that the values of these measuring results are highly impacted by the temperature of operating during the experimental diagnostics. Conductivity and moisture between dielectric transformer paper and insulating oil in an dielectric system are highly dependent from internal and ambient temperature. In the final section the article are presented experimental values of the diagnostic analysis for an operating oil traction transformer at different internal temperatures and conditions (with oil filling and without).
{"title":"Analysing of insulating system oil-paper of power transformers by frequency dielectric spectroscopy","authors":"Peter Brnčal, M. Gutten, D. Korenčiak, M. Šebok, T. Kołtunowicz, P. Żukowski","doi":"10.1109/ELEKTRO49696.2020.9130279","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130279","url":null,"abstract":"Paper presents experimental diagnostics of insulating system oil-paper for power transformers, mainly by progressive frequency method – dielectric spectroscopy. The introduction of the article is described the base analysing for measurement insulating elements (oil and paper) of power transformers. The next part of article is described application of dielectric frequency domain spectroscopy (FDS) method for high-voltage power transformers. Diagnostic methods are used for measurement of insulating state of high-voltage devices with insulating parts as oil-paper. It was present that the values of these measuring results are highly impacted by the temperature of operating during the experimental diagnostics. Conductivity and moisture between dielectric transformer paper and insulating oil in an dielectric system are highly dependent from internal and ambient temperature. In the final section the article are presented experimental values of the diagnostic analysis for an operating oil traction transformer at different internal temperatures and conditions (with oil filling and without).","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133803203","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130203
M. Janek, V. Ladygin, Semen Mikhailovich Piyadin
Detector efficiencies are investigated in dp breakup experiment at intermediate energies using collected data from methodical experiment and results obtained by phase space simulation in the ROOT and GEANT4 packages. Two configurations of detectors were used in order to investigate detector’s efficiency of particle registration. Perpendicular configuration is used to investigate detector efficiency as a function of a depth in E - scintillator. Longitudinal configuration is used to investigate possible variation of detector efficiency due to possible misalignment. Reasonable agreement between experimental and modeled results is obtained.
{"title":"Properties of detectors used in dp breakup experiment investigated at intermediate energies","authors":"M. Janek, V. Ladygin, Semen Mikhailovich Piyadin","doi":"10.1109/ELEKTRO49696.2020.9130203","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130203","url":null,"abstract":"Detector efficiencies are investigated in dp breakup experiment at intermediate energies using collected data from methodical experiment and results obtained by phase space simulation in the ROOT and GEANT4 packages. Two configurations of detectors were used in order to investigate detector’s efficiency of particle registration. Perpendicular configuration is used to investigate detector efficiency as a function of a depth in E - scintillator. Longitudinal configuration is used to investigate possible variation of detector efficiency due to possible misalignment. Reasonable agreement between experimental and modeled results is obtained.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134057660","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130310
N. Yesenina, I. V. Galitsyna
The present paper considers the professional activities modification of foreign language teachers at engineering universities within ICT-based environment, including the new demands for their competencies. The modular content and methodical aspects of a professional development course "ICT in FL training for electrical engineering students" is presented.
{"title":"ICT-competency Training for Foreign Language Teachers of Electrical Engineering Curricula","authors":"N. Yesenina, I. V. Galitsyna","doi":"10.1109/ELEKTRO49696.2020.9130310","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130310","url":null,"abstract":"The present paper considers the professional activities modification of foreign language teachers at engineering universities within ICT-based environment, including the new demands for their competencies. The modular content and methodical aspects of a professional development course \"ICT in FL training for electrical engineering students\" is presented.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132042418","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130347
N. Dubauskienė, A. Valinevicius, D. Andriukaitis, M. Zilys, D. Navikas, V. Markevičius, A. Merfeldas
Teaching engineering today is a challenging task due to many issues, mainly the dynamic nature of the subject, the scope of the learning material, and the information overload in lives of students. The expectations of a quality graduate is that not only that he or she will have good fundamental knowledge of the subject, but so called „soft" competencies and eagerness to develop the needed skills independently. Traditional lectures fall short of providing the desired outcome, especially in the environment of reducing study years and increasing the number of working, even full time, students. Some of these points can be successfully addressed by using innovative teaching methods, including Problem Based Learning and Case Study. These methods have been implemented in teaching a variety of subjects, and their proponents have a strong base for advocating even wider use, but even those who are convinced of their advantages are reluctant to turn their lectures in to problem solving or case analysis. This is due to a number of reasons, including institutional and environmental ones, but at least some of it is the obstacle of needing to write a problem or a case. Readymade cases and problems are not in abundance and must be tailored to each class anyway. In order to achieve the desired outcome these must be, in simpler terms, good stories, and even the best engineering teachers cannot always be expected to write well, especially in such a challenging subject. This paper aims to describe the process of creating an interesting, useful and motivating problem or case for use in engineering classes and providing the tools for teachers to include more problem solving or case analysis in their teaching process. This process is based on the experience of using Problem Based Learning and Case Study with second year materials engineering students for teaching basic electronics. The use of these learning methods were met with interest and enthusiasm from students, and the outcomes strongly depended on the quality of problems and cases used.
{"title":"Innovative Teaching Methods for Engineering Students","authors":"N. Dubauskienė, A. Valinevicius, D. Andriukaitis, M. Zilys, D. Navikas, V. Markevičius, A. Merfeldas","doi":"10.1109/ELEKTRO49696.2020.9130347","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130347","url":null,"abstract":"Teaching engineering today is a challenging task due to many issues, mainly the dynamic nature of the subject, the scope of the learning material, and the information overload in lives of students. The expectations of a quality graduate is that not only that he or she will have good fundamental knowledge of the subject, but so called „soft\" competencies and eagerness to develop the needed skills independently. Traditional lectures fall short of providing the desired outcome, especially in the environment of reducing study years and increasing the number of working, even full time, students. Some of these points can be successfully addressed by using innovative teaching methods, including Problem Based Learning and Case Study. These methods have been implemented in teaching a variety of subjects, and their proponents have a strong base for advocating even wider use, but even those who are convinced of their advantages are reluctant to turn their lectures in to problem solving or case analysis. This is due to a number of reasons, including institutional and environmental ones, but at least some of it is the obstacle of needing to write a problem or a case. Readymade cases and problems are not in abundance and must be tailored to each class anyway. In order to achieve the desired outcome these must be, in simpler terms, good stories, and even the best engineering teachers cannot always be expected to write well, especially in such a challenging subject. This paper aims to describe the process of creating an interesting, useful and motivating problem or case for use in engineering classes and providing the tools for teachers to include more problem solving or case analysis in their teaching process. This process is based on the experience of using Problem Based Learning and Case Study with second year materials engineering students for teaching basic electronics. The use of these learning methods were met with interest and enthusiasm from students, and the outcomes strongly depended on the quality of problems and cases used.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133279706","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130338
Viktor Durcek, M. Kuba, M. Dado
Two algorithms for removal of short cycles in Tanner graphs of parity-check matrices of binary LDPC codes constructed by Progressive Edge-Growth algorithm are described. These loop-removing algorithms can be used to improve error-correcting performance of existing LDPC codes and achieved results are provided.
{"title":"Algorithm for Removal of Short Cycles in Tanner Graphs with Minimum-Hamming-Distance Check","authors":"Viktor Durcek, M. Kuba, M. Dado","doi":"10.1109/ELEKTRO49696.2020.9130338","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130338","url":null,"abstract":"Two algorithms for removal of short cycles in Tanner graphs of parity-check matrices of binary LDPC codes constructed by Progressive Edge-Growth algorithm are described. These loop-removing algorithms can be used to improve error-correcting performance of existing LDPC codes and achieved results are provided.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133608971","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130213
M. Dlouhý, V. Kotlan, I. Doležel
A model of indirect induction heating of very thin layers made of electrically non-conductive materials is presented. The model consists of two partial differential equations describing electromagnetic and temperature fields whose distributions are solved numerically. It is applicable for the design of devices intended for hardening of coatings (paints, lacquers or artificial resins) on metal surfaces, which is illustrated with an example, whose results are verified experimentally.
{"title":"Indirect induction hardening of thin electrically non-conductive layers","authors":"M. Dlouhý, V. Kotlan, I. Doležel","doi":"10.1109/ELEKTRO49696.2020.9130213","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130213","url":null,"abstract":"A model of indirect induction heating of very thin layers made of electrically non-conductive materials is presented. The model consists of two partial differential equations describing electromagnetic and temperature fields whose distributions are solved numerically. It is applicable for the design of devices intended for hardening of coatings (paints, lacquers or artificial resins) on metal surfaces, which is illustrated with an example, whose results are verified experimentally.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122286617","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 : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130339
A. I. Efimov, I. Kudinov, O. Melnik, M. Nikiforov, I. S. Kholopov
The article considers two approaches to solving the problem of multispectral images superimposition in vision systems: based on the search for key points correspondences and preliminary photogrammetric calibration using a universal test object. Shows two variants of the test object design. The advantages and disadvantages of superimposition of the visible and infrared images by two strategies are analyzed.
{"title":"Digital Multispectral Images Superimposition Based on Preliminary Calibration or Contour Analysis: Advantages and Disadvantages","authors":"A. I. Efimov, I. Kudinov, O. Melnik, M. Nikiforov, I. S. Kholopov","doi":"10.1109/ELEKTRO49696.2020.9130339","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130339","url":null,"abstract":"The article considers two approaches to solving the problem of multispectral images superimposition in vision systems: based on the search for key points correspondences and preliminary photogrammetric calibration using a universal test object. Shows two variants of the test object design. The advantages and disadvantages of superimposition of the visible and infrared images by two strategies are analyzed.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125230957","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 : 2020-05-01DOI: 10.1109/elektro49696.2020.9130295
{"title":"UPS as an Active Part of Smart Grid","authors":"","doi":"10.1109/elektro49696.2020.9130295","DOIUrl":"https://doi.org/10.1109/elektro49696.2020.9130295","url":null,"abstract":"","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127674028","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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