Pub Date : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046371
M. Hamouda, Fahad Al-Amyal, L. Számel
Switched reluctance motors (SRMs) are attaining increasing interest as they are powerful candidates for several industrial applications, especially electric vehicles (EVs). And since, SRMs cannot run directly from AC or DC supply. SRMs require a commutation process that includes a closed-loop current control accordingly to the rotor position. Internal faults in motor coils directly affect the control system and output power. This, in turn, causes overheating and lower efficiency. Besides, it causes fast degradation of motor life. Therefore, this paper presents a modeling and simulation for SRMs, including internal faults. The simulation of SRM is not a simple task to achieve. Hence, the involvement of internal faults increases the challenge. Besides, this paper gives a detailed analysis of machine performance with internal faults. The analysis gives a very good help in understanding the problem and seek for solutions.
{"title":"Modeling and Simulation of Switched Reluctance Motor with Internal Fault Capability","authors":"M. Hamouda, Fahad Al-Amyal, L. Számel","doi":"10.1109/CANDO-EPE57516.2022.10046371","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046371","url":null,"abstract":"Switched reluctance motors (SRMs) are attaining increasing interest as they are powerful candidates for several industrial applications, especially electric vehicles (EVs). And since, SRMs cannot run directly from AC or DC supply. SRMs require a commutation process that includes a closed-loop current control accordingly to the rotor position. Internal faults in motor coils directly affect the control system and output power. This, in turn, causes overheating and lower efficiency. Besides, it causes fast degradation of motor life. Therefore, this paper presents a modeling and simulation for SRMs, including internal faults. The simulation of SRM is not a simple task to achieve. Hence, the involvement of internal faults increases the challenge. Besides, this paper gives a detailed analysis of machine performance with internal faults. The analysis gives a very good help in understanding the problem and seek for solutions.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126136527","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046365
M. Pavlík, Samuel Bucko, J. Zbojovský, L. Beňa
This paper discusses changing the series resistor parameter. The article describes a replacement model of a photovoltaic cell, which also includes a series resistor. Its change affects the overall production of photovoltaic cells and subsequently panels. The paper also describes the effect of series resistance on the V-A characteristic of photovoltaic cells connected in series. The results show that increasing the value of the series resistance affects the shape of the V-A characteristic and the power characteristic.
{"title":"Monitoring of Photovoltaic Cell Parameters","authors":"M. Pavlík, Samuel Bucko, J. Zbojovský, L. Beňa","doi":"10.1109/CANDO-EPE57516.2022.10046365","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046365","url":null,"abstract":"This paper discusses changing the series resistor parameter. The article describes a replacement model of a photovoltaic cell, which also includes a series resistor. Its change affects the overall production of photovoltaic cells and subsequently panels. The paper also describes the effect of series resistance on the V-A characteristic of photovoltaic cells connected in series. The results show that increasing the value of the series resistance affects the shape of the V-A characteristic and the power characteristic.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114556009","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046369
Z. Varga, Ervin Rácz
Due to the EU’s energy strategy in order to improve the efficiency, researchers look for solutions to recover the waste heat. Heat can accumulate inside the system which might have a reduction effect on the electrical parameters. Consequently, transporting the accumulated heat can increase the overall efficiency of the system and can reduce the degradation effect of the accumulated heat. Thermoelectric generator directly converts the heat to electrical current via Seebeck effect. In order to directly convert the thermal energy that passes through the device into electricity, hight temperature difference has to occur. Consequently, the use of thermoelectric generator provides the opportunity to increase the overall efficiency of the system. Currently, Bismuth Telluride material is used for industrial thermoelectric modules. The simulation of the thermoelectric generator is a crucial part in the investigation of the performance. In the current article the optimization of waste heat recovery is studied using thermoelectric generator by modifying the leg geometries. During the comparison hexagon, trapeze, cube and cylinder geometries were taken into consideration. Based on the results, the hexagon geometry was the most optimal.
{"title":"COMSOL 3D Simulation of Optimization of Waste Heat Recovery Using Thermoelectric Generator by Modifying the Design","authors":"Z. Varga, Ervin Rácz","doi":"10.1109/CANDO-EPE57516.2022.10046369","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046369","url":null,"abstract":"Due to the EU’s energy strategy in order to improve the efficiency, researchers look for solutions to recover the waste heat. Heat can accumulate inside the system which might have a reduction effect on the electrical parameters. Consequently, transporting the accumulated heat can increase the overall efficiency of the system and can reduce the degradation effect of the accumulated heat. Thermoelectric generator directly converts the heat to electrical current via Seebeck effect. In order to directly convert the thermal energy that passes through the device into electricity, hight temperature difference has to occur. Consequently, the use of thermoelectric generator provides the opportunity to increase the overall efficiency of the system. Currently, Bismuth Telluride material is used for industrial thermoelectric modules. The simulation of the thermoelectric generator is a crucial part in the investigation of the performance. In the current article the optimization of waste heat recovery is studied using thermoelectric generator by modifying the leg geometries. During the comparison hexagon, trapeze, cube and cylinder geometries were taken into consideration. Based on the results, the hexagon geometry was the most optimal.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114761764","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046374
Z. Varga, Ervin Rácz
Sun simulator is widely used for solar cell testing after its manufacturing. This artificial light source offers intensity and spectrum close to the natural light. This study describes a development of a sun simulator which fits into a class C sun simulator according to American Society for Testing and Material (ASTM) E972 standard. The sun simulator was examined based on spectral match, a spectral conformity, uniformity of irradiance (unevenness of light intensity) and spectral difference for the given wavelength range. On the other hand, surface temperature of solar cell was also tested. The sun simulator is able to illuminate 10 cm × 10 cm solar cell in a laboratory environment. On the other hand, it consists of a Geweiss light emitting diode (LED) and four halogen lamps. The designed and built sun simulator is validated using the abovementioned standard which is described in the current paper as well. The research was supported by the Ministry for Innovation and Technology: National Research, Development and Innovation Office.
{"title":"Sun Simulator for Laboratory Testing","authors":"Z. Varga, Ervin Rácz","doi":"10.1109/CANDO-EPE57516.2022.10046374","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046374","url":null,"abstract":"Sun simulator is widely used for solar cell testing after its manufacturing. This artificial light source offers intensity and spectrum close to the natural light. This study describes a development of a sun simulator which fits into a class C sun simulator according to American Society for Testing and Material (ASTM) E972 standard. The sun simulator was examined based on spectral match, a spectral conformity, uniformity of irradiance (unevenness of light intensity) and spectral difference for the given wavelength range. On the other hand, surface temperature of solar cell was also tested. The sun simulator is able to illuminate 10 cm × 10 cm solar cell in a laboratory environment. On the other hand, it consists of a Geweiss light emitting diode (LED) and four halogen lamps. The designed and built sun simulator is validated using the abovementioned standard which is described in the current paper as well. The research was supported by the Ministry for Innovation and Technology: National Research, Development and Innovation Office.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132464451","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046364
Moath M. Bani Fayyad, Angel Asipuela González, T. Iváncsy
Because of their high collection efficiency, electrostatic precipitators (ESPs) have become one of the most effective tools for removing particulates from flue gases in a variety of industries. However, it is difficult to meet the desired collection efficiency in some industrial applications. In planning the ESP devices, numerical models greatly help predict the performance. Many investigation groups are conducting projects to enhance the existing models considerably. One improvement region is creating a model to calculate the electrode shape’s effect. This study explores the wavy arrangement of collecting plates in combination with three shapes of corona wires that impact the efficiency of a single-stage ESP. Three different discharge electrodes are used (circular wire (CW), square wire (SW), and 45° square wire (45° SW)) in wavy plates (WPs). The comparison is made to flat plates (FPs) as a reference. This study demonstrates how the geometry of corona electrodes by using (WPs) affects the distribution of electric field strength, electric potential, space charge density, current density, fluid flow velocity, and collection efficiency.
{"title":"Numerical study of wavy collecting electrodes with different shapes of corona electrodes","authors":"Moath M. Bani Fayyad, Angel Asipuela González, T. Iváncsy","doi":"10.1109/CANDO-EPE57516.2022.10046364","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046364","url":null,"abstract":"Because of their high collection efficiency, electrostatic precipitators (ESPs) have become one of the most effective tools for removing particulates from flue gases in a variety of industries. However, it is difficult to meet the desired collection efficiency in some industrial applications. In planning the ESP devices, numerical models greatly help predict the performance. Many investigation groups are conducting projects to enhance the existing models considerably. One improvement region is creating a model to calculate the electrode shape’s effect. This study explores the wavy arrangement of collecting plates in combination with three shapes of corona wires that impact the efficiency of a single-stage ESP. Three different discharge electrodes are used (circular wire (CW), square wire (SW), and 45° square wire (45° SW)) in wavy plates (WPs). The comparison is made to flat plates (FPs) as a reference. This study demonstrates how the geometry of corona electrodes by using (WPs) affects the distribution of electric field strength, electric potential, space charge density, current density, fluid flow velocity, and collection efficiency.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130382334","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046366
Noura Sleibi, Areej Aldaghamin, Carsten Wolff
Many small and medium enterprises in the embedded systems’ field cannot afford to carry out their production testing efforts, which is known to be costly and time-consuming. Hence, their tendency to commission third party service providers to perform these tasks. Therefore, testing can be distributed among many testing locations, where isolated and locally operated test benches perform the tests on the Devices under Test (DUTs). The first goal of this work is to connect the system on the cloud level for better collaboration and online management of functional tests on software-intensive embedded systems. The second goal is to enhance the testing process by closing the open gap between testing and feedback on two levels of operation: the local level between the test benches and the DUTs, and on a wider level with the cloud. This is achieved by connecting the system online via the cloud, and by adopting the DevOps approach, which aims at automating the different processes to achieve an automated workflow that can automatically adapt itself to change. In this paper, the system architecture and prototype are presented, based on which, an automated and continuous feedback-based testing cycles were implemented and tested on two levels of operation.
{"title":"Automating Distributed Production Testing","authors":"Noura Sleibi, Areej Aldaghamin, Carsten Wolff","doi":"10.1109/CANDO-EPE57516.2022.10046366","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046366","url":null,"abstract":"Many small and medium enterprises in the embedded systems’ field cannot afford to carry out their production testing efforts, which is known to be costly and time-consuming. Hence, their tendency to commission third party service providers to perform these tasks. Therefore, testing can be distributed among many testing locations, where isolated and locally operated test benches perform the tests on the Devices under Test (DUTs). The first goal of this work is to connect the system on the cloud level for better collaboration and online management of functional tests on software-intensive embedded systems. The second goal is to enhance the testing process by closing the open gap between testing and feedback on two levels of operation: the local level between the test benches and the DUTs, and on a wider level with the cloud. This is achieved by connecting the system online via the cloud, and by adopting the DevOps approach, which aims at automating the different processes to achieve an automated workflow that can automatically adapt itself to change. In this paper, the system architecture and prototype are presented, based on which, an automated and continuous feedback-based testing cycles were implemented and tested on two levels of operation.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126201191","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046362
Joseph Anand, Marcel Koch, Fabian Schlenke, Fabian Kohlmorgen, Hendrik Wöhrle
Many functions and processes in Smart Homes can be improved by incorporating knowledge about the activities of the inhabitants. The inhabitant activities can be recognized by classifying typical sounds related to the activities using audio classification methods. In this paper, we present and approach for the classification of activity-based audio data, taking into account that in many cases the data processing has to be deployed on a resource-constrained device. An indoor dataset is created by recording 11 distinct human actions that are typically perfomed in a living room and kitchen setup. A Convolutional Neural Network (CNN) is used for classification that achieves an accuracy of up to 98%. In addition, network optimization methods like depthwise separable convolutions, pruning, channel scaling and quantization is used to reduce the memory footprint and computational requirements to obtain an optimized network with 93% fewer Million Floating point Operations (MFLOPs) and less than 2% drop in accuracy is achieved for use in resourceconstrained devices.
{"title":"Classification of Human Indoor Activities with Resource Constrained Network Architectures on Audio Data","authors":"Joseph Anand, Marcel Koch, Fabian Schlenke, Fabian Kohlmorgen, Hendrik Wöhrle","doi":"10.1109/CANDO-EPE57516.2022.10046362","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046362","url":null,"abstract":"Many functions and processes in Smart Homes can be improved by incorporating knowledge about the activities of the inhabitants. The inhabitant activities can be recognized by classifying typical sounds related to the activities using audio classification methods. In this paper, we present and approach for the classification of activity-based audio data, taking into account that in many cases the data processing has to be deployed on a resource-constrained device. An indoor dataset is created by recording 11 distinct human actions that are typically perfomed in a living room and kitchen setup. A Convolutional Neural Network (CNN) is used for classification that achieves an accuracy of up to 98%. In addition, network optimization methods like depthwise separable convolutions, pruning, channel scaling and quantization is used to reduce the memory footprint and computational requirements to obtain an optimized network with 93% fewer Million Floating point Operations (MFLOPs) and less than 2% drop in accuracy is achieved for use in resourceconstrained devices.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131076999","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046375
Borbély József
In the Hungarian National Competition (OKTV) a mathematical problem concerning the number of distinct dot products determined by a general set of vectors was posed in the year 2019. A special result concerning the number of distint dot products had to be proved. The problem was probably the most difficult one in the problem list of this year. We will solve an extension of this problem and we will discuss some generalization possibilities of it. At the end of the paper we will discuss a conjecture concerning this problem.
{"title":"On The Number of Distinct Dot Products","authors":"Borbély József","doi":"10.1109/CANDO-EPE57516.2022.10046375","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046375","url":null,"abstract":"In the Hungarian National Competition (OKTV) a mathematical problem concerning the number of distinct dot products determined by a general set of vectors was posed in the year 2019. A special result concerning the number of distint dot products had to be proved. The problem was probably the most difficult one in the problem list of this year. We will solve an extension of this problem and we will discuss some generalization possibilities of it. At the end of the paper we will discuss a conjecture concerning this problem.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122623284","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 : 2022-11-21DOI: 10.1109/cando-epe57516.2022.10046361
{"title":"CANDO-EPE 2022 Cover Page","authors":"","doi":"10.1109/cando-epe57516.2022.10046361","DOIUrl":"https://doi.org/10.1109/cando-epe57516.2022.10046361","url":null,"abstract":"","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"35 17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116656204","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 : 2022-11-21DOI: 10.1109/CANDO-EPE57516.2022.10046383
Z. Farkas, A. Ürmös, Á. Nemcsics
A database of regular sampling of Google hit numbers is prepared. The figures concerning the market related Google hit counts begin on 25th January. Market related Google hit counts are higher when American stock exchange indices decline. Market related elevated hit counts tend to coincide with higher standard deviation / average ratio of market related hit numbers.
{"title":"Imprint of Current Economic Facts in the Time Series of Google Results","authors":"Z. Farkas, A. Ürmös, Á. Nemcsics","doi":"10.1109/CANDO-EPE57516.2022.10046383","DOIUrl":"https://doi.org/10.1109/CANDO-EPE57516.2022.10046383","url":null,"abstract":"A database of regular sampling of Google hit numbers is prepared. The figures concerning the market related Google hit counts begin on 25th January. Market related Google hit counts are higher when American stock exchange indices decline. Market related elevated hit counts tend to coincide with higher standard deviation / average ratio of market related hit numbers.","PeriodicalId":127258,"journal":{"name":"2022 IEEE 5th International Conference and Workshop Óbuda on Electrical and Power Engineering (CANDO-EPE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115244821","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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