Pub Date : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425182
Srđan Divac, Branko M. Koprivica
The aim of this paper is to present an approach to representation of instantaneous magnetising power using harmonic components of the corresponding magnetic field and flux density. Magnetising power for a toroidal sample made of grain-oriented electrical steel has been calculated using measured magnetic field and flux density of the sample. The shape of the magnetic flux density waveform has been maintained triangular or sinusoidal during the experiments performed. A description of the experimental setup, a detailed mathematical approach and experimental and calculation results obtained, as well as appropriate discussion are presented in the paper.
{"title":"Representation of Instantaneous Magnetising Power using Harmonic Components","authors":"Srđan Divac, Branko M. Koprivica","doi":"10.1109/ATEE52255.2021.9425182","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425182","url":null,"abstract":"The aim of this paper is to present an approach to representation of instantaneous magnetising power using harmonic components of the corresponding magnetic field and flux density. Magnetising power for a toroidal sample made of grain-oriented electrical steel has been calculated using measured magnetic field and flux density of the sample. The shape of the magnetic flux density waveform has been maintained triangular or sinusoidal during the experiments performed. A description of the experimental setup, a detailed mathematical approach and experimental and calculation results obtained, as well as appropriate discussion are presented in the paper.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134150938","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425216
D. Çeli̇k, M. E. Meral, M. Waseem
The adoption of green energy policies is paid regard to as a major driver for renewable energy production development (REPD) in terms of fossil fuel combustion and the reduction of gas emissions. However, besides several challenges including energy sustainability, global warming and environmental pollution, COVID-19 arose in 2019 has a considerable impact on the REPD, companies and supply chains and decelerated the transition to the sustainable energy world. The industrial and commercial electrical energy users are imposed to restrict their operation during the COVID-19 outbreak. In this regard, this paper examines and investigates the impacts of restrictions and driving forces for the REPD and electrical energy demand in general and during COVID-19. The most critical factors for barriers and driving forces for the REPD have been examined and discussed in detail. Some important statistical data for investments in the energy sector and energy demand before and during COVID-19 have been addressed in detail.
{"title":"Restrictions and Driving Forces for Renewable Energy Production Development and Electrical Energy Demand in General and During COVID-19","authors":"D. Çeli̇k, M. E. Meral, M. Waseem","doi":"10.1109/ATEE52255.2021.9425216","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425216","url":null,"abstract":"The adoption of green energy policies is paid regard to as a major driver for renewable energy production development (REPD) in terms of fossil fuel combustion and the reduction of gas emissions. However, besides several challenges including energy sustainability, global warming and environmental pollution, COVID-19 arose in 2019 has a considerable impact on the REPD, companies and supply chains and decelerated the transition to the sustainable energy world. The industrial and commercial electrical energy users are imposed to restrict their operation during the COVID-19 outbreak. In this regard, this paper examines and investigates the impacts of restrictions and driving forces for the REPD and electrical energy demand in general and during COVID-19. The most critical factors for barriers and driving forces for the REPD have been examined and discussed in detail. Some important statistical data for investments in the energy sector and energy demand before and during COVID-19 have been addressed in detail.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"122 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133779414","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425282
Florin Ciuprina, Laura Andrei
The temperature dependent dielectric response of the LDPE-TiO2 nanodielectric with 5wt% TiO2 nanoparticles is presented in this paper. The role played by the nanofiller-polymer interface on this dielectric response is discussed based on results obtained by dielectric spectroscopy measurements performed at temperatures between 300 and 350 K and in the frequency range $10^{-2}-10^{6}$ Hz, but also by numerical modeling and data analysis. The obtained results show that the dielectric response of the tested nanodielectric is by far more intense than the one of the unfilled LDPE. Three thermally activated relaxation processes were emphasized in nanodielectric with respect to the unfilled polymer. All these relaxations are mainly due to the dielectric response of the polymer-nanofiller interface region, which dominates the dielectric behavior of the nanodielectric.
{"title":"Interface Role on Temperature Dependent Dielectric Response of LDPE-TiO2 Nanocomposites","authors":"Florin Ciuprina, Laura Andrei","doi":"10.1109/ATEE52255.2021.9425282","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425282","url":null,"abstract":"The temperature dependent dielectric response of the LDPE-TiO2 nanodielectric with 5wt% TiO2 nanoparticles is presented in this paper. The role played by the nanofiller-polymer interface on this dielectric response is discussed based on results obtained by dielectric spectroscopy measurements performed at temperatures between 300 and 350 K and in the frequency range $10^{-2}-10^{6}$ Hz, but also by numerical modeling and data analysis. The obtained results show that the dielectric response of the tested nanodielectric is by far more intense than the one of the unfilled LDPE. Three thermally activated relaxation processes were emphasized in nanodielectric with respect to the unfilled polymer. All these relaxations are mainly due to the dielectric response of the polymer-nanofiller interface region, which dominates the dielectric behavior of the nanodielectric.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123256155","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425146
L. Dumitrescu, C. Safta, Ioan Bălan, R. Rădoi, C. Cristescu
The paper is focused on the experimental results regarding the operation of a new energy recovery system. The system is used to electrohydraulic driven a lifting system. The energy recovery method is based on the use of a hydraulic power multiplier cylinder and an accumulator. Three working scenarios are presented and the performance of the system for each operating situation is highlighted and discussed.
{"title":"Experimental Results on an Energy Saving Method Applied to a Hydraulic Driven Lifting System","authors":"L. Dumitrescu, C. Safta, Ioan Bălan, R. Rădoi, C. Cristescu","doi":"10.1109/ATEE52255.2021.9425146","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425146","url":null,"abstract":"The paper is focused on the experimental results regarding the operation of a new energy recovery system. The system is used to electrohydraulic driven a lifting system. The energy recovery method is based on the use of a hydraulic power multiplier cylinder and an accumulator. Three working scenarios are presented and the performance of the system for each operating situation is highlighted and discussed.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125546450","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425242
Gideon-Gwanzuwang Dankat, A. Dobre, L. Dumitran
Electrical contacts’ main function is to close an electrical circuit securely transporting current throughout the contact surface. Electrical contacts range from high, medium to low current depending on their usage. Power transmitting electrical contacts are expected to transmit a current of a significant intensity whereas the signal transmitting electrical contacts usually transmit low currents. However, electrical contacts undergo gradual change at the interface due to the action of temperature, corrosion, mechanical discontinuities induced by vibration etc. all these disturbing factors lead to the aging and degradation of the contact. In some cases where the contact resistance increases due to electrical loses, the local temperature may increase, thereby accelerating contact degradation. This paper presents a numerical analysis on the variation of temperature of a simple low current contact model having a thin oxide film layer at the interface which serves as the ageing factor using finite element method (FEM) in COMSOL Multiphysics.
{"title":"Influence of Ageing on Electrothermal Condition of Low Current Contact","authors":"Gideon-Gwanzuwang Dankat, A. Dobre, L. Dumitran","doi":"10.1109/ATEE52255.2021.9425242","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425242","url":null,"abstract":"Electrical contacts’ main function is to close an electrical circuit securely transporting current throughout the contact surface. Electrical contacts range from high, medium to low current depending on their usage. Power transmitting electrical contacts are expected to transmit a current of a significant intensity whereas the signal transmitting electrical contacts usually transmit low currents. However, electrical contacts undergo gradual change at the interface due to the action of temperature, corrosion, mechanical discontinuities induced by vibration etc. all these disturbing factors lead to the aging and degradation of the contact. In some cases where the contact resistance increases due to electrical loses, the local temperature may increase, thereby accelerating contact degradation. This paper presents a numerical analysis on the variation of temperature of a simple low current contact model having a thin oxide film layer at the interface which serves as the ageing factor using finite element method (FEM) in COMSOL Multiphysics.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131383857","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425168
M. Ziegler, F. Brandl, A. Kuehl, J. Franke
The soft magnetic core is a basic component in electric motors, along with the winding and insulation systems. Soft magnetic cores are continuously magnetized and demagnetized to guide and amplify the magnetic flux. To reduce iron losses during operation, stator and rotor cores are usually made of thin laminated iron-silicon sheets insulated electrically from each other. These materials are easy to process (cutting, joining etc.), the costs are low, and the magnetic as well as the mechanical properties are adjustable during production. Due to the increasing requirements for electric motors for automotive sector, the material grades and corresponding manufacturing processes have been even optimized. For the production of Fe-Si laminations, the single sheets are stacked and joined. For this purpose, laser beam welding is increasingly used, especially in the series production of larger stators. However, the welding process affects the microstructure in the heat-affected zone and creates an electrically conductive connection between the single sheets. This increases the production-related iron losses, which have to be considered already in the design of the electric machine. As part of this research paper, the impact of laser welding of Fe-Si electrical steel sheets on the electromagnetic properties is analyzed and relationships are derived. This makes it possible to consider the production-related impact factors at an early stage.
{"title":"Evaluation of Laser-welded Electrical Steel Laminations for Electric Motors","authors":"M. Ziegler, F. Brandl, A. Kuehl, J. Franke","doi":"10.1109/ATEE52255.2021.9425168","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425168","url":null,"abstract":"The soft magnetic core is a basic component in electric motors, along with the winding and insulation systems. Soft magnetic cores are continuously magnetized and demagnetized to guide and amplify the magnetic flux. To reduce iron losses during operation, stator and rotor cores are usually made of thin laminated iron-silicon sheets insulated electrically from each other. These materials are easy to process (cutting, joining etc.), the costs are low, and the magnetic as well as the mechanical properties are adjustable during production. Due to the increasing requirements for electric motors for automotive sector, the material grades and corresponding manufacturing processes have been even optimized. For the production of Fe-Si laminations, the single sheets are stacked and joined. For this purpose, laser beam welding is increasingly used, especially in the series production of larger stators. However, the welding process affects the microstructure in the heat-affected zone and creates an electrically conductive connection between the single sheets. This increases the production-related iron losses, which have to be considered already in the design of the electric machine. As part of this research paper, the impact of laser welding of Fe-Si electrical steel sheets on the electromagnetic properties is analyzed and relationships are derived. This makes it possible to consider the production-related impact factors at an early stage.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126966358","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425194
L. Milici, Mihaela Pavăl, M. Milici, Eusebiu Toader
The paper presents a new transdisciplinary educational concept based on creative thinking, recommended for teaching science, technology and engineering.
本文提出了一种基于创造性思维的跨学科教育新理念，推荐用于理工科教学。
{"title":"eSTEMIA – Education in Science, Technology, Engineering, Mathematics, Informatics and Arts","authors":"L. Milici, Mihaela Pavăl, M. Milici, Eusebiu Toader","doi":"10.1109/ATEE52255.2021.9425194","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425194","url":null,"abstract":"The paper presents a new transdisciplinary educational concept based on creative thinking, recommended for teaching science, technology and engineering.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126981733","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425193
A. Chirilă, I. Deaconu, Cătălin Buşe
The article presents the current state of the periodic technical inspection topic, both local (Romania) and European Union level. Then it is described a practical approach addressing the issues, namely a smart system for monitoring the plays that are present in the steering system and the axles of a vehicle. The main goal is to assist the inspection personnel to perform an enhanced and efficient periodic technical inspection procedure, knowing that the malfunction of the mechanical joints system of a vehicle leads to hazardous events involving human casualties.
{"title":"Smart System for Vehicle Periodic Roadworthiness Tests","authors":"A. Chirilă, I. Deaconu, Cătălin Buşe","doi":"10.1109/ATEE52255.2021.9425193","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425193","url":null,"abstract":"The article presents the current state of the periodic technical inspection topic, both local (Romania) and European Union level. Then it is described a practical approach addressing the issues, namely a smart system for monitoring the plays that are present in the steering system and the axles of a vehicle. The main goal is to assist the inspection personnel to perform an enhanced and efficient periodic technical inspection procedure, knowing that the malfunction of the mechanical joints system of a vehicle leads to hazardous events involving human casualties.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126595756","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}
There is an immense necessity of several kB of embedded memory for Biomedical systems which typically operate in the sub-threshold domain with perfect efficiency. SRAMs dominates the total power consumption and the overall silicon area, as 70% of the die has been occupied by them. This brief proposes the design of a Transmission gate based SRAM cell for Biomedical applications eliminating the use of peripheral circuitry during the read operation. This topology offers smaller area, reduced delay, low power consumption and improved data stability in the read operation. The cell is implemented in 45nm CMOS technology operated at 0.45 V.
{"title":"Transmission Gate-Based 8T SRAM Cell for Biomedical Applications","authors":"Valluri Aswini, Sarada Musala, Avireni Srinivasulu","doi":"10.1109/ATEE52255.2021.9425314","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425314","url":null,"abstract":"There is an immense necessity of several kB of embedded memory for Biomedical systems which typically operate in the sub-threshold domain with perfect efficiency. SRAMs dominates the total power consumption and the overall silicon area, as 70% of the die has been occupied by them. This brief proposes the design of a Transmission gate based SRAM cell for Biomedical applications eliminating the use of peripheral circuitry during the read operation. This topology offers smaller area, reduced delay, low power consumption and improved data stability in the read operation. The cell is implemented in 45nm CMOS technology operated at 0.45 V.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125977421","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 : 2021-03-25DOI: 10.1109/ATEE52255.2021.9425288
C. Suru, M. Popescu, M. Linca
The aim of this paper is the implementation of field oriented control specific regulating loops in the Matlab Simulink environment, for the control of an experimental model. The experimental drive system is controlled by means of a Simulink model by using a DSP control board, specially designed for this purpose. This way, after the virtual validation of the control algorithm on the complete Simulink model of the drive system, the virtual power section is replaced by the physical power section. The Simulink control model is compiled and thus transformed into an executable program for the DSP board processor. The interface between the control algorithm and the power section is done by the prototyping board analog to digital converters and digital communication channels. The real time control of the system is provided by specific software making the link between the model and the hardware on one hand and giving the control and measurement instruments on the other hand. The correct implementation of the control algorithm was validated using the data sampled by the prototyping board and confirmed by the laboratory measurement equipment. The validated model can be converted to production code to be integrated in the program of a DSP controlled industrial system.
{"title":"The Rotoric Field Orientation Control Implementation for Induction Traction Motor on dSPACE 1104 DSP Board","authors":"C. Suru, M. Popescu, M. Linca","doi":"10.1109/ATEE52255.2021.9425288","DOIUrl":"https://doi.org/10.1109/ATEE52255.2021.9425288","url":null,"abstract":"The aim of this paper is the implementation of field oriented control specific regulating loops in the Matlab Simulink environment, for the control of an experimental model. The experimental drive system is controlled by means of a Simulink model by using a DSP control board, specially designed for this purpose. This way, after the virtual validation of the control algorithm on the complete Simulink model of the drive system, the virtual power section is replaced by the physical power section. The Simulink control model is compiled and thus transformed into an executable program for the DSP board processor. The interface between the control algorithm and the power section is done by the prototyping board analog to digital converters and digital communication channels. The real time control of the system is provided by specific software making the link between the model and the hardware on one hand and giving the control and measurement instruments on the other hand. The correct implementation of the control algorithm was validated using the data sampled by the prototyping board and confirmed by the laboratory measurement equipment. The validated model can be converted to production code to be integrated in the program of a DSP controlled industrial system.","PeriodicalId":359645,"journal":{"name":"2021 12th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126251299","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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