Pub Date : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245692
L. Devaraj, A. Ruddle, A. Duffy
At present, automotive functional safety and EMC engineering are largely carried out independently. Current EMC regulations aim to avoid unwanted disturbances by setting appropriate immunity threat levels and emission limits. However, with the rapidly evolving technology and complexity of automotive systems, the limits identified in standards may no longer be appropriate. Hence the identification and assessment of EMC-related risks are becoming increasingly necessary. This paper outlines the tools used to support risk analysis for functional safety and presents initial proposals for a graphical method to better align the analysis of EMC risks and functional safety.
{"title":"System Level Risk Analysis for Immunity in Automotive Functional Safety Analyses","authors":"L. Devaraj, A. Ruddle, A. Duffy","doi":"10.1109/EMCEUROPE48519.2020.9245692","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245692","url":null,"abstract":"At present, automotive functional safety and EMC engineering are largely carried out independently. Current EMC regulations aim to avoid unwanted disturbances by setting appropriate immunity threat levels and emission limits. However, with the rapidly evolving technology and complexity of automotive systems, the limits identified in standards may no longer be appropriate. Hence the identification and assessment of EMC-related risks are becoming increasingly necessary. This paper outlines the tools used to support risk analysis for functional safety and presents initial proposals for a graphical method to better align the analysis of EMC risks and functional safety.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126587864","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245801
Tom Hartman, R. Grootjans, N. Moonen, F. Leferink
By analyzing electromagnetic interference (EMI) based on its spectral components important time-domain information is lost. Conventional super-heterodyne frequency band stepping EMI test receivers have to use long dwell times for every frequency which makes the total measurement time too long. Often dwell times are set too short, causing time-varying interference, or cyclo-stationary interference, to be detected improperly. The concept of time-varying EMI is also not incorporated in standards, which are only based on frequency domain limits. To catch these time-varying interferences the receiver has to measure for at least one repetition period. Measuring many spectral components for at least the repetition of a cyclo-stationary signal causes detrimental measurement times. Time-domain electromagnetic interference (EMI) analyzers have been proposed to reduce these long measurement times, but remain expensive. To reduce costs the utilization of time-domain EMI measurements using a low cost digitizer is examined. A PicosScope in conjunction with Digital Signal Processing (DSP) is used to create the possibility to estimate the total measurement time of a conventional EMI receiver based on the dwell times. This can be used to optimize the total measurement time needed for the test receiver, while still complying to standards, resulting in reduced measurement times otherwise needed in expensive test labs. A short-time Fast-Fourier transform (STFFT) is used to examine the interfering source in both frequency and time simultaneously. It was also shown that the conventional EMI receiver perceives certain time varying signals as continuous waves due to the spectral nature of this receiver.
{"title":"Time-Domain EMI Measurements using a Low Cost Digitizer to Optimize the Total Measurement Time for a Test Receiver","authors":"Tom Hartman, R. Grootjans, N. Moonen, F. Leferink","doi":"10.1109/EMCEUROPE48519.2020.9245801","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245801","url":null,"abstract":"By analyzing electromagnetic interference (EMI) based on its spectral components important time-domain information is lost. Conventional super-heterodyne frequency band stepping EMI test receivers have to use long dwell times for every frequency which makes the total measurement time too long. Often dwell times are set too short, causing time-varying interference, or cyclo-stationary interference, to be detected improperly. The concept of time-varying EMI is also not incorporated in standards, which are only based on frequency domain limits. To catch these time-varying interferences the receiver has to measure for at least one repetition period. Measuring many spectral components for at least the repetition of a cyclo-stationary signal causes detrimental measurement times. Time-domain electromagnetic interference (EMI) analyzers have been proposed to reduce these long measurement times, but remain expensive. To reduce costs the utilization of time-domain EMI measurements using a low cost digitizer is examined. A PicosScope in conjunction with Digital Signal Processing (DSP) is used to create the possibility to estimate the total measurement time of a conventional EMI receiver based on the dwell times. This can be used to optimize the total measurement time needed for the test receiver, while still complying to standards, resulting in reduced measurement times otherwise needed in expensive test labs. A short-time Fast-Fourier transform (STFFT) is used to examine the interfering source in both frequency and time simultaneously. It was also shown that the conventional EMI receiver perceives certain time varying signals as continuous waves due to the spectral nature of this receiver.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125997038","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245861
J. Victoria, P. A. Martinez, A. Suarez, A. Alcarria, Sebastian Mirasol, J. Torres
The performance of a Near Field Communication (NFC) antenna may be diminished when it is placed close to any conductive surface such as a metallic case or a battery. This degradation is caused due to the stray magnetic field created by the eddy currents induced on the surface, which is opposite to the intended field generated by the NFC antenna. One of the first solutions that come to mind to designers when facing this problem is the use of high permeability magnetic shielding based on sintered ferrite sheets. This is a good approach but something that is not generally taken into account is that these materials introduce an additional inductance to the NFC antenna. If the permeability of the material is too high (respecting the necessary value for solving the problem), this additional inductance results in shifting the resonance frequency to lower values than the desired (13.56 MHz). Thereby this contribution focuses on the analysis of a ferrite-polymer composite magnetic shielding that provides lower relative permeability (µr = 25) at the communication frequency. This approach is more effective against the presence of a metallic element when there is a gap of some millimeters between the conductive surface and the NFC antenna. Therefore, different thicknesses of the same ferrite-polymer material are evaluated and the effect of introducing this kind of shielding between the conductive surface and the NFC antenna is analyzed from the standpoint of the loop antenna equivalent circuit. The results presented are based on the Smith Chart measurement as well as a simulation model that corroborates the results obtained experimentally.
{"title":"Design approach for high efficiency NFC systems with magnetic shielding materials","authors":"J. Victoria, P. A. Martinez, A. Suarez, A. Alcarria, Sebastian Mirasol, J. Torres","doi":"10.1109/EMCEUROPE48519.2020.9245861","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245861","url":null,"abstract":"The performance of a Near Field Communication (NFC) antenna may be diminished when it is placed close to any conductive surface such as a metallic case or a battery. This degradation is caused due to the stray magnetic field created by the eddy currents induced on the surface, which is opposite to the intended field generated by the NFC antenna. One of the first solutions that come to mind to designers when facing this problem is the use of high permeability magnetic shielding based on sintered ferrite sheets. This is a good approach but something that is not generally taken into account is that these materials introduce an additional inductance to the NFC antenna. If the permeability of the material is too high (respecting the necessary value for solving the problem), this additional inductance results in shifting the resonance frequency to lower values than the desired (13.56 MHz). Thereby this contribution focuses on the analysis of a ferrite-polymer composite magnetic shielding that provides lower relative permeability (µr = 25) at the communication frequency. This approach is more effective against the presence of a metallic element when there is a gap of some millimeters between the conductive surface and the NFC antenna. Therefore, different thicknesses of the same ferrite-polymer material are evaluated and the effect of introducing this kind of shielding between the conductive surface and the NFC antenna is analyzed from the standpoint of the loop antenna equivalent circuit. The results presented are based on the Smith Chart measurement as well as a simulation model that corroborates the results obtained experimentally.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130987929","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245791
Y. Kamimura, Kenshu Daimon, Naoya Matsumoto, Shunai Kimura, Ken Sato
Although the reference level of the contact current is defined in the ICNIRP protection guidelines up to a frequency of 110 MHz, the experimental verifications of the current perception threshold had been performed only up to a frequency of 3 MHz. Therefore, we are currently planning the current perception experiments above 3 MHz. We first developed a current exposure device at frequencies from 1 MHz to 10 MHz. We then performed a preliminary experiment using human volunteers and confirmed that the current perception threshold was actually obtained.
{"title":"Development of an Experimental System for Current Perception from 1 to 10 MHz","authors":"Y. Kamimura, Kenshu Daimon, Naoya Matsumoto, Shunai Kimura, Ken Sato","doi":"10.1109/EMCEUROPE48519.2020.9245791","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245791","url":null,"abstract":"Although the reference level of the contact current is defined in the ICNIRP protection guidelines up to a frequency of 110 MHz, the experimental verifications of the current perception threshold had been performed only up to a frequency of 3 MHz. Therefore, we are currently planning the current perception experiments above 3 MHz. We first developed a current exposure device at frequencies from 1 MHz to 10 MHz. We then performed a preliminary experiment using human volunteers and confirmed that the current perception threshold was actually obtained.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128464507","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245876
S. Tsiapenko, H. Hirsch
Electrification of the drivetrain in modern vehicles brings new problems to the front line. High power electronics, high capacity high voltage batteries and electric machines with vast power density are now common attributes for vehicles. Existing low voltage (LV) on-board power network was extended with a high voltage (HV) drivetrain, which made a great impact on electromagnetic compatibility compliance testing. Low voltage supply conducted and radiated emission limits were adapted by to fit new emissions with their much higher amplitudes. In order to fulfill new limits for HV systems the drivetrain must be fully shielded. Due to construction restrains, an application of a shield around the electric shaft of the powertrain is not feasible. Existing magnetic field inside the stator and insulation breakdowns inside of the bearings make coupling to the shaft very effective, which is resulting in undesirable shaft currents. Hence the drivetrain must comply with defined limits for the electromagnetic compatibility of low voltage on-board power systems. In order to comply, the coupling path between HV side and the shaft of the machine should fulfill the limits for coupling attenuation defined in the international standard International Special Committee on Radio Interference 25 (CISPR 25) [1]. This publication describes a method to obtain coupling attenuation of the machine in the operating state and presents results compared with the corresponding limits described in CISPR 25.
{"title":"Investigation of a High Frequency Coupling Path Between HV and Shaft of an Electric Machine","authors":"S. Tsiapenko, H. Hirsch","doi":"10.1109/EMCEUROPE48519.2020.9245876","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245876","url":null,"abstract":"Electrification of the drivetrain in modern vehicles brings new problems to the front line. High power electronics, high capacity high voltage batteries and electric machines with vast power density are now common attributes for vehicles. Existing low voltage (LV) on-board power network was extended with a high voltage (HV) drivetrain, which made a great impact on electromagnetic compatibility compliance testing. Low voltage supply conducted and radiated emission limits were adapted by to fit new emissions with their much higher amplitudes. In order to fulfill new limits for HV systems the drivetrain must be fully shielded. Due to construction restrains, an application of a shield around the electric shaft of the powertrain is not feasible. Existing magnetic field inside the stator and insulation breakdowns inside of the bearings make coupling to the shaft very effective, which is resulting in undesirable shaft currents. Hence the drivetrain must comply with defined limits for the electromagnetic compatibility of low voltage on-board power systems. In order to comply, the coupling path between HV side and the shaft of the machine should fulfill the limits for coupling attenuation defined in the international standard International Special Committee on Radio Interference 25 (CISPR 25) [1]. This publication describes a method to obtain coupling attenuation of the machine in the operating state and presents results compared with the corresponding limits described in CISPR 25.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134203585","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245753
S. Šesnić, Ante Soldo, D. Poljak
This paper presents a novel approach for the calculation of the transient impedance of the horizontal electrode used as a synchronous generator grounding. When a short circuit occurs in the network, corresponding short-circuit current acts as an excitation source of the horizontal grounding electrode. Both short-circuit current and horizontal electrode impulse response, are defined in the time domain in a closed form representation. Transient impedance calculation is based on the novel derivation of the closed form time domain solution for short-current excitation. Some illustrative numerical results are provided, taking into account various parameters of the grounding system.
{"title":"Transient Impedance of the Synchronous Generator Grounding Electrode due to Short Circuit Current","authors":"S. Šesnić, Ante Soldo, D. Poljak","doi":"10.1109/EMCEUROPE48519.2020.9245753","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245753","url":null,"abstract":"This paper presents a novel approach for the calculation of the transient impedance of the horizontal electrode used as a synchronous generator grounding. When a short circuit occurs in the network, corresponding short-circuit current acts as an excitation source of the horizontal grounding electrode. Both short-circuit current and horizontal electrode impulse response, are defined in the time domain in a closed form representation. Transient impedance calculation is based on the novel derivation of the closed form time domain solution for short-current excitation. Some illustrative numerical results are provided, taking into account various parameters of the grounding system.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134241556","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245655
V. Mordachev
Results of experimental verification of the proposed analytical technique for calculation of the average electromagnetic background (EMB) intensity created by base stations of cellular communications, which is based on estimation of the average electromagnetic loading on area (EMLA) created by base stations, are presented. This verification is executed by comparison of the published results of measurements of levels of EMB generated by 2G/3G radio networks in more than 30 countries, with the results of corresponding analytical worst-case estimations of EMLA and average EMB intensity for the real and potential places of EMB measurements. Results of this comparison convincingly confirm the adequacy of the offered analytical technique for worst-case estimation of EMB created by mobile (cellular) communications, and also support its real practical importance for an assessment of electromagnetic ecology of various areas, electromagnetic safety of population and intersystem EMC in conditions of extremely fast development of radio networks and services of 4G/5G/6G.
{"title":"Verification of Worst-Case Analytical Model for Estimation of Electromagnetic Background Created by Mobile (Cellular) Communications","authors":"V. Mordachev","doi":"10.1109/EMCEUROPE48519.2020.9245655","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245655","url":null,"abstract":"Results of experimental verification of the proposed analytical technique for calculation of the average electromagnetic background (EMB) intensity created by base stations of cellular communications, which is based on estimation of the average electromagnetic loading on area (EMLA) created by base stations, are presented. This verification is executed by comparison of the published results of measurements of levels of EMB generated by 2G/3G radio networks in more than 30 countries, with the results of corresponding analytical worst-case estimations of EMLA and average EMB intensity for the real and potential places of EMB measurements. Results of this comparison convincingly confirm the adequacy of the offered analytical technique for worst-case estimation of EMB created by mobile (cellular) communications, and also support its real practical importance for an assessment of electromagnetic ecology of various areas, electromagnetic safety of population and intersystem EMC in conditions of extremely fast development of radio networks and services of 4G/5G/6G.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133243701","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245825
Pham Hoang Duc, Garbe Heyno
This paper deals with the propagation of electromagnetic waves in coaxial TEM-Cells. The general theory of electromagnetic wave propagation in TEM-Cells is of high interest because of its practical use as a measurement environment. A semi-analytical method is used for computing the electromagnetic fields within the TEM-Cell. The so-called Generalized Telegraphist’s Equations will be developed for the TEM-Cell. This approach is particularly suitable for analyzing the electromagnetic fields because it not only calculates the overall field inside the TEM-Cell, but it also shows the mode coupling due to the variation of the geometry. This method, also known as cross-section method or coupled-mode theory, is applied to reduce the Maxwell equations to an infinite set of ordinary differential equations for the basis amplitudes of the eigenvectors of the electric and magnetic fields of a TEM-waveguide. As a numerical example, a tapered concentric coaxial TEM-Cell will be considered.
{"title":"Mode Coupling in TEM-Cells due to Variations in the Geometry using Generalized Telegraphist’s Equations","authors":"Pham Hoang Duc, Garbe Heyno","doi":"10.1109/EMCEUROPE48519.2020.9245825","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245825","url":null,"abstract":"This paper deals with the propagation of electromagnetic waves in coaxial TEM-Cells. The general theory of electromagnetic wave propagation in TEM-Cells is of high interest because of its practical use as a measurement environment. A semi-analytical method is used for computing the electromagnetic fields within the TEM-Cell. The so-called Generalized Telegraphist’s Equations will be developed for the TEM-Cell. This approach is particularly suitable for analyzing the electromagnetic fields because it not only calculates the overall field inside the TEM-Cell, but it also shows the mode coupling due to the variation of the geometry. This method, also known as cross-section method or coupled-mode theory, is applied to reduce the Maxwell equations to an infinite set of ordinary differential equations for the basis amplitudes of the eigenvectors of the electric and magnetic fields of a TEM-waveguide. As a numerical example, a tapered concentric coaxial TEM-Cell will be considered.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124037342","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245830
Tuhan Sapumanage, N. Sapumanage, Chamika Bandara
Surge Protection Devices (SPDs) are being extensively used at present to safeguard electronic equipment from lightning generated transient over-voltages. Despite SPDs being employed to protect electronic equipment, every year millions worth damages are being reported. Hence, isolation from the power grid would be considered as the best solution to prevent the infiltration of harmful energy contained in the transient over-voltages. But isolation cannot be performed by humans as they are not sensitive to imminent lightning discharges nor fast enough to respond post lightning events. Thus, there should be an extra-fast mechanism to detect imminent lighting discharge and perform a change-over from the utility supply to a local power supply. This study aims to device a machine learning solution which could be used to overcome such limitations in traditional SPDs. For the convenience of analysis, reported impulses were categorized into three signature types. Namely, pulse-burst, unipolar and bipolar. A data sample was taken which represents all above said signature types, was processed and fed into the Azure Machine Learning Studio in order to train a linear regression model. Such model yielded an R2 value of 0.7547. The strong positive correlation between the strength of the electric field and the magnitude of the induced voltage was thereby confirmed. The deployed solution had a mean accuracy of 87.82% of its predictions, confirming its ability to accurately predict the magnitude of the induced voltages to take proactive action and thereby safeguard electrical and electronic equipment if an incoming induced voltage is beyond the threshold.
{"title":"Study and Analysis on Addressing Present Drawbacks of Traditional Surge Protection Devices (SPDs) using Machine Learning","authors":"Tuhan Sapumanage, N. Sapumanage, Chamika Bandara","doi":"10.1109/EMCEUROPE48519.2020.9245830","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245830","url":null,"abstract":"Surge Protection Devices (SPDs) are being extensively used at present to safeguard electronic equipment from lightning generated transient over-voltages. Despite SPDs being employed to protect electronic equipment, every year millions worth damages are being reported. Hence, isolation from the power grid would be considered as the best solution to prevent the infiltration of harmful energy contained in the transient over-voltages. But isolation cannot be performed by humans as they are not sensitive to imminent lightning discharges nor fast enough to respond post lightning events. Thus, there should be an extra-fast mechanism to detect imminent lighting discharge and perform a change-over from the utility supply to a local power supply. This study aims to device a machine learning solution which could be used to overcome such limitations in traditional SPDs. For the convenience of analysis, reported impulses were categorized into three signature types. Namely, pulse-burst, unipolar and bipolar. A data sample was taken which represents all above said signature types, was processed and fed into the Azure Machine Learning Studio in order to train a linear regression model. Such model yielded an R2 value of 0.7547. The strong positive correlation between the strength of the electric field and the magnitude of the induced voltage was thereby confirmed. The deployed solution had a mean accuracy of 87.82% of its predictions, confirming its ability to accurately predict the magnitude of the induced voltages to take proactive action and thereby safeguard electrical and electronic equipment if an incoming induced voltage is beyond the threshold.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128542555","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 : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245688
Sena Çınar, Gökçenur Gürbüz, Merve Deniz Kozan
By developing of technology, electronic systems which are used in military platforms increases from past to present. Every electronic equipment emits some electromagnetic energy which can cause many problems. Some of these equipments can generate high level electromagnetic field such as nearby radars or communication systems. In military platforms; personnel, ordnance or electrically initiated devices may be affected because of these high level electromagnetic fields. Ordnance should be compatible with electromagnetic radiation. By reason of this, compatibility of ordnance is investigated in a military standard that is known as Hazard of Electromagnetic Radiation to Ordnance (HERO) which is defined in MIL-STD464. In this paper, different test setups are applied to improve the alternative HERO testing method.
{"title":"Importance of Cables During HERO Tests","authors":"Sena Çınar, Gökçenur Gürbüz, Merve Deniz Kozan","doi":"10.1109/EMCEUROPE48519.2020.9245688","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245688","url":null,"abstract":"By developing of technology, electronic systems which are used in military platforms increases from past to present. Every electronic equipment emits some electromagnetic energy which can cause many problems. Some of these equipments can generate high level electromagnetic field such as nearby radars or communication systems. In military platforms; personnel, ordnance or electrically initiated devices may be affected because of these high level electromagnetic fields. Ordnance should be compatible with electromagnetic radiation. By reason of this, compatibility of ordnance is investigated in a military standard that is known as Hazard of Electromagnetic Radiation to Ordnance (HERO) which is defined in MIL-STD464. In this paper, different test setups are applied to improve the alternative HERO testing method.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"315 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116120050","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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