Pub Date : 2020-09-23DOI: 10.1109/EMCEUROPE48519.2020.9245872
Taiki Nishimoto, Naoki Sawada, Noriaki Takeda, M. Yamaoka, Toru Yamada
This paper presents a novel methodology for estimating the common mode (CM) current in isolated converters. We applied mode conversion theory as related to imbalance factor mismatch in transmission lines to an LLC resonant converter, and derived a theoretical equation representing the CM current by examining four operation modes of the converter. The CM current described by our proposed equation agreed closely with the results of a circuit simulation, indicating that mode conversion theory specific to transmission lines is also effective for the CM current estimation in switching converter circuits.
{"title":"Analysis of Common Mode Current of Isolated Converters Caused by Imbalance Factor Mismatch","authors":"Taiki Nishimoto, Naoki Sawada, Noriaki Takeda, M. Yamaoka, Toru Yamada","doi":"10.1109/EMCEUROPE48519.2020.9245872","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245872","url":null,"abstract":"This paper presents a novel methodology for estimating the common mode (CM) current in isolated converters. We applied mode conversion theory as related to imbalance factor mismatch in transmission lines to an LLC resonant converter, and derived a theoretical equation representing the CM current by examining four operation modes of the converter. The CM current described by our proposed equation agreed closely with the results of a circuit simulation, indicating that mode conversion theory specific to transmission lines is also effective for the CM current estimation in switching converter circuits.","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":"129473969","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/EMCEUROPE48519.2020.9245630
Siriana Paonessa, Walter Picariello, L. Bocciolini, C. Zappacosta, S. Pascoli, B. Tellini, M. Macucci
We present a case study on the evaluation of the radiated emission from a railway vehicle according to the EN 50121 standard. Measurements were performed in an open-area test site in two conditions: stationary mode and slow-moving mode, according to the technical document EN 50121-3-1:2018. Magnetic and electric field strengths were measured and compared with limit curves. The considered frequency range is from 150 kHz to 1 GHz. We exploit a time-domain analysis implemented with an EMI receiver, instead of a conventional swept frequency analysis, in order to reduce ambient noise variation, according to CISPR 16-1-1. The usage of a hybrid antenna is proposed to reduce the time needed to cover the 30 MHz to 1 GHz frequency range. We discuss the difficulties resulting from the contribution of external sources, which could be suppressed by performing the measurements in a suitable semi-anechoic chamber, such as the one available at the Laboratories of the Italian Railway Infrastructure Manager (RFI) Osmannoro location. We provide evidence that emission measurements performed in such semi-anechoic chamber yield results in agreement with those obtained in an open-area site.
{"title":"Analysis of the electromagnetic emission of a railway vehicle according to the EN 50121-3-1 standard: a case study","authors":"Siriana Paonessa, Walter Picariello, L. Bocciolini, C. Zappacosta, S. Pascoli, B. Tellini, M. Macucci","doi":"10.1109/EMCEUROPE48519.2020.9245630","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245630","url":null,"abstract":"We present a case study on the evaluation of the radiated emission from a railway vehicle according to the EN 50121 standard. Measurements were performed in an open-area test site in two conditions: stationary mode and slow-moving mode, according to the technical document EN 50121-3-1:2018. Magnetic and electric field strengths were measured and compared with limit curves. The considered frequency range is from 150 kHz to 1 GHz. We exploit a time-domain analysis implemented with an EMI receiver, instead of a conventional swept frequency analysis, in order to reduce ambient noise variation, according to CISPR 16-1-1. The usage of a hybrid antenna is proposed to reduce the time needed to cover the 30 MHz to 1 GHz frequency range. We discuss the difficulties resulting from the contribution of external sources, which could be suppressed by performing the measurements in a suitable semi-anechoic chamber, such as the one available at the Laboratories of the Italian Railway Infrastructure Manager (RFI) Osmannoro location. We provide evidence that emission measurements performed in such semi-anechoic chamber yield results in agreement with those obtained in an open-area site.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"22 6S 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":"122815020","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/EMCEUROPE48519.2020.9245650
S. Jeschke, J. Loos, M. Kleinen, O. Kurt, J. Bärenfänger, C. Hangmann, I. Wüllner
With the electrification of the traction system in current vehicle architectures, operating voltages of up to 850 V are introduced. Alongside with these fast switched voltages comes an increase of electromagnetic interference (EMI) inside the vehicle which may affect other in-vehicle systems. Especially with regard to the immunity of the latest communication and sensor systems, the in-vehicle electromagnetic compatibility (EMC) becomes a challenging aspect. This work focuses on the coupling effects between the high-voltage (HV) system and a 100Base-T1 two-wire Ethernet communication and the impact of pulse disturbances on the communications performance. Therefore, a test setup is presented which approximates the in-vehicle situation. It primarily consists of an electric vehicle traction system, which can be driven in different operating modes. An unshielded twisted pair (UTP) cable, terminated with passive load networks routed in parallel, is used to measure and analyze the coupled disturbance signal at its termination networks. Subsequently, in a second setup, immunity tests on an active communication line are performed in order to determine the impact of the coupled pulse disturbance on the performance of the communication channel.
{"title":"Susceptibility of 100Base-T1 Communication Lines to Coupled Fast Switching High-Voltage Pulses","authors":"S. Jeschke, J. Loos, M. Kleinen, O. Kurt, J. Bärenfänger, C. Hangmann, I. Wüllner","doi":"10.1109/EMCEUROPE48519.2020.9245650","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245650","url":null,"abstract":"With the electrification of the traction system in current vehicle architectures, operating voltages of up to 850 V are introduced. Alongside with these fast switched voltages comes an increase of electromagnetic interference (EMI) inside the vehicle which may affect other in-vehicle systems. Especially with regard to the immunity of the latest communication and sensor systems, the in-vehicle electromagnetic compatibility (EMC) becomes a challenging aspect. This work focuses on the coupling effects between the high-voltage (HV) system and a 100Base-T1 two-wire Ethernet communication and the impact of pulse disturbances on the communications performance. Therefore, a test setup is presented which approximates the in-vehicle situation. It primarily consists of an electric vehicle traction system, which can be driven in different operating modes. An unshielded twisted pair (UTP) cable, terminated with passive load networks routed in parallel, is used to measure and analyze the coupled disturbance signal at its termination networks. Subsequently, in a second setup, immunity tests on an active communication line are performed in order to determine the impact of the coupled pulse disturbance on the performance of the communication channel.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"133 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":"121094725","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/EMCEUROPE48519.2020.9245728
O. Kerfin, M. Harm
In the field of EMC, RF properties of a system under test are usually analyzed in the frequency domain. When measuring RF impedances in common power electronic systems the result depends on the duty cycle of the device due to averaging effects as the sweep time exceeds the switching cycle duration by far. For this reason, this contribution introduces a switching cycle synchronized RF impedance analysis method. The method breaks down the slow measurement into several quick sub-measurements and allows for a characterization of RF impedances as a function of time as well as frequency. The analysis method is validated in an experimental setup on the basis of reference measurements and analytical calculations. Furthermore, first RF impedance measurement results of a simple buck converter obtained with the proposed method are discussed.
{"title":"Time Domain Analysis of RF Impedances in Fast Switching Power Electronic Systems","authors":"O. Kerfin, M. Harm","doi":"10.1109/EMCEUROPE48519.2020.9245728","DOIUrl":"https://doi.org/10.1109/EMCEUROPE48519.2020.9245728","url":null,"abstract":"In the field of EMC, RF properties of a system under test are usually analyzed in the frequency domain. When measuring RF impedances in common power electronic systems the result depends on the duty cycle of the device due to averaging effects as the sweep time exceeds the switching cycle duration by far. For this reason, this contribution introduces a switching cycle synchronized RF impedance analysis method. The method breaks down the slow measurement into several quick sub-measurements and allows for a characterization of RF impedances as a function of time as well as frequency. The analysis method is validated in an experimental setup on the basis of reference measurements and analytical calculations. Furthermore, first RF impedance measurement results of a simple buck converter obtained with the proposed method are discussed.","PeriodicalId":332251,"journal":{"name":"2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"155 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":"121086719","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/EMCEUROPE48519.2020.9245692
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/EMCEUROPE48519.2020.9245825
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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