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Добірка наукової літератури з теми "Conducted and radiated EMI"

Автор: Grafiati
Опубліковано: 21 вересня 2024

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Статті в журналах з теми "Conducted and radiated EMI"

1

Dong, Ying Hua, Mei Yin Liu, and Lei Cao. "EMI Noise Testing and Diagnosis for PV Inverter." Advanced Materials Research 805-806 (September 2013): 31–35. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.31.

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In this paper, a new method is proposed to test the conducted and radiated electromagnetic interference (EMI) noise of photovoltaic invert based on analysis the internal structure and measuring principle of artificial mains network, meanwhile, the power line radiated EMI noise of photovoltaic can also be estimated by CM noise current using current probe and CM noise extraction network. The experiment result show that the conducted EMI noise and radiated EMI noise of photovoltaic inverter can be test more reasonable by this method.
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2

Youssef, Moez, Giulio Antonini, Edith Clavel, James Roudet, S. Cristina, and Antonio Orlandi. "Conducted and radiated EMI characterization of power electronics converter." Computer Standards & Interfaces 20, no. 6-7 (March 1999): 488. http://dx.doi.org/10.1016/s0920-5489(99)91112-1.

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3

Stepins, Deniss, Aleksandrs Sokolovs, Janis Zakis, and Ouseph Charles. "Wireless Battery Chargers Operating at Multiple Switching Frequencies with Improved Performance." Energies 16, no. 9 (April 27, 2023): 3734. http://dx.doi.org/10.3390/en16093734.

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The operation of wireless battery chargers at multiple switching frequencies may lead to a noticeable suppression of conducted and radiated electromagnetic interference (EMI) at the cost of decreased efficiency (mainly at lower load resistances) and increased peak and root mean square values of currents of power components of the wireless battery charger. Moreover, the reduction in conducted EMI is only moderate (<8.3 dB). Therefore, a novel approach based on modified resonant circuits and a modified control technique to obtain better reduction in the conducted and radiated EMI without significantly compromising other performance characteristics of the wireless battery charger is proposed and validated by using simulations and experiments. It is shown in this paper that the wireless charger operating at multiple switching frequencies with the proposed approach for the performance improvement has a more effective implementation of the four-switching frequency spread-spectrum technique with better conducted and radiated EMI reduction at all load resistances, lower values of peak and RMS currents at all load resistances, and higher efficiency in constant current mode and in the beginning of constant voltage mode (at lower values of the load resistances) than that of the conventional wireless charger operating at multiple switching frequencies.
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4

Wong, Hei, Yan Chan, and Sui Wah. "Electromagnetic interference of switching mode power regulator with chaotic frequency modulation." Facta universitatis - series: Electronics and Energetics 15, no. 1 (2002): 111–22. http://dx.doi.org/10.2298/fuee0201111w.

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In this work, we propose an improved switching scheme (called chaotic frequency modulation (CFM)) for switched-mode power supplies to suppress the electromagnetic interference (EMI) noise source. The basic principle of CFM is to use a chaotic signal to modulate the switching signal so that the harmonics of noise power is distributed evenly over the whole spectrum instead of concentrated at the switching frequency. When compared with the conventional pulse width modulation (PWM) scheme, significant improvements in both conducted and radiated EMI noise levels were found with the proposed CFM method. For conducted EMI, the peak noise level was reduced by 25 dB_V. For radiated EMI, we found that the noise was found mainly in the frequency range of 30 MHz to 230 MHz and the CFM scheme would help to reduce the peak noise level in this frequency range by 22 dB_V.
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5

Hariyawan, Mohammad Yanuar, and Noptin Harpawi Harpawi. "Modifikasi Frekuensi Switching pada LED Driver Menggunakan Oscillator Lorenz Analog untuk Mereduksi Conducted EMI." Jurnal Elektro dan Mesin Terapan 6, no. 2 (November 30, 2020): 53–61. http://dx.doi.org/10.35143/elementer.v6i2.3600.

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Lampu light emitting diode (LED) menjadi semakin populer digunakan dalam berbagai macam aplikasi, karena penggunaan daya yang rendah, efisiensi yang tinggi dan perawatan yang rendah. Untuk mencapai efisiensi yang tinggi dalam transfer energi pada catu daya LED, diterapkan switched mode power supply (SMPS). SMPS diimplementasikan dengan pulse width modulation (PWM) yang beroperasi pada frekuensi konstan. Frekuensi switching konstan menghasilkan emisi yang signifikan di sejumlah frekuensi, emisi ini dinamakan electromagnetic interference (EMI). EMI yang dihasilkan termasuk di dalamnya frekuensi operasi fundamental catu daya dan harmoniknya melalui mekanisme conducted dan radiated. Sebagai akibatnya, SMPS berpotensi tidak bisa memenuhi standar electromagnetic compatibility (EMC). Modifikasi switching pada SMPS menggunakan teknik spread spectrum merupakan solusi yang murah dan berdaya guna dalam mitigasi EMI. Pada penelitian ini dilakukan modifikasi switching pada LED driver dengan sinyal chaotic Lorenz. Sinyal chaotic Lorenz diterapkan pada LED evaluation board kemudian dilihat kinerja EMI-nya dibandingkan saat LED driver bekerja dengan frekuensi konstan. Ketika diterapkan sinyal chaotic Lorenz terjadi penurunan level emisi EMI terbesar sebesar 16,5 dBµV.
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6

Posma, Siska Novita, Mohammad Yanuar Hariyawan, and Oddy Rifandi. "Perancangan Filter EMI Pasif dalam Rangka Mitigasi Conducted emission pada Lampu LED." Jurnal Elektro dan Mesin Terapan 5, no. 2 (November 30, 2019): 71–81. http://dx.doi.org/10.35143/elementer.v5i2.3376.

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Анотація:
Lampu light emitting diode (LED) populer digunakan dalam berbagai macam aplikasi, karena penggunaan daya yang rendah, efisiensi yang tinggi dan perawatan yang rendah. Keuntungan LED lainnya adalah awet dan ramah lingkungan karena lebih sedikit mengandung komposisi zat beracun jika dibandingkan dengan jenis lampu lain. Untuk mencapai efisiensi yang tinggi dalam transfer energi pada catu daya LED, diterapkan topologi switched mode power supply (SMPS). SMPS diimplementasikan dengan pulse width modulation (PWM) yang beroperasi pada frekuensi konstan, menghasilkan emisi yang signifikan disejumlah frekuensi melalui mekanisme conducted dan radiated, emisi ini dinamakan electromagnetic interference (EMI). Sebagai akibatnya, banyak lampu LED berpotensi tidak bisa memenuhi standar electromagnetic compatibility (EMC). Pada penelitian ini dilakukan perancangan dan implementasi filter EMI pasif untuk meredam conducted emission pada lampu LED yang ada dipasaran. Filter EMI pasif berupa low pass filter (LPF). Sebelum lampu LED diterapkan filter pasif EMI, conducted emission yang terukur melebihi standar regulasi CISPR 22 class B, nilai emisi tertinggi mencapai 82,5 dBµV pada frekuensi 299,25 kHz atau melebihi standar CISPR sebesar 30,9 dBµV. Saat filter pasif EMI dipasang lampu LED terjadi reduksi conducted emission pada rentang frekuensi 150kHz – 1,65MHz dengan nilai rata–rata sebesar 23,3 dBµV dan nilai reduksi maksimal sebesar 34,7 dBµV.
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7

Hou, Qun, Ya Ping Jin, and Yi Fan Zhou. "Electromagnetic Interference Testing and Suppression Methods for Automotive Window Lifter Motor." Applied Mechanics and Materials 433-435 (October 2013): 940–44. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.940.

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Анотація:
Window lifter motor is one of the potential electromagnetic interference (EMI) sources in automobile. Based on the research on the principle of Window lifter motor and the generation mechanism of EMI, its EMI characteristics are tested and analyzed. The EMI suppression methods are proposed. By comparing two filters methods,it shows that the designed filter suppresses the electromagnetic interference more effectively. Its conducted emission and radiated emission are lower than the second lever limits of CISPR 25-2007+.
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8

Ahmad, Fally, Mohammad Yanuar Hariyawan, and Siska Novita Posma. "Perancangan Dan Implementasi Passive Emi Filter Pada Switching Mode Power Supply (SMPS)." Jurnal Elektro dan Mesin Terapan 5, no. 1 (2019): 29–37. http://dx.doi.org/10.35143/elementer.v5i1.2519.

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Анотація:
Kebutuhan akan perangkat elektronik dengan frekuensi yang tinggi menyebabkan meningkatnya jumlah Electromagnetic Interference (EMI) yang memiliki dua jenis yaitu Conducted Emission dan Radiated Emission. Solusi dari mitigasi EMI tersebut adalah dengan menggunakan filter EMI. Switching Mode Power Supply (SMPS) merupakan sumber daya bagi hampir seluruh perangkat elektronik, namun SMPS ini juga sumber EMI untuk perangkat lain atau bahkan perangkat itu sendiri. Banyak perangkat elektronik yang beredar dipasaran namun belum memenuhi standar EMC. Dalam hal ini mitigasi EMI yang dapat dilakukan adalah dengan menggunakan filter EMI eksternal pasif. Dengan filter pasif ini EMI dari SMPS dapat diredam tanpa memerlukan energi tambahan untuk filter itu sendiri. Penelitian ini akan melakukan perancangan filter EMI untuk meredam noise conducted emission menggunakan sebuah passive EMI filter (PEF) pada SMPS. Filter PEF yang telah dirancang dan diujikan dapat digunakan pada SMPS 1 dan SMPS 2 dengan noise conducted emission sebelum filter sebesar 97,86 dBµV yang diredam menjadi 33 dBµV dan menghasilkan redaman noise conducted emission yang sangat baik (hingga 64,86 dBµV) dan memenuhi standar yang ditetapkan (CISPR22 Class B).
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9

Huang, Long, Fang Ping Yu, Tai Long Liu, Peng Li, Qi Dou Wu, and Hua Biao Jin. "Study on EMI Reduction of DC-DC Buck Converter." Advanced Materials Research 893 (February 2014): 742–46. http://dx.doi.org/10.4028/www.scientific.net/amr.893.742.

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Анотація:
DC-DC buck converter has been more widely used in automotive electronics because of its advantage of high efficiency and small size. However, it is one of the main causes of the conducted emission and radiation noise. The working principle and the mechanism of DC-DC buck converter which generate conducted emission and radiation noise in different frequency were analyzed. Then, two methods were proposed to reduce the low frequency radiated emission. One is weakening the AC current value of the inductor current through increasing the value of the output inductor, the other is reducing the loop area by adding the output filter, and both of the methods were verified by comparative test. Finally, the two schemes were used in designing the On-board controller, and it passed the radiated emissions (ALSE method) according to the international standard CISPR 25-2008.
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10

Tlig, M., J. Ben Hadj Slama, and M. A. Belaid. "Conducted and radiated EMI evolution of power RF N-LDMOS after accelerated ageing tests." Microelectronics Reliability 53, no. 9-11 (September 2013): 1793–97. http://dx.doi.org/10.1016/j.microrel.2013.07.111.

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Більше джерел

Дисертації з теми "Conducted and radiated EMI"

1

Seddighi, Mohsen. "Study, measurement, and modeling of the propagation of conducted emissions due to on-board chargers in grids with various earthing systems." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST087.

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Анотація:
La transition vers le véhicule électrique (VE), motivée par les politiques de décarbonation des transports et les avancées technologiques significatives en matière de stockage et de conversion de l'énergie électrique va se poursuivre dans les décennies à venir. En outre, les futurs chargeurs embarqués (On Board Charger - OBC) bidirectionnels en puissance vont contribuer à une plus grande stabilité du réseau, à l'effacement des pointes, voire même à améliorer l'intégration des ressources énergétiques renouvelables : on parle du concept "véhicule-à-réseau" (V2G). Cela signifie que non seulement le nombre de VE augmentera, mais aussi leurs temps de charge et de décharge connectés au réseau.Les besoins de compacité des équipements, favorisés par la disponibilité de composants à grande vitesse de commutation (SiC GaN) ont incité les constructeurs à accroitre les fréquences de fonctionnement des chargeurs embarqués ( > 50-100 kHz) avec comme corolaire l'augmentation de leurs émissions électromagnétiques conduites et rayonnées. En conséquence, ces sources de bruit restent connectées au réseau et fonctionnent durant des périodes prolongées, ce qui rend nécessaire d'anticiper de potentiels problèmes de compatibilité électromagnétique (CEM) dans les réseaux d'énergie : c'est le propos général de ce travail.L'un des objets de cette thèse concerne la méthode normalisée de mesure des émissions conduites dans laquelle l'impédance de mesure du bruit via le réseau de stabilisation de l'impédance de ligne (RSIL) n'est pas toujours représentative de l'impédance du réseau BT, ni évidemment de ses possibles fluctuations. Ainsi, les différents systèmes de mise à la terre fournis-sent des chemins présentant des impédances HF différentes qui peuvent modifier le niveau des émissions. Par conséquent, l'écart entre la configuration normative avec RSIL et l'impédance réelle au point d'accès du réseau électrique peut impacter l'efficacité du filtrage CEM, entraînant de potentiels dysfonctionnements dans les systèmes voisins et/ou connectés sur le même réseau.Le besoin d'analyse des variations d'impédance et les conséquences sur les filtres CEM nous ont conduit à développer et mettre en œuvre une méthodologie pour mesurer l'impédance HF de la terminaison de bruit en fonctionnement sous tension réseau nominale et en l'absence du RSIL. Cette approche permet de mesurer l'impédance en ligne de divers équipements et alimentations, en particulier le réseau de distribution. Partant de ces observations, l'étude de l'impact de l'impédance réelle du réseau sur le volume optimisé d'un filtre CEM a été abordé au travers de scénarios où différents niveaux normatifs ont été considérés.Afin d'examiner les émissions conduites causées par notre prototype de chargeur embarqué bidirectionnel dans un environnement contrôlé sans RSIL, un micro-réseau relié au réseau réel via un transformateur d'isolation a été réalisé. Ceci nous a permis de contrôler ses paramètres : impédance de source, longueur des câbles, système de mise à la terre et de maîtriser les variations d'impédance dues aux charges localement connectées. Les émissions conduites ont été ensuite mesurées et analysées en différents points du micro-réseau selon différentes configurations (régime de terre et différentes charges sur le micro-réseau).Parallèlement, un modèle fréquentiel du micro-réseau a été établi avec une nouvelle approche basée sur l'utilisation d'un solveur de type SPICE et sur l'acquisition expérimentale d'impédances élémentaires, permettant une simulation plus rapide pour des grands systèmes. Ce travail a été suivi par des procédures de vérification rigoureuses pour assurer la précision et la fidélité du modèle. Un modèle comportemental de type « boîte noire » a été développé pour l'OBC, définissant la source de bruit et ses impédances. Il est ainsi possible de simuler les ni-veaux de courant parasites en tout point du micro-réseau, quelque soit les charges connectées
The transition to electric vehicles (EVs), driven by policies to decarbonize transport and significant technological advances in electrical energy storage and conversion, will continue over the coming decades. What's more, future on-board chargers (OBCs) with bidirectional power supply will contribute to greater grid stability, peak-shaving, and even improved integration of renewable energy resources: we're talking about the "vehicle-to-grid" (V2G) concept. This means that not only will the number of EVs increase, but also their charging and discharging times when connected to the grid.The need for compact equipment, favored by the availability of high-speed switching components (SiC GaN), has prompted manufacturers to increase the operating frequencies of OBCs (> 50-100 kHz), with the corollary of increasing their conducted and radiated electromagnetic emissions. As a result, these noise sources remain connected to the grid and operate for extended periods, making it necessary to anticipate potential Electromagnetic Compatibility (EMC) problems in energy networks: this is the general aim of this work.One of the subjects of this thesis concerns the standardized method of measuring conduct-ed emissions, in which the noise measurement impedance via the Line Impedance Stabilization Network (LISN) is not always representative of the impedance of the LV network, nor of course of its possible fluctuations. Thus, different grounding systems provide paths with different HF impedances, which can alter the level of emissions. Consequently, the discrepancy between the normative configuration with LISN and the actual impedance at the point of access to the power network can impact the effectiveness of EMC filtering, leading to potential malfunctions in neighboring systems and/or those connected to the same network.The need to analyze impedance variations and their consequences on EMC filters led us to develop and implement a methodology for measuring the RF impedance of the noise termination while operating at nominal mains voltage and in the absence of the LISN. This approach makes it possible to measure the line impedance of various equipment and power supplies, in particular, the distribution network. Based on these observations, the study of the impact of actual network impedance on the optimized volume of an EMC filter was approached through scenarios where different normative levels were considered.In order to examine the conducted emissions caused by our prototype bidirectional on-board charger in a controlled environment without LISN, a microgrid connected to the real net-work via an isolation transformer was built. This enabled us to control its parameters: source impedance, cable length, grounding system and to control impedance variations due to locally connected loads. Conducted emissions were then measured and analyzed at various points on the microgrid, according to different configurations (grounding regime and different loads on the microgrid).In parallel, a frequency model of the microgrid was established using a new approach based on the use of a SPICE-type solver and the experimental acquisition of elementary impedances, enabling faster simulation for large systems. This work was followed by rigorous verification procedures to ensure model accuracy and fidelity. A "black box" behavioral model has been developed for the OBC, defining the noise source and its impedances. This makes it possible to simulate parasitic current levels at any point in the microgrid, whatever the connected loads.As a result, the model of the entire system has enabled us to analyze impedance variations and conducted emissions in an extended version of the realized system. The thesis will present a synthesis of the results
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2

Wang, Zijian. "Conducted EMI Noise Prediction and Filter Design Optimization." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/73166.

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Анотація:
Power factor correction (PFC) converter is a species of switching mode power supply (SMPS) which is widely used in offline frond-end converter for the distributed power systems to reduce the grid harmonic distortion. With the fast development of information technology and multi-media systems, high frequency PFC power supplies for servers, desktops, laptops and flat-panel TVs, etc. are required for more efficient power delivery within limited spaces. Therefore the critical conduction mode (CRM) PFC converter has been becoming more and more popular for these information technology applications due to its advantages in inherent zero-voltage soft switching (ZVS) and negligible diode reverse recovery. With the emerging of the high voltage GaN devices, the goal of achieving soft switching for high frequency PFC converters is the top priority and the trend of adopting the CRM PFC converter is becoming clearer. However, there is the stringent electromagnetic interference (EMI) regulation worldwide. For the CRM PFC converter, there are several challenges on meeting the EMI standards. First, for the CRM PFC converter, the switching frequency is variable during the half line cycle and has very wide range dependent on the AC line RMS voltage and the load, which makes it unlike the traditional constant-frequency PFC converter and therefore the knowledge and experience of the EMI characteristics for the traditional constant-frequency PFC converter cannot be directly applied to the CRM PFC converter. Second, for the CRM PFC converter, the switching frequency is also dependent on the inductance of the boost inductor. It means the EMI spectrum of the CRM PFC converter is tightly related the boost inductor selection during the design of the PFC power stage. Therefore, unlike the traditional constant-frequency PFC converter, the selection of the boost inductor is also part of the EMI filter design process and EMI filter optimization should begin at the same time when the power stage design starts. Third, since the EMI filter optimization needs to begin before the proto-type of the CRM PFC converter is completed, the traditional EMI-measurement based EMI filter design will become much more complex and time-consuming if it is applied to the CRM PFC converter. Therefore, a new methodology must be developed to evaluate the EMI performance of the CRM PFC converter, help to simplify the process of the EMI filter design and achieve the EMI filter optimization. To overcome these challenges, a novel mathematical analysis method for variable frequency PFC converter is thus proposed in this dissertation. Based on the mathematical analysis, the quasi-peak EMI noise, which is specifically required in most EMI regulation standards, is investigated and accurately predicted for the first time. A complete approximate model is derived to predict the quasi-peak DM EMI noise for the CRM PFC converter. Experiments are carried out to verify the validity of the prediction. Based on the DM EMI noise prediction, worst case analysis is carried out and the worst DM EMI noise case for all the input line and load conditions can be found to avoid the overdesign of the EMI filter. Based on the discovered worst case, criteria to ease the DM EMI filter design procedure of the CRM boost PFC are given for different boost inductor selection. Optimized design procedure of the EMI filter for the front-end converter is then discussed. Experiments are carried out to verify the validity of the whole methodology.
Ph. D.
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3

Liu, Qian. "Modular Approach for Characterizing and Modeling Conducted EMI Emissions in Power Converters." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29633.

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Анотація:
With the development of power electronics, electromagnetic interference (EMI) and electromagnetic compatibility (EMC) issues have become more and more important for both power converter designers and customers. This dissertation studies EMI noise emission characterization and modeling in power converters. A modular-terminal-behavioral (MTB) equivalent EMI noise source modeling approach is proposed. This work is the first to systematically develop a 3-terminal EMI noise source model for a switching phase-leg device module. Each module is modeled as pairs of equivalent noise current sources and source impedances. Although the proposed MTB modeling approach applies the linear circuit theory to a semiconductor switching device, which exhibits nonlinear behavior during switching transients, the analysis and experiments show that the nonlinearity has negligible practical effect on the modeling methodology. The validation range of the modeling methodology has been analyzed. One of the differences between the proposed MTB model and the other state-of-the-art models is that the MTB model characterizes and predicts the CM and DM noise simultaneously. The inseparable high-frequency CM and DM noise characteristics contributed by the source impedance and propagation path are analyzed. A comprehensive evaluation of different EMI noise source modeling approaches according to the criteria of accuracy, feasibility and generality has been presented. Results show that the MTB modeling approach is more accurate, feasible and general than other approaches. The modular and terminal characteristics of the MTB noise source model are verified in two more complicated cases. One example is the application of the MTB equivalent source model in a half-bridge AC converter with variable switching conditions. Although the MTB model is derived under a certain operating condition, the models under different conditions can be combined together to predict the EMI noise for the converter with variable switching conditions. Another example is the application of the MTB equivalent source model in multi-phase-leg converters. The EMI noise of a full-bridge converter is predicted based on the MTB equivalent source model of one phase-leg module. The implementation procedures and results for both applications are verified by the experiment. The applicability of the MTB model in different type of converters is discussed. Based on the MTB model, EMI noise management is explored. The parametric study based on the MTB model is demonstrated by selecting DC-link decoupling capacitors for voltage source converter (VSC). The EMI effect of a decoupling capacitor for a device s safe operation is analyzed, and this analysis shows the terminal characteristics of the MTB model. Both the EMI and voltage overshoot are predicted by the MTB model. A completed converter-level EMI model can be derived based on the noise source model and propagation path model. This model makes it possible to optimize the EMI filter design and study the EMI noise interactions between converters in a power conversion system.
Ph. D.
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4

Avola, Alessia. "Analysis and Reduction of Conducted EMI in Power Electronic Modules." Doctoral thesis, Università di Catania, 2015. http://hdl.handle.net/10761/3748.

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Анотація:
The phenomena causing the production and spreading of unwanted electromagnetic emissions arising from electrical or electronic devices, apparatuses and systems have been widely investigated over the last decades and reported in the relevant scientific literature. As a consequence of this, nowadays, the electromagnetic compatibility techniques, which limit the undesirable effects of these emissions, are very popular and of ever-increasing importance both in environmental and industrial contexts. The present thesis focuses on conducted electromagnetic emissions generated by power electronic modules making use of active devices operating with high switching frequency, which today are commonly utilized in a lot of sectors: aerospace, commercial, industrial, residential, telecommunication, transportation, utility systems. The onerous operating conditions of such modules, caused by high values of voltages and electric currents and very short switching times of active devices, make essential, in order to reach an efficient and economic use of materials and components, as well as a reliable and durable use of devices themselves, to carry out an accurate preliminary analysis of the mechanisms resulting in unwanted electromagnetic couplings between the various module components. Indeed, due to the unavoidable presence of parasitic inductances and capacitances and of extremely steep waveforms, electrical signals frequently originate inside the modules with high peak values and exasperated temporal dynamics, which strongly restrict the field of application of the modules themselves. For the sake of concreteness, the analysis of above described phenomena has been worked out on a power electronic module prototype made kindly available by STMicroelectronics, one of the world-leading companies in such field. After a first phase during of which have been individuated and computed the values of the most critical parasitic elements, by means of a theoretical investigation supported by suitable software tools, attention has been paid to how to reduce such values and improve the overall performance of the module. In this connection, some useful techniques to reduce significantly the undesirable emissions have been individuate and successfully applied to the prototype, so obtaining an optimized module from the electromagnetic emission point of view.
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5

Murase, John Takeshi. "Investigation of Buck Converter Radiated Emissions (150 kHz - 30 MHz) Measured according to CISPR 25." Thesis, KTH, Elektroteknisk teori och konstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-140954.

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Electromagnetic compatibility and compliance with relevant standards is imperative for commercial success for any type of electronic equipment. Since more and more electronics are constantly added into today’s vehicles, this is a highly significant matter in the automotive business. The primary source of electric energy in an on-road vehicle is typically a 12 or 24 volt battery; this makes voltage step down converters ubiquitous in virtually any automotive electronic system. In strive for ever more environmental friendly and energy efficient solutions a switch mode power supply is most often the given choice when it comes to the task of voltage conversion. However, the use of switch mode power supplies presents a new set of challenges when it comes to successfully comply with the electromagnetic emission standards. Knowledge and understanding about how different design parameters impact on EMC performance is key when few prototype runs and short time to market lies in focus. This text will investigate just how different layout design parameters affect the radiated emissions from a buck converter. Emphasis lies on radiated emissions in the lower frequency range up to a few MHz. Both computer simulations and practical measurements indicate the same thing; in the lower part of the frequency spectrum, when measured according to CISPR 25, radiated emissions from buck converters are dominated by voltage driven mechanisms. Along the way we will see how PCB layout alone can be responsible for differences in measured radiated emission levels of well over 20 dB.
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6

Freeman, Larry. "PREDICTION AND MEASUREMENT OF RADIATED EMISSIONS BASED ON EMPIRICAL TIME DOMAIN CONDUCTED MEASUREMENTS." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4232.

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This thesis develops a novel method to predict radiated emissions measurements. The techniques used are based on standard Electromagnetic Compatibility (EMC) qualification test methods. The empirical data used to formulate the final results was restricted to pertinent data protocol waveforms however the entire method may be applied to any waveforms for which empirical radiated emissions have been measured. The method provides a concise means for predicting worst case radiated emissions profiles based on empirical measured data.
M.S.E.E.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering
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7

Bishnoi, Hemant. "Behavioral EMI-Models of Switched Power Converters." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23936.

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Measurement-based behavioral electromagnetic interference (EMI) models have been shown earlier to accurately capture the EMI behavior of switched power converters. These models are compact, linear, and run in frequency domain, enabling faster and more stable simulations compared to the detailed lumped circuit models. So far, the behavioral EMI modeling techniques are developed and applied to the converter's input side only. The resulting models are therefore referred to as "terminated EMI models". Under the condition that the output side of the converter remains fixed, these models can predict the input side EMI for any change in the impedance of the input side network. However, any change at the output side would require re-extraction of the behavioral model. Thus the terminated EMI models are incapable of predicting the change in the input side EMI due to changes at the output side of the converter or vice versa. The above mentioned limitation has been overcome by an "un-terminated EMI model" proposed in this dissertation. Un-terminated EMI models are developed here to predict both the common-mode (CM) and the differential (DM) noise currents at the input and the output sides of a motor-drive system. The modeling procedure itself has been simplified and now requires fewer measurements and results in less noise in the identified model parameters. Both CM and DM models are then combined to predict the total noise in the motor drive system. All models are validated by experiments and their limitations identified. A significant portion of this dissertation is then devoted to the application of behavioral EMI models in the design of EMI filters. Comprehensive design procedures are developed for both DM and CM filters in a motor-drive system. The filters designed using the proposed methods are experimentally shown to satisfy the DO-160 conducted emissions standards. The dissertation ends with a summary of contributions, limitations, and some future research directions.
Ph. D.
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8

Midya, Surajit. "Conducted and Radiated Electromagnetic Interference in Modern Electrified Railways with Emphasis on Pantograph Arcing." Doctoral thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10574.

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9

Dolente, Andrea <1976&gt. "Analysis of the heatsink influence on conducted and radiated electromagnetic interference in power electronic converters." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/410/1/TesiDott.AndreaDolente.pdf.

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Dolente, Andrea <1976&gt. "Analysis of the heatsink influence on conducted and radiated electromagnetic interference in power electronic converters." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/410/.

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Книги з теми "Conducted and radiated EMI"

1

Smolenski, Robert. Conducted Electromagnetic Interference (EMI) in Smart Grids. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2960-8.

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Smolenski, Robert. Conducted Electromagnetic Interference (EMI) in Smart Grids. London: Springer London, 2012.

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3

Accredited Standards Committee on Electromagnetic Compatibility, C63. American national standard for electromagnetic compatibility: Radiated emission measurements in electromagnetic interference (EMI) control : calibration of antennas (9 kHz to 40 GHz). New York, N.Y: Institute of Electrical and Electronics Engineers, 2006.

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4

Rowe, Martin, and Kenneth Wyatt. Workbench Troubleshooting EMC Emissions: Simple Techniques for Radiated and Conducted Emissions Troubleshooting and Pre-Compliance Testing. Independently Published, 2021.

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5

Musznicki, Piotr. Conducted EMI in DC-DC Converters. de Gruyter GmbH, Walter, 2018.

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6

Musznicki, Piotr. Conducted EMI in DC-DC Converters. De Gruyter, Inc., 2018.

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7

Conducted Electromagnetic Interference Emi In Smart Grids. Springer, 2012.

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8

Lee, Jade. Conducted and Radiated Emissions on 8-Bit Mid-Range Microcontrollers. Microchip Technology Incorporated, 2015.

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9

Takenaka, Norio. TB3121 - Conducted and Radiated Emissions on 8-Bit Mid-Range MCUs. Microchip Technology Incorporated, 2015.

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10

Yang, Yvonne. TB3121 - Conducted and Radiated Emissions on 8-Bit Enhanced Mid-Range Microcontroller. Microchip Technology Incorporated, 2015.

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Частини книг з теми "Conducted and radiated EMI"

1

Mardiguian, Michel. "Troubleshooting Radiated EMI Problems." In Controlling Radiated Emissions by Design, 327–39. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04771-3_13.

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2

Mardiguian, Michel. "Troubleshooting Radiated EMI Problems." In Controlling Radiated Emissions by Design, 305–17. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-4357-2_13.

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3

Mardiguian, Michel. "Troubleshooting Radiated EMI Problems." In Controlling Radiated Emissions by Design, 267–78. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3102-9_13.

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4

Fluke, John C. "EMI Spectrum." In Controlling Conducted Emissions by Design, 23–47. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-7024-6_2.

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5

Fluke, John C. "EMI Analysis." In Controlling Conducted Emissions by Design, 163–78. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-7024-6_8.

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6

Mardiguian, Michel. "Reducing Radiated EMI Via Internal Cabling and Packaging." In Controlling Radiated Emissions by Design, 197–211. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04771-3_9.

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7

Mardiguian, Michel. "Reducing Radiated EMI via Internal Cabling and Packaging." In Controlling Radiated Emissions by Design, 187–215. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-4357-2_9.

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8

Mardiguian, Michel. "Reducing Radiated EMI via Internal Cabling and Packaging." In Controlling Radiated Emissions by Design, 152–79. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3102-9_9.

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9

Zhao, Yang, Wei Yan, Jun Sun, Mengxia Zhou, and Zhaojuan Meng. "Radiated EMI Noise Suppression Methods and Cases Study." In Electromagnetic Compatibility, 111–51. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-6452-6_5.

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10

Zhao, Yang, Wei Yan, Jun Sun, Mengxia Zhou, and Zhaojuan Meng. "Radiated EMI Noise Generation Mechanism, Measurement, and Diagnosis." In Electromagnetic Compatibility, 81–110. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-6452-6_4.

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Тези доповідей конференцій з теми "Conducted and radiated EMI"

1

Xing, Jiayue, Peng Huang, and Bing Li. "Susceptibility of Relay Module to Conducted EMI." In 2024 Photonics & Electromagnetics Research Symposium (PIERS), 1–5. IEEE, 2024. http://dx.doi.org/10.1109/piers62282.2024.10617944.

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2

Evangelista, Jamilson, Hermes Loschi, Eduardo Tavares Costa, Robert Smolenski, Niek Moonen, and Robert Vogt-Ardatjew. "Radiated and Conducted EMI by RF Fields at Hospital Environment." In 2021 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC). IEEE, 2021. http://dx.doi.org/10.1109/apemc49932.2021.9597035.

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3

Rostamzadeh, Cyrous. "Synchronous rectified step-down converter susceptibility to conducted and radiated EMI." In 2008 IEEE International Symposium on Electromagnetic Compatibility - EMC 2008. IEEE, 2008. http://dx.doi.org/10.1109/isemc.2008.4652080.

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4

Yao, Juntao, Yiming Li, Zhedong Ma, and Shuo Wang. "Advances of Modeling and Reduction of Conducted and Radiated EMI in Flyback Converters." In 2020 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2020. http://dx.doi.org/10.1109/ecce44975.2020.9236153.

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5

Yang Zhao, Yinghua Dong, Xiaoquan Lu, and Ningqiu Jiang. "Radiated EMI estimation for power line communication based on conducted noise separation network." In 2010 Asia-Pacific International Symposium on Electromagnetic Compatibility. IEEE, 2010. http://dx.doi.org/10.1109/apemc.2010.5475873.

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6

van Doom, M. "EMC demo box: conducted & radiated emission." In 2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03. IEEE, 2003. http://dx.doi.org/10.1109/icsmc2.2003.1428307.

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7

Wu, Wei. "Electromagnetic Interference (EMI) as Spark-Ignited Combustion Engines Diagnostic Parameter and Its Wireless Measurement and Wavelet Analysis." In ASME 2002 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/icef2002-500.

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This paper reveals that the ignition and combustion process of Spark-ignited Engine (SIE) inspires electromagnetic interference (EMI) that bears some inner information from SIE. The EMI conducted measurement and radiated measurement methods are experimented upon and both obtain correct signals while conducted measurement gets higher signal/noise ratio than radiated measurement. Because most signals are found in irregular structures and transient forms, the traditional frequency analysis tool Fourier Transform fails to deal with; and because during the combustion process the signals are mixed with environment noise; we use wavelet decomposition and Lipschitz signal singularity identification algorithm to confirm that among EMI signals, there are significant signals generated by SIE, thus offering an effective approach to further unveil the relationship between combustion process and EMI. Considering that the measurement is wireless completely, it is possible to develop a potable instrument for SIE diagnostic and research purpose.
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8

Rafiq, M. Ahsan, Muhammad Amin, and Jawad Yousaf. "Effect of shielding, grounding, EMI filters & ferrite beads on radiated & conducted emissions." In 2013 6th International Conference on Recent Advances in Space Technologies (RAST). IEEE, 2013. http://dx.doi.org/10.1109/rast.2013.6581278.

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9

Jingyang, Cao, Su Donglin, and Xie Shuguo. "Estimating Radiated Emission via Conducted Analysis." In 2007 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications. IEEE, 2007. http://dx.doi.org/10.1109/mape.2007.4393508.

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10

Yao, Juntao, Yanwen Lai, Zhedong Ma, and Shuo Wang. "Advances in Modeling and Reduction of Conducted and Radiated EMI in Non-isolated Power Converters." In 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. http://dx.doi.org/10.1109/apec42165.2021.9487164.

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Звіти організацій з теми "Conducted and radiated EMI"

1

Gawel, Ann. Pre- and post-storm inventory of endangered Partula radiolata snails at Asan Ridge, Guam. National Park Service, 2024. http://dx.doi.org/10.36967/2303261.

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The Partulidae are a Pacific-wide family of tree snails with high levels of endemism and with a majority of their extant species having special conservation concern. Having radiated across Pacific Islands, this family has evolved with some frequency of tropical storms. However, little is known about their response or recovery rates from severe storms. The island of Guam has its own unique species of Partulidae, Partula radiolata. One of the largest and most accessible occurrences of P. radiolata in the island is located at the Asan Beach Unit of the War in the Pacific National Historical Park. A population assessment of the area?s partulids was conducted approximately one month before a major typhoon ? Typhoon Mawar ? hit the island. The same series of transects used before the typhoon was repeated approximately three weeks after the typhoon. Two hundred twenty-five P. radiolata were counted in the Asan Beach Unit before the typhoon, and 177 after the typhoon. The biggest decline in numbers occurred amongst juvenile partulids ? from 53 counted before the typhoon, to just 11 after the typhoon. The vegetation was severely impacted by the storm, opening up much of the canopy and downing many trees and branches. Despite suffering some obvious mortality, P. radiolata were still persisting within the area. Because this is one of the most accessible populations of P. radiolata, we have an opportunity to monitor post-storm recovery on a regular basis that would be unfeasible at more remote population locations.
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