- 标题
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- 实验方案
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[IEEE 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE) - Amsterdam (2018.8.27-2018.8.30)] 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE) - Emission Measurement of a Solar Park in the Frequency Range of 2 to 150 kHz
摘要： Although a few years have passed since the first electromagnetic compatibility problems occurred in the frequency range of 2 to 150 kHz, but we still lack fundamental standards, especially related to emission, that would ensure electromagnetic compatibility. Our aim was to get a better picture about the emission of a solar inverter and also about how disturbances generated by more inverters spread and aggregate on the grid. Thus, based on on-site measurements, this paper investigates the non-intentional supraharmonic emission (both current and voltage) of a solar park that consists of a total of 50 individual PV (photovoltaic) modules and inverters. Supraharmonic voltages and currents were measured at three locations: at one individual PV unit, at a busbar collecting the production of ten PV units and at the transformer, which connects the park with the grid. It was shown that the aggregation of these disturbances is a very complex process, but supraharmonic currents are more likely to flow between the inverters than into the grid. Another important result is that an alteration in production does not significantly change emission levels.
关键词： 2 kHz – 150 kHz,electromagnetic compatibility,supraharmonic emission,inverter,solar park
更新于2025-09-23 15:23:52
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[IEEE 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE) - Amsterdam (2018.8.27-2018.8.30)] 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE) - High-Resolution Near-Field Imaging and Far-Field Antenna Measurements with Atomic Sensors
摘要： Measurements of radio-frequency (RF) electric fields using atomic sensors based on quantum-optical spectroscopy of Rydberg states in vapors has garnered significant interest in recent years for the establishment of atomic standards for RF electric fields and towards the development of novel RF sensing instrumentation. Here we describe recent work employing atomic sensors for sub-wavelength near-field imaging of a Ku-band horn antenna. We demonstrate near-field imaging capability at a spatial resolution of λ/10 and measurements over a 72 to 240 V/m field range using off-resonance AC-Stark shifts of a Rydberg-atom resonance. A fiber-coupled atomic-sensor probe is also employed in far-field measurements of a WR-90 standard gain horn.
关键词： electromagnetic compatibility,Rydberg,atom,quantum sensing,RF,metrology,antenna characterization,microwave,Atomic sensors,electric field,antenna,radio-frequency
更新于2025-09-23 15:23:52
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[IEEE 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - Odessa, Ukraine (2018.9.4-2018.9.7)] 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - The Wideband Pulsed Antenna and its Application
摘要： This paper presents a design of the antenna with an expandable slot for effective radiating and receiving the ultra-wideband (UWB), short-pulse (SP) signals. The offered design of the antenna allows creating an interferential electromagnetic field of a bipolar pulse in an equivalent general antenna aperture. A quantitative and quality is evaluation of efficiency of proposed antenna design performed. It is shown that an application of the given antenna allows increasing the damaging range from acting the pulsed UWB signals.
关键词： temporal position-pulse transmission,wireless system,electromagnetic compatibility,wideband pulsed antenna,ultrawideband signal,data modulation
更新于2025-09-23 15:21:21
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Evaluation of EMI Effects on Static Electricity Meters
摘要： Recent studies involving large errors in static electricity meters when exposed to step changes in the current waveform are reviewed. Triggered by these findings, a joint European research project has recently started to further evaluate these effects. A description is given of this pre-normative research programme which aims to provide evidence and techniques to resolve this unsatisfactory meter error situation. The need or otherwise for a regulatory and standardisation response to these large meter errors is discussed.
关键词： watthour meters,standards,energy measurement,EMC immunity testing,static meters,Electromagnetic Compatibility
更新于2025-09-23 15:21:01
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - New Phase Modulator with Large Stroke and High Bandwidth for Improved Coherent Coupling Schemes
摘要： High-frequency signals on interconnects can cause significant radiated electromagnetic emissions. An intermediate level modeling method aimed at providing a faster solution with less computing resources to allow designers to obtain rapid approximations is desirable. This paper presents a modeling technique to speed up the evaluation of radiated fields from interconnect cables. Based on the Hertzian dipole radiation theory and transmission-line frequency-dependant solutions, the radiating source is modeled by the sum of a large number of short dipoles. This model allows the contributions of line-end discontinuities to be included through a vector network analyzer measurement together with a monopole approximation. The proposed method is verified by open-line and RG 58 coaxial cable measurements.
关键词： radiated electromagnetic emissions,Dipole radiation,transmission-line (TL) modeling,electromagnetic compatibility
更新于2025-09-19 17:13:59
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[IEEE 2019 6th International Conference on Image and Signal Processing and their Applications (ISPA) - Mostaganem, Algeria (2019.11.24-2019.11.25)] 2019 6th International Conference on Image and Signal Processing and their Applications (ISPA) - Enhanced Performance of Substrate Integrated Waveguide Bandstop Filter Based on Metamaterials SCSRRs
摘要： High-frequency signals on interconnects can cause significant radiated electromagnetic emissions. An intermediate level modeling method aimed at providing a faster solution with less computing resources to allow designers to obtain rapid approximations is desirable. This paper presents a modeling technique to speed up the evaluation of radiated fields from interconnect cables. Based on the Hertzian dipole radiation theory and transmission-line frequency-dependant solutions, the radiating source is modeled by the sum of a large number of short dipoles. This model allows the contributions of line-end discontinuities to be included through a vector network analyzer measurement together with a monopole approximation. The proposed method is verified by open-line and RG 58 coaxial cable measurements.
关键词： radiated electromagnetic emissions,Dipole radiation,transmission-line (TL) modeling,electromagnetic compatibility
更新于2025-09-19 17:13:59
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Disturbances Generated by Lighting Systems with LED Lamps and the Reduction in Their Impacts
摘要： The paper deals with electromagnetic disturbances in the form of current higher harmonics, which are generated by LED lighting elements. It presents the problems related to the formation and impact of higher harmonics in the electrical systems of commercial facilities. The results of tests and analyses of current distortions for two di?erent LED lamps are included, and these are in reference to the parameters set out in the normal applicable standards. A system was then proposed to improve the quality of energy in the mains of commercial facilities in the form of a two-stage power supply. Tests of the systems with the aforementioned LED lamps were conducted and commented upon after introduction of the two-stage power supply. The ?nal part of the paper contains a summary of the obtained test results.
关键词： electromagnetic compatibility,total harmonic distortion (THD),LED lamp,two-stage power supply,current and voltage distortion,lighting system,power factor correction (PFC),higher harmonics
更新于2025-09-16 10:30:52
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[IEEE 2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE - Barcelona, Spain (2019.9.2-2019.9.6)] 2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE - Investigating Lightning Induced Currents in Photovoltaic Modules
摘要： Bypass diode failures have been observed within solar photovoltaic (PV) plants after thunderstorm activity, with no evidence of direct lightning strikes to the PV plant. This paper examines the mechanisms by which currents may be induced within PV installations. Firstly by means of computational electromagnetic simulations, and secondly by means of real-world testing in a high-voltage laboratory. These investigations were conducted with the objective of minimizing the magnitudes of induced currents within a PV installation. It was found that poor inter-module wiring in a PV installation, and not the internal layout of the PV modules themselves, resulted in the largest magnitudes of the induced currents, and that better wiring practice would signi?cantly reduce these magnitudes. The presence of the conductive frame of a PV module was shown to reduce the magnitudes of the currents induced within the installation.
关键词： photovoltaic,high-voltage,electromagnetic compatibility,lightning
更新于2025-09-12 10:27:22
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Design on Program-Controlled Initiation System of the SCB explosive devices Based on Optical Fiber Communication
摘要： A control system for Semiconductor Bridge explosive devices is designed based on optical fiber Communication, which can make the explosive devices perform better in the complex electromagnetic environment. By the combination of programmable bus controller, ignition unit and the optical fiber communication, the ignition of the explosive devices in chronological order could be realized. After the system design was completed, the major function and anti-electromagnetic interference capability were tested. The results indicated that the system had remote-control ability, high reliability, high security and good electromagnetic compatibility. The system can be used in more complicated electromagnetic environment than the conventional initiating explosive devices.
关键词： programmable bus controller,ignition unit,electromagnetic compatibility,Semiconductor Bridge explosive devices,optical fiber communication
更新于2025-09-12 10:27:22
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Differential Electro-Optical Equivalent Circuit Model of a Vertical-Cavity Surface-Emitting Laser for Common-Mode Rejection Ratio Estimation
摘要： Vertical-cavity surface-emitting lasers (VCSEL) can be used to achieve galvanic isolation of systems operating in environments with high levels of electromagnetic noise. A small-signal differential electro-optical equivalent circuit model of a VCSEL is presented, in contrast to the usual single-ended models. The electro-optical and opto-electrical conversion of the signal is modelled, as well as the electrical characteristics of the VCSEL chip. The circuit model is based on an approach combining Y-parameters and mixed-mode S-parameters. Compared to conventional models that are aimed at describing the internal laser dynamics, the presented model is primarily focused on modelling the asymmetric parasitics in a differential VCSEL configuration. The parasitics between the 5-lead VCSEL TOSA package and the test printed circuit board are modelled. The impact of the asymmetry of the parasitics from the laser anode and cathode towards the ground is examined. The differential VCSEL model is used to estimate the transfer coefficients for both differential-mode and common-mode input signals. The ratio between the wanted and unwanted signal is expressed as the common-mode rejection ratio (CMRR). The model covers the frequency bandwidth up to 4 GHz required for integrated circuit EMC and ESD measurements.
关键词： lumped element model,laser diode,Electromagnetic compatibility,frequency domain characterization
更新于2025-09-11 14:15:04