A5082786450- Electromagnetic Compatibility and Measurements
- Electromagnetic Compatibility and Noise Suppression
- Electromagnetic Fields and Biological Effects
- Transportation Systems and Safety
- Electromagnetic wave absorption materials
- Noise Effects and Management
- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Aerosol Filtration and Electrostatic Precipitation
- Magnetic Properties and Applications
- Power Line Communications and Noise
- Antenna Design and Optimization
- Electrical Contact Performance and Analysis
- Microwave and Dielectric Measurement Techniques
- Non-Destructive Testing Techniques
- Electric Motor Design and Analysis
- Mechanical and Thermal Properties Analysis
- Wireless Body Area Networks
- Sensor Technology and Measurement Systems
- Induction Heating and Inverter Technology
- Wireless Sensor Networks for Data Analysis
- Microwave Imaging and Scattering Analysis
- RFID technology advancements
- Engineering Diagnostics and Reliability
- Energy Harvesting in Wireless Networks
Academy of Romanian Scientists
2024-2025
University of Craiova
2014-2023
Overvoltages are brief and significant increases in the voltage level an electrical system. They can be caused by a variety of factors, but most common associated with atmospheric discharges (lightning). When lightning strikes power line, resulting shock wave induce surges equipment that is connected to including transformers. The authors develop analytical method order determine maximum values overvoltages propagating transformer windings case impulse. It considered transmitted consist...
This paper presents a study of electromagnetic shielding materials for frequency range under 1 GHz. Optimal will be achieved taking into consideration the quality effectiveness, where attenuation occurs, costs production achieving material and itself. The new have capacity to achieve both low-frequency high shielding, they can used individual electronic electrical equipment, as well overall certain rooms or buildings. approached assessment degree materials, effectiveness was analyzed two...
This paper presents a shielding effectiveness evaluation for some metallic threads materials. The tests were performed using non-standardized method in dual transversal electromagnetic cell (DTEM). materials' characteristics must be properly evaluated order to choose an appropriate material. conducted three different types of material designated shielding. with which uses simple and economical setup, only two components: DTEM EMI Test Receiver. In comparison the standardized methods, one...
This paper presents some aspects on measurements of radiated emission from a Laptop. The used Standards are presented and discussed. were carried out in Semi-Anechoic Chamber (SAC) accordance with EN 55022 (CISPR 22) Standard. test arrangement was IEC 61000-4-3 Standard the following equipment included: reception antenna, signal generator antenna. made at distance 3 meters, according to generic 61000-6-3. electromagnetic interference (EMI) assessed frequency domain, for range 30 MHz-1 GHz,...
The paper deals with the immunity for radiated emissions and compliance international standards electromagnetic compatibility (EMC) measurements. EMC GTEM Cell, Cell construction, model, generation distribution of electric magnetic field inside equipment under test (EUT), emission measurement scheme, are presented. Mobile phone against in 250 was developed. procedure performed specialized software "EMC 32" "GTEM3 IMMUNITY." results revealed a good agreement existing standards, validated...
This study presents issues related to electromagnetic pollution and the level of magnetic field radiation occurring around conductors used for electricity transmission distribution. The fact that modeling simulation are most efficient methods optimization, considering cost–benefit ratio, was premise this work. paper proposes performance a complex analysis, carried out in comparative manner, which includes physical tests simulations existing distribution cables transformer substations. In...
Inrush current is still a persistent problem affecting the quality of power system. This paper presents theoretical aspects this transient phenomenon, simulation phenomenon for prediction purposes and its measurement in test laboratory. In operation transformers, there may also be cases where electrical phenomena transformers overlap. When are operation, their includes study describing such situation, maximum value inrush amplified by fact that series resonance condition has been met. The...
Abstract: This paper presents a method of testing some connection elements used in the construction OHL - overhead power lines. The clamps during thermal cycles was carried out accordance with provisions SR EN 61284:2000 standard, corresponding to IEC 61284:1997, and results obtained after are presented. It can be seen that this type test provides beneficiaries essential information regarding state equipment, allows estimation an optimal duration equipment's operation.
To reduce electromagnetic disturbances and to ensure protection against interference, current research aims produce lightweight low cost absorbent materials. In this sense, companies are looking for innovative, environmentally friendly economical solutions the production of high quality products interferences. As a result, Faraday flexible enclosures made highly conductive textiles polyester with cooper nickel were manufactured. These used compatibility experiments as well people. This paper...
The paper presents a study on the degree of electromagnetic field exposure workers in electric power distribution stations. For this purpose, they performed series tests electricity transmission cables used transformer Based results obtained from experimental testing carried out, levels to influences and magnetic fields existing area where these are located were determined. This is interest because maximum limits regulated by Decision Romanian government HG 520/2016 July 20, 2016 Directive...
This work presents aspects related to the protection that must be provided workers against safety and health risks when they are exposed electromagnetic fields. A series of experimental determinations carried out in compatibility (EMC) laboratory presented. The purpose tests is determine level field registered room under conditions where measurements not out. We considered dedicated testing equipment was turned off during experiments. measured check if it exceeds maximum limit imposed by...
This paper presents some aspects regarding the electromagnetic field distribution modeling within an anechoic chamber lined with different radio-frequency absorbing materials, according to Faraday cage principle. In order model of inside chamber, CST Studio Suite simulation software was used. The performed for two types absorbers: 3650-40- ML and 3650-50-CF. After analyzing results obtained from distribution, it observed that frequency range 1 GHz -:- 4 performance 3650-40-ML material is...
The paper deals with the designing of a flue gases filtering equipment (electrofilter) for 330 MW power group from thermal plant that uses coal as fuel. advanced was performed using software MathCAD. In are presented economic issues on cost but also operation electrofilter's electrical equipment.
The paper deals with the shielding effectiveness for electric field in an anechoic chamber. A brief description of chamber geometric model related to walls is provided. Previous experiments proved that most problems appeared at joints (doors, supplying panels, ventilation cables etc). Therefore, this study focused on studied door and one panels. simulation addressing was accomplished specialized software - CST Studio Suite®. Data obtained through numeric simulations are compared experimental...
The design process of a rectangular waveguide pyramidal horn antenna is carried out. A mathematical algorithm developed and implemented in Matlab. model built afterwards, accounting for the same computed parameters, with two different dedicated simulation software packages: CST Microwave Studio ANSYS HFSS. Both are based on Finite Element Method (FEM). inputs gain operating frequency, hence dimensions b feed waveguide. better voltage standing wave ratio (VSWR) aimed. task to determine...
This paper presents some aspects regarding the electromagnetic field distribution modeling within a shielded enclosure lined with radio-frequency absorbing materials. In order to model of inside chamber, CST Studio Suite <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> simulation software was used. A 1 m side cubic geometry built. It desired study its behavior at different frequencies in determine shielding performance. Both density on...
This paper presents aspects related to the efficient measurement of screens a Faraday metal enclosure. Shielding enclosures or shielded rooms were used protect against radiated electromagnetic threats such as interference, high-altitude pulse, high power electromagnetics including intentional interferences and so on. The function shielding for protecting critical equipment system field is compromised by those apertures on Certain obtained results are presented in frequency range which...
This paper presents aspects regarding the measurement technique in order to implement recommendations for evaluating absorption of radio-frequency (RF) signals, according IEEE Std. 1128-1998(R2012). To characterize properties materials used field signal absorption, standard recommends several test methods, opting arch method. A type RF absorber with pyramidal geometry was tested, measurements being carried out frequency range 3 - 5 GHz, horn antennas. without absorbents first performed...
This paper presents aspects related to the electromagnetic shielding materials used in construction of various types specialized field (EMC) test site. Important machine process and how make shield are also presented. Five different composite presented from point view their structure. They have been tested according specific standard IEEE Std 299:2006. The effectiveness five architectural was calculated for each material separately, then compared. tabular presentation results made order...