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This paper presents a study regarding the conducted electromagnetic emissions of a wireless power system. Due to the fact that in the last few years there have appeared a lot of devices with wireless systems, it must be in accordance to the EMC norms. In this context, were performed tests to ensure that analyzed wireless power system meet the EN 55032 standard limits. Based on the test results, was...
The problem of reducing electricity consumption by using energy saving lamp type LED (Light-Emitting Diode), CFL (Compact fluorescent lamp) or UV (Ultra Violet) took unprecedented proportions in all EU countries. Compared to traditional incandescent lamp, the advantages of energy saving lamps in terms of efficiency that the environmental impact is undisputed. We find this type of energy saving lamps...
Increasing the number of electric/electronic devices powered with electric power, has led to a series of different chargers and a mixture of wires spread through the house or office. For a long period of time, the concept of charging without any direct connection through wires was avoided, but the last few years show an increased interest to make the loading with electrical power more flexible and...
Due to ongoing push of technology to smaller dimensions and higher computational speed of the electronic devices, a higher heat generation on device is obtained, increasing the thermal management challenges. This paper proposes a study of the electro-thermal behavior in electronic power devices and the optimization of the cooling system in order to increase the lifetime of the device. Different heat-sink...
DC Motors are important components for the automotive industry, but they're also a strong electromagnetic interference (EMI) source. Knowing this problem, conducted emission (CE) tests and Voltage Transient Emissions (VTE) tests were carried out along the power lines of the motor according to the standards CISPR 25 and 7637-2. Conducted emissions from the components which are to be placed on an automotive...
Thermo-mechanical stress accumulation in the power electronic integrated circuit (PIC) devices influences their lifetime and reliability. In order to determine both the temperature and the stress accumulation, numerical simulation is a very important tool in the design of PIC devices for quantifying and enhancing their lifetime and reliability. An open source solution integrated in Salome-Meca and...
The paper emphasizes a study regarding the efficiency of the passive loops usage for the mitigation of the magnetic field values in the neighborhood of high voltage overhead power lines. In the first part of the paper the basic principles of the suppression method are introduced. In the second part of the paper analytical computation results are presented and discussed. The efficiency of the proposed...
The electromagnetic field interferences (EMI) can influence both human health and functioning of electrical appliances. An EMI map is an important instrument for monitoring the health exposure limits versus the standards. In order to draw an EMI map measurement methodologies and advanced computational models are required. In case of high voltage (HV) and or medium voltage (MV) substations the numerical...
A study of voltage and current wave distortions on a photoelectric power plant of 17 MW in the hard winter conditions of 2016–2017, with much snow and high frost, is presented. By means of a Isikawa diagram, the authors wish to familiarize the reader with causes of current and voltage wave distortion. The study case is accomplished by measurements in two points, using class A equipment. The obtained...
In this paper the micrometric spiral inductors will be numerically modelled and simulated in order to highlight the effects and phenomena which occur at high frequencies, namely in the frequency domain 1 – 20 GHz. At first the electric and magnetic field values inside the structure of the spiral inductor are represented and analyzed. Also, the specific parameters of these spiral inductors, namely...
This article presents an approach to develop an electrical micro-grid with more than one renewable energy source. The micro-grid is considered as a discrete power system composed of distributed energy sources and different kind of system loads. The loads of the micro-grid can operate in alongside with the grid or can switch to other power system to supply continually the electrical energy, otherwise...
The continuous development of electrical/ electronics/industrial/medical devices which contain inductors leads to increasingly needing the use of the spiral inductors with as higher inductivity as possible, but using implementation spaces as small as possible in the integrated circuit, through dimensions as small as possible of their components (inductors). Thus, in this paper it is proposed to solve...
A two layer ground model for the computation of the earthing systems is presented. The model combines the pipe element method with multiple image technique by using a fundamental solution defined for the two-layered three-dimensional (3D) half space. The model couples two problems: an external one that models the phenomena that occur in the soil — solved with the boundary element method (BEM), and...
In this study we report on the relationship between the field strength (both electric and magnetic components) measured by the exposimeter placed in the upper pocket of a group of subjects equipped with a backpacked military radio transceiver (VHF) and the unperturbed field values at the location of the human body/exposimeter position without the human body present. We propose correction factors for...
The recent advances in computer aided design (CAD) modeling of electromagnetic field distribution in high voltage (HV) substation are presented in this paper. The substation constitutive components (e.g. towers, breakers, circuit conductors, bus bars, transformers, etc.) were built-up by the authors as three dimensional (3D) CAD models and stored in a data base under the SolidWorks CAD environment...
In this article the authors have proposed to present the importance of knowing the laws in force in terms of electromagnetic compatibility by studying electromagnetic conduction disturbances in the supply network. This study is based on two types of lamps and how to reduce these interferences using various filters that reduces electromagnetic interference produced by these lamps. The tests were performed...
This paper proposes a new approach for the analysis of physical processes. Based on several assumptions regarding the information available regarding the physical processes, we constrain the generation of the transition system. The method is based on the theory of regions that allows for the building compact representations as Petri Nets of transition systems and a set of explicit descriptions for...
Underground or above ground metallic pipeline placed in the vicinity of high voltage transmission lines are exposed to AC electromagnetic interference effects. Therefore, at design stage one should determine the proper pipeline right-of-way in order to minimize the level of induced AC current and voltages due to electromagnetic coupling effects, and in the same time to reduce construction costs. A...
Planar transformers are mainly used in power electronics but they can be also found in electric vehicles, medical applications, power sources, rectifiers and other devices. They have a lot of advantages like low profile, which leads to low core losses, higher efficiency, manufacturing repeatability, and reduced electromagnetic interferences. On the other side, there are a few aspects which must be...
One of the most important steps in the design of a new metallic gas pipeline, which will have to share the same distribution corridor with an existing high voltage overhead power line, is to determine the proper right-of-way in order to reduce construction cost and to minimize the level of A.C. currents and voltages induced in the pipeline due to inductive, conductive and capacitive couplings. Therefore,...
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