B. Hannon, P. Sergeant
Ghent University, Ghent, Belgium
In the field of electric machines, a trend towards both higher efficiency and higher power density is observed. This has led to a growing importance of Permanent Magnet Synchronous Machines. However, the magnets used in these machines risk demagnetization at high temperatures. Especially in machines operated at high speeds. A commonly proposed solution is the shielding cylinder (SC), a ...
S. Majidnia, R. Nilavalan, J. Rudlin
Brunel University, London, United Kingdom
TWI ltd, Cambridge, United Kingdom
Conventional eddy current techniques have been used to a great extent for detection of surface breaking defects in conductive materials. However, detection of sub-surface defects is limited due to the single frequency and skin effect phenomena. Pulsed Eddy Current (PEC) techniques overcome these limitations. This work involves modelling of an encircling coil around a steel pipe with and without ...
R. R. S. Caetano, G. Cernicchiaro, R. M. O. Galvão
Universidade Federal do Rio de Janeiro, Macaé, RJ, Brazil
Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, RJ, Brazil
Instituto de Física USP, São Paulo, SP, Brazil
This paper presents a numerical analysis of magnetic devices, dipole, quadrupole and undulator and a THz Free Electron Laser (FEL) electron-beam recovery system. Free Electron Laser are an important source of coherent radiation being used in the study of chemical properties of substances, thus being an important tool for various fields of science such as condensed matter physics, chemistry, ...
A. T. Clark
Research & Development, WM Robots LLC, Colmar, PA, USA
Soil’s electromagnetic properties adversely affect the performance of electromagnetic induction (EMI) sensors and if conditions are severe enough, render them useless. A simple circuit model is often used to express the electromagnetic induction response of a target analytically. This analytic model produces a response function that contains unique characteristics based on the target’s ...
Arshad , Dr. A. Nekahi , S. McMeekin , M. Farzaneh 
 School of Engineering and Built Environment, Glasgow Caledonian University, United Kingdom
 Canada Research Chair on Atmospheric Icing Engineering of Power Networks (INGIVRE), Université du Québec à Chicoutimi, QC, Canada
Electric field distribution along an insulator surface is of prime importance for the long term performance of insulators. In this paper electric field and potential distribution along a standard 33 kV polymeric insulator were investigated under different pollution conditions. Effect of voltage type and polarity on the electric field and potential distribution under contaminated conditions were ...
D. F. Reis , E. J. da Silva , I. J. S. Lopes ,
 Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
Recent studies report problems related to premature aging and degradation of high-voltage polymeric insulators. Corona activity, which is induced in areas of high electric field levels, is considered one of the leading causes of these problems. The insulator operation under adverse conditions including rain, fog, dew and pollution is affected by these key factors that modify the electric field ...
Massachusetts Institute of Technology, Cambridge, MA, USA
Markus Zahn received all his education at MIT, was a professor in the Department of Electrical Engineering at the University of Florida, Gainesville from 1970-1980, and then joined the MIT Department of Electrical Engineering and Computer Science faculty in 1980. He works in the Laboratory for Eelectromagnetic and Eelectronic Systems, in the MIT High Voltage Research Laboratory, is the Director ...
Topographic Effects on Radio Magnetotelluric Simulations on Levees: Numerical Modeling for Future Comparison With Fields Results
R. Duval, C. Fauchard, R. Antoine
ERA23-IFSTTAR, Laboratoire des Ponts et Chaussées de Rouen, CETE-Normandie Centre, France
We study the topography influence of levees on the electric resistivity signal obtained with the Radio-Magnetotelluric method. Field measurements have been modeled with COMSOL, using the AC/DC and RF Modules. A levee situated in Orléans along the Loire river (France) has been considered in order to design a model tacking account of the skin depth and the incident wavelength, keeping a constant ...
J. Heinonen, M. Erdmanis, I. Tittonen
Aalto University, Department of Micro- and Nanosciences, Espoo, Finland
We present a simplified 3D model that simulates the operation of a linear microscale integrated ion trap. It employs a set of metalized electrodes, which are formed on top of an insulator layer on silicon substrate. The confinement in all three dimensions is provided by the application of the specific AC and DC voltages to the corresponding trap electrodes. The distribution of the trapping ...
Faculty of Technical Science, Novi Sad, Serbia
Power grid voltages and currents may be distorted due to presence of harmonics. Measurements of such voltage with harmonics may be performed using newly developed instrument with a small air-core transformer based probe as the input unit. The probe must be shielded against unknown external electromagnetic fields. At the same time, the probe must remain linear throughout the range of frequencies. ...