COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 17 Issue 5

Fluxoid dynamics methods for electromagnetic phenomena of superconductors

Kenzo Miya, Kazuyuki Demachi, Kentaro Takase

In this study the numerical method was developed to simulate behavior of the fluxoids in NbTi and Bi‐2212. The method was named the Fluxoid Dynamics (FD) method, and is based on a…

Time harmonic eddy currents in non‐linear media

Gerhard Paoli, Oszkár Bíró

One way to deal with non‐linearity in the case of time harmonic excitation of the electric and magnetic fields in ferromagnetic media is to introduce an effective material to…

Three‐dimensional coupled thermo‐magnetic analysis of toroidal field coils of resistive high field tokamaks by FEM

P. Alotto, P. Molfino, G. Molinari, M. Nervi, R. Orlando

In this paper a code for the solution of nonlinear thermo‐magnetic problems, arising in the transient analysis of thermal and electromagnetic fields in resistive toroidal field…

A boundary element analysis of magnetic shielding for electron microscopes

H. Igarashi, A. Kost, T. Honma

This paper describes a boundary element analysis of magnetic shieldings for electron microscopes. Since the thickness of the shielding layer is considerably small compared with…

Examination of optimal design method using die press model (problem 25)

N. Takahashi, M. Natsumeda, M. Otoshi, K. Muramatsu

Factors affecting convergence of the simulated annealing method are investigated using an actual model. The convergence characteristics of various optimization methods are…

Application of higher‐order spectra for signal processing in electrical power engineering

T. Lobos, Z. Leonowicz, J. Szymanda, P. Ruczewski

During recent years, higher order statistics (HOS) have found a wide applicability in many diverse fields, e.g. biomedicine, harmonic retrieval and adaptive filtering. In power…

Integral boundary conditions in FEM approaches with the minimization of constitutive error

R. Fresa, R. Martone

A method based on the minimization of the constitutive error has been successfully applied to finite element formulations of Maxwell equations. Error based techniques present a…

Analysis of drifting charged aerosols from HVDC ionizers via a hybrid CSM‐FD method

Marco Angeli, Ermanno Cardelli

In this paper are summarized our research activities dealing with the theoretical and experimental analysis of high voltage direct current (HVDC) ionizers. We present here the…

Topology and performance of superconducting magnetic bearings

W.‐R. Canders, H. May, R. Palka

The paper presents different topologies of inherent stable magnetic support systems consisting of monolithic high temperature superconductors (HTSC) and permanent magnets (PM)…

Irreversible thermodynamics and thermal noise of non‐linear networks

Laurens Weiss, Wolfgang Mathis

The conventional treatment of thermal noise is based on Nyquist’s theorem. This theorem has only been derived for linear, reciprocal (we define “reciprocal networks” as networks…

Separation of crackles and squawks from vesicular sounds using a wavelet‐based filtering technique

Leontios J. Hadjileontiadis, Dimitrios A. Patakas, Nikolaos J. Margaris, Stavros M. Panas

An automated way of revealing the diagnostic character of discontinuous adventitious sounds (DAS), i.e. crackles and squawks, by isolating them from vesicular sounds (VS), based…

Shape recognition using FFT preprocessing and neural network

Dinh Nghia Do, Stanislaw Osowski

The paper presents the application of neural network to the classification of the closed contours forming different shapes. The shape is represented by ‐ samples of complex…

3D eddy current computation with edge elements in terms of the electric intensity

N.A. Golias, C.S. Antonopoulos, T.D. Tsiboukis, E.E. Kriezis

A finite element formulation for the solution of 3D eddy current problems in terms of the electric intensity E is presented. A weak formulation, based on a Galerkin weighted…

Recent experiences on mixed finite elements for 2D simulations of magnetic fields

P. Di Barba, I. Perugia, A. Savini

A mixed formulation of two‐dimensional magnetostatic problems, where both B and H are unknowns, is considered. The solution is obtained by minimizing the residual of the…