COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 13 Issue 1
Table of contents
CAD IN ELECTROMAGNETIC FIELD ANALYSIS
R. Belmans, W. Geysen, E. FreemanElectromagnetic problems The electromagnetic theory has been fully developed into a mathematical equation system by Maxwell in which he succeeded to explain all physical…
GEORGE GREEN — MILLER AND SELF‐MADE MATHEMATICIAN FROM NOTTINGHAM
Andrzej KrawczykIn 1993 the 200th anniversary of George Green, a great physicist and mathematician's, birth was celebrated. His contribution to world's science is beyond the question. This can…
EDDY CURRENT IMAGING — A THEORETICAL APPROACH
M. GramzEddy current imaging is a relatively new technique of electromagnetic nondestructive testing that makes possible an accurate geometrical characterization of flaws. On contrary to…
EDDY CURRENTS MODELING BY USING ANALYTIC ELEMENTS
A.G. Kladas, J.A. TegopoulosSome problems involve eddy currents developed in thin skin effect depths and a numerical analysis, based on the classical finite element method, is extremely laborious and…
CONTRIBUTION TO THE ELECTROMAGNETIC FIELD ANALYSIS IN A THIN CONDUCTING PLATE
Stanislaw Apanasewicz, Marceli Kaźmierski, Igor KerszIn the paper, basing on the electromagnetic field analysis in a system with a thin conducting plate, infinitely extended, a set of equations approximately representing the…
SOME APPLICATIONS OF INTEGRAL EQUATIONS FOR 2‐D ELECTROMAGNETIC FIELD ANALYSIS
Stanislaw ApanasewiczIn presented paper the algorithm for 2‐d electromagnetic field calculation using the simple layer potential is describing. Owing to the simple operation — the location of lines of…
MAGNETIC FIELD COMPUTATIONS IN THE INTERIOR AND EXTERIOR REGIONS BY USING INFINITE ELEMENTS
Stanislaw Gratkowski, Marek ZiółkowskiThis paper describes numerical tests for a three dimensional infinite element suitable for finite element modelling of open boundary field problems. The infinite element has four…
SPECIAL FINITE ELEMENTS FOR EFFICIENT COMPUTATION OF MAGNETIC HELD IN r‐z AND r‐φ GEOMETRY
Stanislaw GratkowskiThis paper presents ‘infinite’ finite elements for magnetic field problems with open boundaries in r‐z and r‐φ geometries. The formulations of the elements are so simple that…
THE INTEGRATION OF FUNCTIONS WITH SINGULARITIES IN BOUNDARY ELEMENT METHOD FOR POISSON'S EQUATION
Ming Yu, E. KuffelIn boundary element method, we almost always have to integrate functions with singularities. The treatment of singularity is not particularly difficult for a line integration…
A NEW APPROACH TO NUMERICAL FIELD AND POTENTIAL CALCULATIONS
Allen NussbaumA. Conformal Transformation Methods A standard analytic method for the determination of field and potential distributions uses the Schwarz‐Christoffel (SC) conformal…
3D SCALAR OR VECTOR MAGNETIC FIELD — HOW ONE CAN SEE IT
Marek ZiólkowskiThe paper presents the features of an interactive “cube lens” approach to overcome some problems of visualization of 3D scalar or vector magnetic field. The “cube lens” is defined…
NUMERICAL CALCULATION OF THE ELECTROMAGNETIC FIELD IN STRATIFIED MEDIA OF PLANAR OR CYLINDRICAL GEOMETRY
C.S. Antonopoulos, E.E. KriezisA boundary element technique is applied to an integral formulation of the electromagnetic field quantities, of the electric vector and magnetic scalar potentials for the…
SOLUTION OF TEAM WORKSHOP PROBLEM 7 BY RELUCTANCE NETWORK METHOD (ASYMMETRICAL CONDUCTOR WITH A HOLE)
S. Wiak, A. Pelikant, J. TurowskiThis paper presents the numerical solution of the TEAM Workshop Problem 7 obtained by Reluctance Network Method (RNM). The problem represents a three‐dimensional multiply…
NUMERICAL INTEGRATIONS IN THE BEM FORMULATION WITH E AND H FOR 3‐D EDDY CURRENTS
Jinxing Shen, Jiansheng Yuan, Arnulf KostThe computation of 3‐D eddy current problems is an important topic both in theoretical and engineering areas. Based on Green's theorem, Kost theoretically developed a BEM…
COIL INDUCTANCE DEPENDENT ON SCREEN AND CORE PLATES
K. Pawluk, U. Krauze, M. KucharskaMetallic elements placed in the vicinity of coils and conducting rings exert an influence on the inductance of them. Authors' BIMS package based on the boundary‐integral approach…
THREE DIMENSIONAL MAGNETIC FIELD ANALYSIS IN A LINEAR MOTOR BY MEANS OF SCALAR POTENTIAL
K.M. GawrylczykThe field of magnetic levitation by ferromagnetic attraction in conjunction with a linear propulsion system has experienced interest for many years. The increasing capacity of…
COUPLING OF ELECTRIC AND MAGNETIC EQUATIONS IN ELECTROMAGNETIC DEVICES WITH FINITE ELEMENT METHOD
Stefan Bouissou, Francis PiriouTo extend the field application of numerical simulation, it is necessary in many applications to consider the electric circuit. Usually the magnetic equations are solved using the…
THREE‐DIMENSIONAL ADAPTIVE MESH REFINEMENT IN FINITE ELEMENT COMPUTATIONS OF ELECTROMAGNETIC FIELDS
C Li, Z. Ren, A. RazekIn the applications of FEM. a compromise between the accuracy and the computation cost is often required, especially when 3D cases are concerned Adaptive mesh refinement is a good…
NUMERICAL METHODS FOR CALCULATING THE MECHANICAL BEHAVIOR OF ELECTROMAGNETIC DEVICES
Andreas KahnertA method for calculating the displacement of a moving armature and additional masses in an electromagnetic device is presented. The transient magnetic field is calculated…
APPLICATION OF 3‐D FINITE DIFFERENCE METHOD FOR INDUCTANCE CALCULATION OF AIR‐CORE COILS SYSTEM
K. Zakrzewski, M. LukaniszynThe paper deals with the inductance calculation of air‐core coils system by means of 3‐D analysis of magnetic field of the coils with rectangular cross‐section. The possibility of…
3‐D CALCULATION OF ZERO‐COMPONENT FLUX IN THREE‐PHASE THREE‐COLUMN TRANSFORMER
K. Zakrzewski, B. TomczukThe paper discusses the problem of space distribution of zero‐component magnetic flux generated in three‐column transformer. For 3‐D magnetic field calculation the method of…
ELECTROMAGNETIC FIELD CALCULATION OF A LEAKAGE TRANSFORMER BY MEANS OF FINITE ELEMENT METHOD WITH HERMITIAN ELEMENTS
K. Komeza, S. WiakThis paper deals with the field and leakage reactance calculations in the model leakage transformer. The approximate solution for 3‐D problem, made by composing 2‐D solutions for…
ADDITIONAL LOSSES IN OVERLAPPING AREA OF TRANSFORMER CORE
Ante Rezic, Zvonomir ValkovicThe influence of overlap length and overlapping design on core loss and magnetizing current of single‐phase two‐leg transformer core has been investigated The investigation was…
3‐D HYBRID ANALYTICALLY‐NUMERICAL COMPUTATION OF TANK LOSSES IN 3‐PHASE POWER TRANSFORMERS
J. Turowski, M. Kopeć3‐D Reluctance Network Method has proved as an effective, experimentally verified method of an evaluation of leakage fields and interactive design of screens. Though relative loss…
COMPUTATION OF 3D EDDY CURRENT FIELDS AND LOSSES DUE TO LEADS IN A LARGE POWER TRANSFORMER
Chen Yongbin, Yang Junyou, Yu Hainian, Tang RenyuanBoundary element method(BEM) is applied to computation of 3D eddy current fields due to heavy current leads in a 360MVA/500kV power transformer. To improve numerical accuracy…
FINITE ELEMENT ANALYSIS OF INDUCTION GENERATOR TRANSIENTS
A. Demenko, L. Nowak, B. PlachtaThe time‐stepping finite element method for the analysis of the electromagnetic transients in the induction generator working in isolation has been presented. The transients in…
ELECTROMAGNETIC FIELD THEORY AS A BASIS TO THE ANALYSIS OF SWITCHED RELUCTANCE MOTOR DYNAMIC
A.Pelikant PhD MScIn this work author proposed complex alghorithm where field and circuit parts are strictly linked so that circuit and mechanical parameters are calculated strictly. In this case…
TRANSIENT SIMULATION OF PERMANENT MAGNET DC COMMUTATOR MOTORS USING THE FINITE ELEMENT APPROACH
M. Wing, J.F. GierasThe transient performance of permanent magnet dc commutator motors has been simulated using a two dimensional finite element model. The simulations of start‐up characteristics and…
END COMPONENT OF STATOR LEAKAGE REACTANCE OF SQUIRREL CAGE INDUCTION MOTORS: Part 1. General analysis
P.P. Yannopoulos‐Lascaratos, J.A. TegopoulosThe leakage reactance end component is calculated by considering the net flux linking the stator end winding when both stator and rotor are excited with currents so that the net…
END COMPONENT OF STATOR LEAKAGE REACTANCE OF SQUIRREL CAGE INDUCTION MOTORS: Part 2. Flux densities
P.P. Yannopoulos‐Lascaratos, J.A. TegopoulosMaximum axial and radial flux densities due to peripheral stator current The flux desnity, Bsper, is found by using the Biot‐Savart law expressed in cylindrical coordinates. Thus
MULTI‐LAYER MODELLING OF COMPOSITE STATOR CORE STRUCTURES IN LARGE TURBOGENERATORS
V.I. PostnikovA new design of turbogenerator's stator core is being proposed involving the nonmagnetic and nonconducting high‐strength material shells. It is expected to enhance the machine's…
DETERMINATION OF STEP MOTOR PARAMETERS WITH MAGNETIC FIELD SOLUTION
Dipl Ing. Juraj Wagner, PhD assoc prof, Dušan Maga, Renata Führichová, Dipl Ing Roman Guba, Jozef OpaternýIn our contribution we deal with the optimization of the magnetic circuit design of the high torque step motor by numerical solution of the motor magnetic field (the Finite…
OPTIMAL SHAPE DESIGN OF A DC TORQUE MOTOR
P. Di Barba, A. Savini, F. Arpino, P. NavarraThe optimal design of a small dc torque motor, acting as a position actuator, is considered. The magnetic field is simulated by means of a 2‐D finite element model, taking into…
ANALYSIS OF THE MAGNETIC FIELD OF A DC MACHINE
Juraj Wagner, Vltězslav Hájek, Renata Führichová, Dušan Maga, Dipl Ing Roman Guba, Dipl Ing Jozef OpaternýThe analysis of the magnetic field and computation of the leakage magnetic flux is important for optimum design of the motor, especially for the small machines on low voltage…
MOVING FERROMAGNETIC ELEMENT INFLUENCE ON SUPERCONDUCTOR SEPARATOR MAGNET
Antoni Cieśla, Andrzej MatrasIn the paper a field model of superconductor matrix separator is shortly presented. It allows to determine the electromagnetic induction voltage value in magnet winding during…
SYSTEM FOR COMPUTER AIDED DESIGN AND OPTIMIZATION OF ELECTROMAGNETIC ACTUATORS
L. Nowak, A. Demenko, W. SzelagSystem contains units which are the tools for the actuators designs, optimization and steady‐states or transients simulation. Design and optimization process has been based on the…
THE ACCURACY OF CALCULATION OF MAGNETIC FIELDS, INDUCTANCE AND FORCES IN ELECTROMAGNETIC DEVICES USING THE RELUCTANCE NETWORK METHOD (RNM)
Jacek WOROTYŃSKI, Marek TUROWSKI, Ernest A. MENDRELAAmong the many calculation methods that allow the evaluation of magnetic field in different electromagnetic devices is the Reluctance Network Method (RNM). It is based on network…
FORCE OPTIMIZATION IN DC ACTUATORS
Y.B. Cheng, J.K. Sykulski, R.L. StollThe use of electrohydraulic systems is becoming more widespread in industry. The control valve forms a vital component of any such system as it performs both power conversion and…
GENERIC FIELD PROBLEMS IN DESIGN STUDIES OF HIGH TEMPERATURE SUPERCONDUCTING TRANSFORMERS
MR Harris, RL Stoll, JK SykulskiA feasibility study for a large power transformer reveals several key design issues, each of which is expressible in terms of simple, fundamental field effects. Six generic…
THE INFLUENCE OF JOSEPHSON CURRENTS ON MAGNETIZATION AND THE CURRENT‐VOLTAGE ANOMALIES IN HIGH TC SUPERCONDUCTORS
Jacek SosnowskiIn the paper is analyzed the influence of Josephson's junctions array on the transport current and magnetic properties of the high temperature ceramical, granular superconductors…
VERIFICATION OF THREE‐DIMENSIONAL MAGNETIC FIELD DISTRIBUTION
Ryszard Sikora, Tomasz Chady, Mieczyslaw Komorowski, Marek ZiółkowskiDevelopment in microcomputer systems has led to their use for a three‐dimensional magnetic field calculation. It caused a great progress in numerical methods used for a magnetic…
DETERMINATION OF PERMANENT MAGNET CHARACTERISTICS BY SINGLE‐SHOT TEST
Zdzisław Źycki, Eugeniusz SokolnickiThe authors presents mathematical models of hysteretical relations of main magnetic parameters in pulse measuring procedures. Fragments of hysteresis loop specific for assessment…
ANALYTICAL CALCULATION OF TRAVELLING WAVE INDUCTION HEATING SYSTEMS
F. Dughiero, S. Lupi, P. SiegaIn this paper an analytical method, based on Fourier's series, which allows to determine the eddy currents distribution in travelling wave induction heaters with cylindrical…
TRAVELLING WAVE INDUCTION HEATERS WITH COMPENSATING WINDINGS
VV Vadher, IR SmithA major cause of the relatively low power transfer to the load on an induction heater, of either the pulsating or travelling field type, is the low magnetising reactance due to…
MODELING OF VLSI INTERCONNECT
J. PoltzDigital systems utilize frequencies into the GHz range Attempts to reduce the propagation delay by lowering the interconnect capacitance (decreasing cross‐sectional dimensions…
TRANSMEMBRANE VOLTAGE DUE TO ELECTROBIOLOGICAL INTERACTIONS
Andrzej Krawczyk, Tadeusz SkoczkowskiThe interactions of electromagnetic fields and biological structures are of great interest both from medical and technological points of view. The medical aspect is well‐known…
ESTIMATION OF THE ELECTRIC STRENGTH OF INSULATION SYSTEM ELEMENTS USING NUMERICAL METHODS
E. Leśniewska, I. Borowska‐BanaśIn the paper, some cases of using HV insulator in SF6 gas medium are discussed. Computations, permitting to optimize the insulation system geometry and to make use of the HV…
ANALYSIS OF LIGHTNING ELECTROMAGNETIC FIELDS
ALEXANDRE PIANTINI, JORGE M. JANISZEWSKILightning discharges are considered to be responsible for a significant amount of interruptions in power distribution systems. Due to the importance of this subject, a research on…
ISSN:
0332-1649Online date, start – end:
1982Copyright Holder:
Emerald Publishing LimitedOpen Access:
hybridEditor:
- Prof Jan Sykulski