COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 25 Issue 3

100th anniversary of Albert Einstein's papers with regard to field theory

This paper aims to celebrate the 100th anniversary of Einstein's works, published in 1905.

Open tools for electromagnetic simulation programs

The aim of the paper is to propose three computer tools to create electromagnetic simulation programs: GiD, Kratos and EMANT.

Accuracy improvement in nonlinear magnetostatic field computations with integral equation methods and indirect total scalar potential formulations

The paper seeks to solve nonlinear magnetostatic field problems with the integral equation method and different indirect formulations.

3D topology optimization of magneto‐thermal systems

This research aims to present a 3D multi‐objective approach regarding both magnetic and thermal characteristics associated with design of actuators.

Magneto‐electric network models in electromagnetism

The aim of this paper is to develop network models of an electromagnetic field containing both eddy and displacement currents. The proposed network models provide good physical…

Time domain sensitivity analysis of electromagnetic quantities utilising FEM for the identification of material conductivity distributions

This paper aims to present effective methods for computing electromagnetic field sensitivity in the time domain versus conductivity perturbations in finite elements.

A fast evolutionary‐deterministic algorithm to study multimodal current fields under safety level constraints

This paper aims to design an algorithm able to locate all the possible dangerous areas generated by the leaking of a fault current in a grounding system (i.e. the areas where the…

Modelling of magnetic anisotropy in the finite element method

The aim of this paper is to present an approach, able to deal with different models for anisotropy in the finite element method, and how it can be integrated in its formulation.

Reconstruction of crack profile using fuzzy logic

The aim of the paper is to develop an algorithm based on fuzzy logic (FL) systems for reconstructing cracks shapes, which will be faster and simpler to learn than neural networks…

Synthesis of boundary conditions in a subdomain using the numerical Schwarz‐Christoffel transformation for the field analysis

The paper seeks to present a methodology using the numerical Schwarz‐Christoffel (SC) transformation in order to extract a subdomain from a simply‐connected source‐free…

Computation of general nonstationary 2D eddy currents in linear moving arrangements using integrodifferential approach

Most eddy current problems are solved using numerical schemes based on the differential approach. Nevertheless, there exist several classes of tasks where use of this approach may…

Three‐dimensional finite element modeling of inductive and capacitive effects in micro‐coils

The paper seeks to develop dual 3D finite element (FE) formulations for modeling both inductive and capacitive effects in massive inductors, in particular micro‐coils. The paper…

Absorbing boundary conditions for compact modeling of on‐chip passive structures

The paper has the purpose of proposing a new open boundary condition to be used in conjunction with the finite integration technique (FIT) for the modelling of passive on‐chip…

Wide frequency band analysis of an antenna by finite elements

The aim of this paper is to calculate the impedance of a loop antenna, etched on a dielectric substrate, over a wide frequency band using finite element method (FEM).

Application of Spice simulator in the evaluation of crosstalk computational models

This paper aims to present an evaluation of the crosstalk models developed for a shareware version of Spice.

Rigorous ADI‐FDTD analysis of left‐handed metamaterials in optimally‐designed EMC applications

The paper seeks to investigate the precise time‐domain modelling and broadband performance optimisation of 3D EMC structures formed by composite left‐handed metamaterials.

Comparison of numerical and measurement methods of SAR of ellipsoidal phantoms with muscle tissue electrical parameters

The assessing of the specific absorption rate (SAR) of living organisms or phantoms is difficult to realize and this paper seeks to do this. SAR much more precisely describes the…

Numerical modeling of 3D intelligent comb drive accelerometer structure: Mechanical models

This paper aims to focus on the numerical modelling of 3D structure of surface micromachined (MEMS) accelerometers.

Finite element analysis of an outer‐rotor permanent‐magnet brushless DC motor for light traction

Aims to study a new outer‐rotor permanent‐magnet brushless DC motor by means of the finite element method.

Computation of eddy current losses in the mounting rail of a magnetically levitated conveyor vehicle

The paper proposes presenting a transient 3D‐FE computation approach of the eddy current losses in the rail and the flux concentrating pieces of a magnetically levitated conveyor…

Permanent magnet synchronous motor with exterior‐rotor: Distributed or concentrated windings – motor performance comparison

The paper aims to present the comparison between the performances of the exterior‐rotor permanent magnet synchronous motors with distributed windings and the performances of the…

Improvements in a method to characterize soft ferrite up to high frequencies

This paper aims to show a low‐cost and easy to use measurement method for characterizing magnetic material B(H) relation up to medium frequencies providing an acceptable overall…

Design of magnetically levitated 2D drive

The paper aims to introduces a design of a planar motor with six degrees of freedom (dof).

The influence of demagnetisation and temperature on the performance of PM machines

The paper seeks to present finite element methods for modelling hard magnetic material magnetisation and degradation “in service”. It aims to describe methods of representing the…

Effects of coil current phase on eddy current loss of permanent magnets in IPM motors

Aims to investigate the eddy current loss in permanent magnets of IPM motors.

EasyMAG – magnetic field toolbox calculator for electrical installation project

This paper aims to present a software application, called EasyMAG, for simulating and calculating the magnetic field during the design of domestic/industrial electrical…

Preface