COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 17 Issue 6

Hysteresis modeling

Edward Della Torre

In the modeling of transducers, especially magnetic transducers, hysteresis may affect performance. Hysteresis models have been improved greatly and are capable of modeling a…

Microwave interdigital bandpass filters modeling

Sladjana Ivkovic, Bratislav Milovanovic

An improved model for microwave interdigital filters design and analysis is developed by correction of Denig’s procedure (1989). This model enables correct modeling…

Neural network simulation of a pulse magnetiser for magnetising permanent magnets

Marek Rudnicki, Pekka Neittaanmäki, Tapani Jokinen

The paper is concerned with a design and a validation of a neurocontroller for a pulse magnetiser for magnetising permanent magnets. The goal is to register the peak time and…

Performance analysis of locally recurrent neural networks

B. Cannas, S. Cincotti, A. Fanni, M. Marchesi, F. Pilo, M. Usai

Many practical applications of neural networks require the identification of non‐linear deterministic systems or chaotic systems. In these cases the use of a network architecture…

Complementarity by “local corrections”

A. Bossavit, P. Chaussecourte, B. Métivet

By using complementarity (solving for both potentials, scalar and vector), one often can provide bilateral bounds for some quantities of interest, like for instance the reluctance…

Investigation of parallel computation in 3D magnetic field analysis on distributed memory type of multiprocessors containing 296 PUs

N. Takahashi, T. Nakano, K. Fujiwara, K. Muramatsu

The algorithm of parallelized conjugate gradient method for solving large‐scale linear equations is investigated. The performance of the algorithm is evaluated by solving sparse…

Lorentz gauge eddy current formulations for multiply connected piecewise homogeneous conductors

C.F. Bryant, C.R.I. Emson, P. Fernandes, C.W. Trowbridge

Vector potential formulations of Maxwell’s equations need to be gauged, otherwise nodally based finite element approximations lead to an ill conditioned linear system. In this…

Stability analysis of equilibrium states of a certain class of non‐linear dynamic circuits

Michal Tadeusiewicz

Dynamic non‐linear circuits driven by DC voltage and current sources are considered in the paper. The problem of identification of asymptotically stable equilibrium states is…

A procedure for magnetic design and optimization of permanent magnet brushless DC motors

J.K. Sykulski, M. Santilli

The paper reports on a development of an automated CAD optimization system which interfaces an external design routine with a general purpose finite element software. The magnetic…

Design of efficient codes for the AWGN channel based on decomposable binary lattices

Stefano Calabrò, Matteo Campanella, Giovanni Garbo

This work is concerned with the use of binary decomposable lattice codes over the QAM Gaussian channel. First, we investigate the structure of such class of lattices: we derive…

A computer‐aided instrument for pattern recognition of partial discharges

Rosario Schifani, Giuseppe Mirelli

In this paper a new computer‐aided digital system for partial discharge (PD) measurements is presented. The system is able to collect a great number of data, up to a pulse…

Conditions for the existence of an X‐point in a magnetic field

Antonio Massarini, Ugo Reggiani

A sufficient condition for the existence of a node (i.e. an X‐point) in lines of a quasi‐static magnetic induction field is proved. The theoretical approach is developed for…

Infinite elements for axisymmetric electrical field problems with open boundaries

Stanislaw Gratkowski

The paper presents infinite elements for axisymmetric electrical field problems with open boundaries. The formulation of the elements is so simple that closed‐form expressions for…

Tabu Search metaheuristic for designing digital filters

A. Fanni, M. Marchesi, F. Pilo, A. Serri

This paper deals with the application of a Tabu Search (TS) metaheuristic to the design of digital filters, with coefficient values expressed as the sum of power of two. The…