COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 32 Issue 3

Full wave numerical modelling of terahertz systems for nondestructive evaluation of dielectric structures

The purpose of this paper is to describe the full‐wave modelling of pulsed terahertz systems utilized in non‐destructive testing.

The application of chaotic PWM control for EMI suppression

Four‐quadrant AC‐DC converters are one kind of the most common and popular AC‐DC converters, which are serious EMI sources. The purpose of this paper is to propose a novel control…

Controller design for an electric power steering system based on LQR techniques

This paper aims to present a linear quadratic regulator (LQR) employed to improve performance of an electrical power steering (EPS) system.

M×N‐ary chaotic pulse‐width‐position modulation: An effective combination method for improving bit rate

This paper presents and investigates a method named M×N‐ary chaotic pulse‐width‐position modulation (CPWPM) which is based on the combination of M‐ary chaotic pulse‐position…

Transient electromagnetic field, losses and forces in a synchronous turbogenerator rotor

The paper seeks to present a methodology of computer simulation of 3D transient electromagnetic fields, losses and forces due to negative sequence currents in fragments of large…

Determining the active and reactive power range in AC circuits

The purpose of this paper is to suggest a polynomial complexity method for determining the range of the active and reactive power consumed in AC uncertain parameter circuits whose…

A knowledge‐supported improvement of the PSO method

The Particle Swarm Optimization (PSO) method makes few or no assumptions about the optimization problem at hand and is applicable without much information about the problem…

Advanced adaptive algorithms in 2D finite element method of higher order of accuracy

The paper presents the principal elements of automatic adaptivity built in our 2D software for monolithic solution of multiphysics problems based on a fully adaptive finite…

Characteristics study of an electronic systems design strategy

This work seeks to present the theoretical study considerations and the characteristics of a general design methodology in optimal time for electronic systems using numerical…

Exact and Physical‐Optics analysis of the electromagnetic scattering by an elliptic cone

The purpose of this paper is to compare exact and Physical‐Optics‐approximated results of the electromagnetic field scattered by a perfectly conducting semi‐infinite elliptic cone…

Multi‐moment statistical characterization and nonlinear filtering of chaos

The purpose of this paper is to provide the results of investigation of multi‐moment statistical characteristics of chaos and apply them to improve the accuracy of nonlinear…

On the improved computational speed and convergence of the Newton Raphson iteration method for selective harmonics elimination PWM applied to cascaded multilevel inverter with equal and non‐equal DC sources

This paper proposes an improved algorithm to compute selective harmonics elimination pulse width modulation (SHEPWM) angles, based on the Newton‐Raphson (NR) iteration for…

MATLAB implementation of the complex power flow

The purpose of this work is that of providing the guidelines of an efficient implementation of power flow computations using the MATLAB computation environment.

Potential and field of a homogeneous magnetic spheroid of arbitrary direction in a homogeneous magnetic field in Cartesian coordinates

The purpose of this paper is to present new expressions in Cartesian coordinates for the potential and magnetic field of prolate and oblate spheroids with arbitrary direction of…

Determination of correction coefficients of the slot leakage inductance for multi‐phase machines

The part of the stator leakage inductance whose quantity changes with the coil pitch is the slot leakage inductance. The purpose of this paper is to determine an analytical…

Optimal design of electrical machines: mathematical programming formulations

The purpose of this paper is to investigate the impact of different mathematical formulations of the problem of optimal design of electrical machines on the results obtained using…

Uniformity analysis of magnetic field in an electromagnetic cold crucible used for directional solidification

The purpose of this paper is to introduce a numerical calculation method to study the uniformity of the magnetic field in a cold crucible used for directional solidification (DS…

Weak limits and their calculation in analog signal theory

This paper aims to improve the mathematical justification of certain analog signal theory concepts and offer a rigorous framework for it.

Fast evaluation of the lightning electromagnetic field in the time domain with an adaptive piecewise approximation of channel base current

A fast algorithm is proposed to calculate the lightning electromagnetic field over a perfectly conducting earth surface.

The fuzzy correlation approach in operation of electrical distribution systems

The purpose of this paper is to introduce a method based on the fuzzy correlation for modelling of active and reactive powers from the substations of the electrical distribution…

Parallel computing applied to inductance calculation for flexible inductors

The motivation for this research work is the need for an efficient software tool for inductance calculation of components in flexible electronics. A software package PROVOD has…

Estimation of parameters in the state space model of stochastic RL electrical circuit

The purpose of this paper is to consider the stochastic differential equation of the RL electrical circuit as the dynamic model of a state space system when the current in the…

Analysis and calculation of slot leakage reactance in the stator bar strands of deficient transposition

The purpose of this paper is to introduce an analytic method to calculate the slot leakage reactance of stator bar strands in alternative current machines whose stator windings…

Numerical investigation of a high order hybridizable discontinuous Galerkin method for 2d time‐harmonic Maxwell's equations

This work is concerned with the development and the numerical investigation of a hybridizable discontinuous Galerkin (HDG) method for the simulation of two‐dimensional…

A reversible flux linkage model of the switched reluctance motor with rotor position computable

The purpose of this paper is to present a reversible flux linkage model of the switched reluctance motor so that the rotor position can be computed analytically.

Modeling of jitter in bang‐bang clock and data recovery circuits

Bang‐bang clock and data recovery (BBCDR) circuits are hard nonlinear systems due to the nonlinearity introduced by the binary phase detector (BPD). The specification of the CDR…

Recent advances in nonlinear dynamics with selected applications in electrical engineering