COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 34 Issue 3

Non-linear inverse problems and optimal design of MEMS

Fostered by the development of new technologies, micro-electro-mechanical systems (MEMS) are massively present on board of vehicles, within information equipment, as well as in…

Uncertainty propagation of iron loss from characterization measurements to computation of electrical machines

The purpose of this paper is to find out how uncertainties in the characterization of magnetic materials propagate through identification and numerical simulation to the…

A correlation of magnetic properties with material density for soft magnetic composite cores

– The purpose of this paper is to examine the relationships between processing conditions and magnetic properties of cores made of Soft Magnetic Composite (SMC) Somaloy 500.

Nonlinear secondary arc model use for evaluation of single pole auto-reclosing effectiveness

The purpose of this paper is to discuss two evaluation methods of single pole auto-reclosing process effectiveness in HV transmission lines. Secondary arc current and recovery…

Synchronization of voltage frequency converters with the grid in the presence of notching

In the dispersed generation system, power electronic converters allow for coupling between energy sources and the power grid. The requirements of Transmission System Operators are…

Influence of non-linear frequency-dependent material properties on the operation of rotating electrical machines

The purpose of this paper is to focus on the frequency-dependent non-linear magnetization behaviour of the soft magnetic material, which influences both the energy loss and the…

Two module electromagnetic launcher with pneumatic assist: Modelling, computer simulations and laboratory investigations

The purpose of this paper is to present a new concept of a multi-module electromagnetic launcher with pneumatic assist. The authors focus on the problem of modelling a two-module…

Effects of saturation and hysteresis on magnetisation dynamics: Analysis of different material models

The purpose of this paper is to provide a comprehensive analysis of different material models when observing the magnetisation dynamics and power losses in non-oriented soft…

A posteriori residual error estimators with mixed boundary conditions for quasi-static electromagnetic problems

The purpose of this paper is to propose some a posteriori residual error estimators (REEs)to evaluate the accuracy of the finite element method for quasi-static electromagnetic…

Influence of simplifications of the rotational magnetization model on calculation accuracy

The purpose of this paper is to present the differences in results of numerical calculations arising from different simplifications of the rotational magnetization model in…

Sensorless control of PMSM for low speed range

The purpose of this paper is to develop the Permanent Magnet Synchronous Motors drive which has possibility to work in sensorless mode at low speed based on back EMFs estimation…

The analysis of stray losses in tape wound concentrated windings of the permanent magnet synchronous motor

– The purpose of this paper is to analyse the stray losses in the windings of permanent magnet synchronous machines (PMSM).

Representation of magnetic hysteresis in a circuit model of a single-phase transformer

The paper presents a mathematical model for the hysteresis phenomenon in a multi-winding single-phase core type transformer. The set of loop differential equations was developed…

Adaptive neuro-fuzzy PID controller for nonlinear drive system

Various control structures and approaches are in use nowadays. Development of new ideas allows to obtain better quality in control of different industrial processes and hence…

Analysis of electric circuits with semiconductor converters with the use of a small parameter method in frequency domain

Analytical determination of harmonic components of current in electric circuits containing semiconductor converters with the use of a small parameter method (SPM) in frequency…

Analysis of non-linear inverter circuitry of LCTLC topologie

Many electric circuits feature some type of non-linearity of their used devices. Non-linear resistors or inductors could be typical examples. Also, all semiconductor devices are…

The influence of the leg cutting on the core losses in the amorphous modular transformers

In a modular transformer with a wounded amorphous core, the authors should make some cutting to limit the eddy currents in its magnetic ribbon. The purpose of this paper is to…

Progressive inductor modeling via a finite element subproblem method

– The purpose of this paper is to develop a subproblem method (SPM) for progressive modeling of inductors, with model refinements of both source conductors and magnetic cores.

Adaptive and robust controls for static excitation systems

Oscillations and related stability problems of synchronous generators are harmful and can lead to power outage. Studies have shown that currently available commercial applications…

Optimization of the rotor geometry of the line-start permanent magnet synchronous motor by the use of particle swarm optimization

The purpose of this paper is to elaborate the methodology and software for the optimization of rotor structure of the line-start permanent magnet synchronous motor (LSPMSM). To…

Damages to magnetic slot wedges in induction machines

Magnetic slot wedges are usually installed in open slot high-voltage induction machines. They reduce the no load losses and the magnetization current. Additionally, the leakage…

A hardware implementation of intelligent ECG classifier

The purpose of this paper is to design an intelligent ECG classifier using programmable IC technologies to implement many functional blocks of signal acquisition and processing in…

Analytical optimization of litz-wire windings independent of porosity factor

The purpose of this paper is threefold. First, an analytical model based on one-dimensional Dowell’s equation for computing ac-to-dc winding resistance ratio FR of litz wire is…

Model calibration of non-ideal lowpass filter in modulated wideband converter for compressive sampling

The purpose of this paper is to present a model calibration technique for modulated wideband converter (MWC) with non-ideal lowpass filter. Without making any change to the system…

Convergence analysis of Bessel beamformer and its comparison with LMS in adaptive array system

The purpose of this paper is to analyze the convergence performance of Bessel beamformer, based on the design steps of least mean square (LMS) algorithm, can be named as Bessel…

Robust correntropy ICA based blind channel estimation for MIMO-OFDM systems

The purpose of this paper is to propose a robust correntropy assisted blind channel estimator for multiple-input multiple-output orthogonal frequency-division multiplexing…

An accurate and fast reliability analysis method for combinational circuits

One of the main issues which microelectronics industry encounter is reliability as feature sizes scale down to nano-design level. The purpose of this paper is to provide a…

An improved criterion for peak-to-peak realization of direct-form interfered digital filters employing saturation nonlinearities

– The purpose of this paper is to present a criterion for global asymptotic stability of state-space direct-form digital filters employing saturation arithmetic.

Modelling and computation of nonlinear magnetic and electric circuits