COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 28 Issue 3

Symmetrization of asymmetrical nonlinear three‐phase load supplied from non‐ideal sinusoidal voltage source

The purpose of this paper is to deal with the problem of symmetrization of asymmetrical three‐phase delta connected nonlinear load. In the model of the three‐phase sinusoidal…

Modeling non‐linear passive direct methanol fuel cells

The purpose of this paper is to simulate micro direct methanol fuel cells (DMFCs) for portable electronic devices by means of a non‐linear equivalent circuit based on a fully…

Broken rotor bar impact on sensorless control of induction machine

The purpose of this paper is analysis of the sensorless control system of induction machine with broken rotor for diagnostic purposes. Increasing popularity of sensorless…

Application of MLP and RBF neural networks in the control structure of the drive system with elastic joint

The purpose of this paper is to obtain an estimation of not measured mechanical state variables of the drive system with elastic coupling between the driven motor and a load…

Rotor‐design and on‐line starting‐performance analysis of a synchronous‐reluctance motor

The purpose of this paper is to derive the geometry‐based equations for inductances which are used in circuit theory analysis of synchronous reluctance motor (SRM). Transient and…

Amorphous modular transformers and their 3D magnetic fields calculation with FEM

The purpose of this paper is to examine the calculation of magnetic field distribution in the modular amorphous transformers under short‐circuit state including the flux by the…

Numerical modeling of 3‐D comb drive electrostatic accelerometers structure (method of levitation force reduction)

The purpose of this paper is to discuss the numerical modelling of 3D structure of micro‐electro‐mechanical systems (MEMS) accelerometers. The general idea being discussed is the…

Modelling dynamic hysteresis loops in steel sheets

The aim of the paper is to present a simple approach to modelling minor hysteresis loops in grain‐oriented steel sheets under quasi‐static and dynamic conditions. The hysteresis…

Voltage security constrained minimization of power losses in an electric power system

The purpose of this paper is to present an improved approach to reactive power planning in electric power systems (EPS). It is based on minimization of a transmission network's…

Steady and transient states modelling methods of matrix‐reactance frequency converter with buck‐boost topology

The purpose of this paper is to introduce methods for calculating steady‐state and transient processes in a symmetrical three‐phase matrix‐reactance frequency converter (MRFC)…

Numerical modelling of non‐linear coupled thermo‐electric problems: A comparative study

The purpose of this paper is to access performance of existing computational techniques to model strongly non‐linear coupled thermo‐electric problems.

Scattering by a two‐dimensional doped photonic crystal presenting an optical Kerr effect

The purpose of this paper is to discuss two‐dimensional electromagnetic diffraction by a finite set of parallel nonlinear rods (optical Kerr effect). To point out the versatility…

TESTCASE: a benchmark problem for coupled field‐circuit simulations

The purpose of this paper is to present an experimental setup for the verification of coupled electromagnetic field‐circuit simulation, called TESTCASE. By means of simple and…

Phenomena of additional cogging torque components influenced by stator lamination stacking methods in PM motors

The purpose of this paper is to estimate and evaluate how cogging torque in permanent magnet (PM) motor designs is sensitive to the number of applied interlocks in stator…

Loop analysis of multi‐branch, multi‐node non‐linear circuits using singular formulation

The purpose of this paper is to find effective methods of loop analysis of multi‐branch and multi‐node non‐linear circuits using a singular formulation.

Comparison of a simple and a detailed model of magnetic hysteresis with measurements on electrical steel

For efficient magnetic field calculations in electrical machines, the hysteresis and losses in laminated electrical steel must be modeled in a simple and reliable way. The purpose…

The influence of magnetic hysteresis on magnetorheological fluid clutch operation

The purpose of this paper is to elaborate upon the mathematical model of coupled electromagnetic, fluid dynamic and motion phenomena that will allow for investigation of the…

Modelling of a car starter with permanent magnet commutator motor

The purpose of this paper is to present a developed modelling method of a car starter with permanent magnet commutator motor.

Spectral‐element method for high‐speed rotating cylinders

The purpose of this paper is to offer a fast and reliable discretisation scheme for computing the electromagnetic fields inside a ferromagnetic cylinder, accounting for motional…

Accurate minor loops calculation with a modified Jiles‐Atherton hysteresis model

Although the original Jiles‐Atherton (J‐A) hysteresis model is able to represent a wide range of major hysteresis loops, in particular those of soft magnetic materials, it can…

Analysis of the force ripples of a current loaded PMLSM

The purpose of this paper is to present an analysis of the force ripples of an open slot permanent magnet linear synchronous motor (PMLSM). A calculation procedure using 2D finite…

Electromagnetic modelling of short circuited coreplates

Coreplates in large generators may suffer from local short circuits. An accurate analysis is required to avoid these failures and detect them when occurring. The purpose of this…

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