COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 30 Issue 3

Finite element analysis of transient electromagnetic‐thermal phenomena in a squirrel cage motor

The purpose of this paper is to elaborate the method and algorithm for the analysis of electromagnetic and thermal transients in a squirrel cage induction motor.

Step response optimization method of switched reluctance motor

The purpose of this paper is to present a method of modeling the variable reluctance stepper motor using the time‐stepping finite element technique. The proposed model is used to…

Sliding mode control of a permanent magnet direct drive under non‐linear friction

The purpose of this paper is to find a simple structure of motion controller for permanent magnet direct drive. Application of sliding mode controller theory and equivalent…

Modification of Park variable transformation for wye‐connected winding without neutral wire

The purpose of this paper is to present a modification of the Park variable transformation for a three‐phase wye‐connected winding without neutral wire. A new physical…

Influence and evaluation of non‐ideal manufacturing process on the cogging torque of a permanent magnet excited synchronous machine

The purpose of this paper is to describe how a minimisation of cogging torque is performed with respect to the non‐ideal manufacturing process, aiming at a robust design of the…

Computational cost‐effective modelling of non‐linear characteristics in permanent magnet synchronous motors

In the optimisation of electrical drives, the required degree of detail in the simulation increases constantly. Especially, the industrial demand on multi‐objective optimisation…

Additional cogging torque components due to asymmetry in stator back iron of PM synchronous motors

The purpose of this paper is to present the dependence of the level and harmonic structure of the cogging torque in permanent magnet synchronous motors (PMSM) to interlocks and…

Interactive visualization of transient 3D electromagnetic and n‐dimensional parameter spaces in virtual reality

Nowadays many parameter studies for the design and optimization of electromagnetic devices are carried out by means of 2D and 3D nonlinear finite element (FE) models. Through…

Accounting for saturation in conformal mapping modeling of a permanent magnet synchronous machine

In the electromagnetic field simulation of modern servo drives, the computation of higher time and space harmonics is essential to consider appearing torque pulsations, radial…

Field‐circuit simulation of the dynamics of the outer rotor permanent magnet brushless DC motor

The purpose of this paper is to elaborate a mathematical model of dynamic operation of the permanent magnet brushless DC (BLDC) motor with outer rotor and investigate the…

Computer analysis of high‐speed PM BLDC motor properties

The purpose of this paper is to elaborate a method of computer analysis of high‐speed motor with specific parameters and verifying the obtained results, i.e. computer models by…

Modelling of rotational magnetization in anisotropic sheets

The aim of this paper is to present a new relatively simple model of the rotational magnetization process in anisotropic sheets.

Performance analysis of the sliding‐mode speed observer with magnetizing reactance estimation for the sensorless induction motor drive

The purpose of this paper is to obtain an accurate and robust estimation method of the rotor flux and speed for the sensorless induction motor (IM) drive with magnetizing…

Robust control of PMSM system using the structure of MFC

The purpose of the paper is to find a speed control structure with two degrees of freedom robust against drive parameters variations. Application of structure model following…

Calculation of copper losses in resistance spot welding transformer with space‐ and time‐dependent current density distribution, FEM and measurements

So far the proposed analytical methods for calculation of copper losses are rather simplified and do not include the time component in the basic partial differential equations…

Decoupling and adjustment of forces in an electromagnetic guiding system with six degrees of freedom

The purpose of this paper is to describe the derivation of an adjustment directive for the non‐linear and coupled forces of a high‐comfort elevator guiding system based on…

Determination of flux density produced by multilevel inverters in CM voltage filter

The purpose of this paper is to evaluate the conditions in which a saturation of the common mode (CM) choke might appear to be essential for proper design of the CM voltage…

Rotor surface losses in an I‐converter‐fed synchronous generator considering saturation

Operation of synchronous machines in the power range of several 10 MW with variable speed up to 7,000 rpm using a current converter is, thanks to the development of power…

Transport properties and current flow patterns in homogeneous strongly anisotropic materials

The purpose of this paper is to investigate and explain the unexpected current flow patterns and twisting equipotential surfaces observed in strongly anisotropic materials.

Optimisation of a tubular linear machine with permanent magnets for wave energy extraction

The purpose of this paper is to optimise the cost‐based performance of a tubular linear generator and to minimise cogging forces.

A new DTC control for PMSM with torque ripple minimization and constant switching frequency

The aim of the paper is to conduct an analytical study of the two new methods of the permanent magnet synchronous motor torque and flux direct control with the predictive…

Modelling eddy‐current in laminated non‐linear magnetic circuits

The purpose of this paper is to implement and test a 1D eddy‐current model for laminated iron core of electrical machines and investigate the possibility of incorporating it in a…

Adaptive stabilization for generator excitation system

The purpose of this paper is to develop a controller for damping of oscillations of a synchronous generator connected to the electric network. The goal is to determine the…

Improved accuracy of electro‐quasistatic simulations of large‐scale 3D high voltage insulators with nonlinear material layers

The purpose of this paper is to analyze the accuracy of finite element method simulations for high voltage equipment featuring resistive field grading.

Spectral inductance of the linear motor‐space harmonic analysis

The aim of the paper is to present the methodology of obtaining an approximate equivalent circuit composed of lumped parameters which describes an electromagnetic state of…

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