COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 29 Issue 4

Inducted currents analysis in multiply connected conductors using reluctance‐resistance networks

The purpose of this paper is to develop a reluctance‐resistance network (RRN) formulation for determining the induced current distributions in a 3D space of multiply connected…

Simulation of skin effect via separated representations

The purpose of this paper is to apply the method of separation of variables to obtain the current distribution in the slot of an electrical machine, taking into account the skin…

Computation of lightning electromagnetic field in the presence of a tall tower with the HYBRID method

The purpose of this paper is to propose a numerical method in time domain in order to solve the electric and magnetic fields radiated from lightning in the presence of the tall…

Parallel direct solver for the finite integration technique in electromagnetics

The purpose of this paper is to develop a solving method based on the parallelization of the calculus of the finite integration technique on many processors and discuss its…

Magnetic microfibres modelling methods

The purpose of this paper is to describe research into the problem of creating computer structural models of magnetic microfibres. The main goal of the research is to create the…

Non linear finite element‐circuit model of a hybrid stepping motor

The purpose of this paper is to present a coupled finite element (FE) – reluctance network model for a hybrid step motor.

Specific power as objective function in GA optimal design of permanent magnet disc motor

The application of the analysed permanent magnet disc motor (PMDM) is in electric vehicle and therefore there are several objectives that could be tackled in the design procedure…

Computer modelling of 3D transient thermal field coupled with electromagnetic field in three‐phase induction motor on load

The purpose of this paper is to present the plan to develop the known algorithm for thermal and electromagnetic coupled problem calculation. This is used for three‐phase induction…

3D analytical field calculation using triangular magnet segments applied to a skewed linear permanent magnet actuator

The purpose of this paper is to present novel analytical expressions which describe the 3D magnetic field of arbitrarily magnetized triangular‐shaped charged surfaces. These…

Proposal of electromagnetic spherical actuator with 3‐DOF

The purpose of this paper is to propose a new electromagnetic spherical actuator with three‐degree‐of‐freedom. Multi‐degree‐of‐freedom actuators which can be operated in arbitrary…

Induction thermoelastic actuator with controllable operation regime

The purpose of this paper is to present a new device (thermoelastic actuator) for accurate control of position whose principle is based on thermal dilatation of its working unit…

Computer modelling of magnetotherapy in orthopedic treatments

The paper aims to clarify the method/methodology of establishing a computer model of the electromagnetic therapy connected with some knee joint problems. Two cases are considered…

Source identification based on regularization and evolutionary computing in biomagnetism

The purpose of this paper is to develop a source reconstruction technique, applied to a case study in biomagnetism, using both evolutionary optimization and regularization…

Simplified models including eddy currents for laminated structures

The purpose of this paper is to present a comparative analysis concerning the influence of eddy currents on the distribution of the magnetic flux density in the laminated…

Modelling of impulse loading in high‐temperature superconductors: Assessment of accuracy and performance of computational techniques

The aim of this paper is to access performance of existing computational techniques to model strongly non‐linear field diffusion problems.

Simulation of acoustic radiation of an AC servo drive

Nowadays, the determination of the acoustic radiation of electric machines is of particular interest, because legal regulations restrict the maximum audible noise radiated by…

Inter‐turn short‐circuit effect on induction machine iron losses

The aim of this paper is to estimate the iron losses for an induction machine in the healthy case taking the slotting effect into account and to study the effect of an inter‐turn…

Support vector machines for measuring dielectric properties of materials

The dielectric properties of materials (complex permittivity) can be deduced from the admittance measured at the discontinuity plane of a coaxial open‐ended probe. This implies…

Permanent magnet (de‐) magnetization and soft iron hysteresis effects: A comparison of FE analysis techniques

The purpose of this paper is to promote practical methods for the numerical modelling of hard magnetic materials and soft ferromagnetic materials in an engineering context (design…

Effects of carrier frequency of PWM inverter on electrical loss of interior permanent magnet motor

The purpose of this paper is to clarify the electrical loss of an interior permanent magnet (IPM) motor driven by the pulse‐width modulation (PWM) inverter with various carrier…

Sound optimization of a converter‐fed drive system using an acoustic camera in combination with modal analysis

Modern variable‐speed drive systems using frequency converters generate additional audible noise as a result of the voltages that are no longer sinusoidal. Using suitable…

Vibration analysis of small power transformer

The purpose of this paper is to present a methodology of identification and calculating vibrations of power transformers caused by magnetostriction.

Automated radial vibrations reduction for switched reluctance machines

The purpose of this paper is to suggest a procedure which makes it possible to reduce the radial vibrations of doubly salient switched reluctance motors (SRMs).

Dielectric‐EBG covered conical antenna for UWB applications

The purpose of this paper is to investigate of the ultra‐wide band (UWB) characteristics of a conical antenna covered by an electromagnetic band‐gap (EBG) structure composed of…

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