COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 40 Issue 2

Measurement of the leakage flux in the vicinity of a transformer core: Application to detection and localization of faults

Stéphane Duchesne, Fabrice Morganti, Carl Shulz, Daniel Roger

This study presents a new method for the detection of faults in large transformer cores. It is based on the analysis of leakage flux components in the vicinity of the sheet stack…

A deterministic semi-infinite global optimization method to design slotless permanent magnet machines

Zahia Amrouchi, Frederic Messine, Clement Nadal, Mohand Ouanes

In this work, a method to design a slotless permanent magnet machine (SPMM) based on the joint use of an analytical model and deterministic global optimization algorithms is…

Multi-physics analysis of a novel circular pantograph catenary system for high-speed trains

Song Xiao, Yuanpei Luo, Jingchi Wu, Can Zhang, Yang Rao, Guangning Wu, Jan Sykulski

In high-speed trains, the energy is supplied from a high voltage catenary to the vehicle via a pantograph catenary system (PCS). Carbon pantograph strips must maintain continuous…

Analytical solution of the Duffing equation

Zhivko Georgiev, Ivan Trushev, Todor Todorov, Ivan Uzunov

The purpose of this paper is to find an exact analytical expression for the periodic solutions of the double-hump Duffing equation and an expression for the period of these…

A thermal extension and loss model for Tellinen’s hysteresis model

Jan Kühn, Andreas Bartel, Piotr Putek

The thermally extended Tellinen model (Kühn et al., to appear) is here investigated and equipped with a hysteresis loss model, while preserving its simple structure.

Parameter identification of solar cells and fuel cell using improved social spider algorithm

Hadi Kashefi, Ahmad Sadegheih, Ali Mostafaeipour, Mohammad Mohammadpour Omran

To design, control and evaluate photovoltaic (PV) systems, an accurate model is required. Accuracy of PV models depends on model parameters. This study aims to use a new algorithm…

Analysis of electrical circuits supplied by sequence of impulses

Zhivko Georgiev, Ivan Trushev

This paper aims to analyze transient and steady state processes in series resistive capacitive-circuits when the supplied voltage is a sequence of periodic rectangular pulses. The…

Impacts of using wide bandgap transistors on electronics and motors

Mathieu Gerber, Guillaume Callerant, Christophe Espanet, Farid Meibody-Tabar, Noureddine Takorabet

The purpose of this paper is to study the high-frequency impacts of fast switching wide-bandgap transistors on electronic and motor designs. The high-frequency power converters…

Adjoint-based topology optimization to reduce the energy consumption of a Hall effect thruster

Rtimi Youness, Frederic Messine

The presented study aims to minimize the energy consumed by a Hall effect thruster (HET) under a constraint which makes it possible to generate a specified magnetic field in a…

Proposal of a radially differential type magnetic-geared motor

Kazuaki Takahara, Katsuhiro Hirata, Noboru Niguchi, Hironori Suzuki, Hajime Ukaji

This paper aims to propose a new magnetic-geared motor (MGM) which can easily increase the gear ratio up to approximately several hundred. The operational principle is described…

An alternative method for field analysis in inhomogeneous domains

Stefano Costa, Eugenio Costamagna

This paper aims to solve inhomogeneous dielectric problems by matching boundary conditions at the interfaces among homogeneous subdomains. The capabilities of Hilbert transform…

Image reconstruction by solving the inverse problem in ultrasonic transmission tomography system

Tomasz Rymarczyk, Konrad Kania, Michał Gołąbek, Jan Sikora, Michał Maj, Przemysław Adamkiewicz

The purpose of this study is to develop a reconstruction and measurement system for data analysis using ultrasonic transmission tomography. The problem of reconstruction from the…

Using scaled FE solutions for an efficient coupled electromagnetic–thermal induction machine model

Martin Marco Nell, Benedikt Groschup, Kay Hameyer

This paper aims to use a scaling approach to scale the solutions of a beforehand-simulated finite element (FE) solution of an induction machine (IM). The scaling procedure is…

On the scientific importance of the multivibrator

Emanuel Gluskin

This paper aims to present some “natural philosophy” that may be associated with multivibrator. The motivation is given by the exposition work (Mathis, 2019) of Wolfgang Mathis.