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159 results on '"Barakat, G."'

3. Hybrid Excited Synchronous Machines

Author

Hlioui, S., primary, Gabsi, M., additional, Ahmed, H. Ben, additional, Barakat, G., additional, Amara, Y., additional, Chabour, F., additional, and Paulides, J. J. H., additional

Published
2022
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8. Permeance network modeling of the stator winding faults in electrical machines

Author

Mahyob, A., Reghem, P., and Barakat, G.

Subjects
Electrical equipment and supplies -- Analysis, Electrical machinery -- Analysis, Network analyzers -- Analysis, LAN monitor, Business, Electronics, Electronics and electrical industries
Abstract

The aim of this paper is to present a robust model based on permeance network method (PNM) for the diagnosis of electrical machine stator faults. The proposed model allows taking into account the local magnetic saturation of the magnetic circuit due to heavy stator fault currents and remains moderately time consuming compared to the finite elements method. Firstly, the system of algebraic equations describing the developed permeance network is written. Then, this magnetic model is coupled to the electrical differential equations describing the induction machine in presence of inter-turn stator faults. Finally, simulation results are successfully compared to the experimental results. The impact of saturation on inter-turn fault signature clearly confirms the interest of a nonlinear model based diagnostic for this fault. Index Terms--Electric machines and drives, modeling, simulation, permeance network, diagnostic.

Published
2009

21. Analysis of the Cogging Torque Behavior of A Two-Phase Axial Flux Permanent Magnet Synchronous Machine

Author

Barakat, G., El-meslouhi, T., and Dakyo, B

Subjects
Finite element method -- Usage, Magnets, Permanent -- Testing, Business, Electronics, Electronics and electrical industries
Abstract

This paper deals with the study of the cogging torque of a small two phases axial flux permanent magnet synchronous machine (AFPMSM). Analytical models of airgap permeance and of magneto-motive force (MMF) are proposed. In order to validate the developed analytical model, the obtained results are compared with that of a three dimensional (3D) finite element method (FEM) simulation of the motor in a special case. The cogging torque due to the permanent magnets (PM) is then estimated based upon the virtual works method. The influence of both magnetization distribution and shape of stator auxiliary poles on the cogging torque is evaluated by means of the developed analytical model. Index Terms--Airgap permeance, axial flux permanent magnet synchronous motor, cogging torque, magnetization distribution.

Published
2001

22. Magnetic Source Optimization for De-Stacking Process of Aluminum Sheets

Author

Malarge, C., Barakat, G., and Dakyo, B.

Subjects
Magnetic separators -- Usage, Electromagnetism -- Models, Business, Electronics, Electronics and electrical industries
Abstract

This paper deals with an electromagnetic device optimization for a new de-stacking process of aluminum sheets. In a first step, we present the principle for generation of the adequate field strength by an electromagnetic separator device. In a second step, we use a simple and efficient method to calculate the three-dimensional (3D) electromagnetic field and we propose a pattern of current density distribution in an aluminum sheet. Finally, this modeling process leads to the calculation of the de-stacking strength and in so doing to the optimum design for an electromagnetic separator device. Index Terms--Electromagnet design, electromagnetic force calculation, magnetic separation, permanent magnet.

Published
2001

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