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University of Technology of Compiègne, France

Hamada S.,University of Batna | Louai F.Z.,University of Batna | Nait-Said N.,University of Batna | Benabou A.,L2EP
Journal of Magnetism and Magnetic Materials | Year: 2016

An improved dynamic hysteresis model is proposed for the prediction of hysteresis loop of electrical steel up to mean frequencies, taking into account the skin effect. In previous works, the analytical solution of the diffusion equation for low frequency (DELF) was coupled with the inverse static Jiles-Atherton (JA) model in order to represent the hysteresis behavior for a lamination. In the present paper, this approach is improved to ensure the reproducibility of measured hysteresis loops at mean frequency. The results of simulation are compared with the experimental ones. The selected results for frequencies 50 Hz, 100 Hz, 200 Hz and 400 Hz are presented and discussed. © 2016 Elsevier B.V. All rights reserved. Source

Vidrih Z.,University of Swansea | Vezzoli E.,L2EP
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

Electrovibration technique can modify user’s perception of a surface through the modulation of the sliding friction accordingly to the voltage applied. This paper is introducing a novel approach to virtual haptic rendering in electrovibration based haptic displays in order to provide realistic feeling of a simulated surface, where the required voltage signal is obtained using a simplified equation. The approach was validated by the use of a finite element computational framework able to simulate tactile scenarios on real and virtual surfaces. A database of precompiled tactile scenarios was generated to predict outputs for custom parametric surfaces through a conditional average estimator method. In addition, an experimental database obtained by active exploration of different surfaces, is utilised for texture rendering. A web application, comprising the algorithms described in the paper, has also been developed, and is freely available to use at http://www.haptictexture.com. © Springer International Publishing Switzerland 2016. Source

Dieulot J.-Y.,French National Center for Scientific Research | Colas F.,L2EP | Chalal L.,Ecole Centrale Lille | Dauphin-Tanguy G.,Ecole Centrale Lille
Electric Power Systems Research | Year: 2015

This work deals with the development of an economic supervisory predictive control method for the management of a hybrid renewable energy system. The hybrid cell integrates solar panels, a gas microturbine and a storage unit. Tuning the predictive controller is easy: the optimal criterion encompasses the environmental, fuel, energy delivery and storage costs. Short time predictions of the solar power are embedded in the supervisor which yields smoother battery control and better power management. Real-time experiments are driven in a Hardware-in-the-Loop framework illustrating the relevance of the proposed supervisory predictive control design. © 2015 Elsevier B.V. All rights reserved. Source

Da Luz M.V.F.,Federal University of Santa Catarina | Leite J.V.,Federal University of Parana | Benabou A.,L2EP | Sadowski N.,Federal University of Santa Catarina
IEEE Transactions on Magnetics | Year: 2010

This paper presents a 2-D finite-element model to analyze the iron losses in a three-phase transformer. In this model, the effects of nonlinear core behavior are taken into account by means of a vector hysteresis model incorporated in the finite-element formulation by using a magnetic differential reluctivity tensor. The reluctivity tensor emerges naturally from the vectorized JilesAtherton model. The complete model includes eddy current losses and the anomalous losses. The magnetization currents are calculated and compared with the measured ones. Calculations of hysteresis loops at spotted points of the transformer are also performed. The comparisons between the iron losses measured and calculated with vectorial hysteresis, including the eddy current and the anomalous losses, are presented. © 2006 IEEE. Source

Leite J.V.,Federal University of Parana | Benabou A.,L2EP | Sadowski N.,GRUCAD EEL UFSC
IEEE Transactions on Magnetics | Year: 2010

Inrush currents have undesired effects on transformers when these ones are, for example, switched into service. Theses effects have to be taken into account when designing a transformer, what leads to a constraint on its magnetic core and size definition. This paper investigates the modeling of inrush currents in a three phase transformer under sinusoidal voltage operation conditions. The transformer core is modeled taking into account the magnetic hysteresis including the anisotropy. Therefore, a Jiles-Atherton vectorized model is used for the nonlinear core modeling. The key advantage of this vector model is its reluctivity tensor which is appropriated for the Finite Element calculations in vector potential formulation. A time-domain simulation was carried out and the results were compared with experimental data for the procedure validation. © 2006 IEEE. Source

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