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Nayli A.,University of Tunis | Guizani S.,University of El Manar | Ammar F.B.,University of Carthage
2015 4th International Conference on Systems and Control, ICSC 2015 | Year: 2015

This study proposes a comparative analysis between the performances of the star windings and open-end stator windings of the synchronous machines with wound rotor without damper windings. The advantages of the openend stator windings at the level of the THD voltage and the torque undulation are presented. It is shown that the novel dual open-end stator windings synchronous machine has significant benefit at the level of the power segmentation is shown. © 2015 IEEE. Source


Nayli A.,University of Tunis | Nayli A.,University of Carthage | Guizani S.,University of El Manar | Guizani S.,University of Carthage | Ammar F.B.,University of Carthage
Journal of Electrical Systems | Year: 2015

In this paper, the authors propose the implantation of the scalar control for controlling the open-end winding induction machine on FPGA. The scalar control is simulated in matlab Simulink environment using a Xilinx System Generator. This control is implemented in a Xilinx Spartan 3E FPGA board. It is experimentally verified by the visualization of command signals for the switches of the inverters. © JES 2015. Source


Guizani S.,University of El Manar | Nayli A.,University of Tunis | Ben Ammar F.,University of Carthage
Journal of Electrical Engineering | Year: 2014

In this paper the authors propose the degraded mode operation of the open-end stator winding induction machine supplied by two converters on three levels. Each converter is constituted by two three-phase inverters in cascaded. The different conditions that must be respected for the operation mode will be presented. Source


Ben Saad L.,University of El Manar | Tourancheau B.,Joseph Fourier University
2015 7th International Conference on New Technologies, Mobility and Security - Proceedings of NTMS 2015 Conference and Workshops | Year: 2015

Sensor-Cloud is an emerging technology and popular paradigm of choice in systems development for various real-life applications. It consists in integrating wireless sensor networks with cloud computing environment. In fact, the cloud provides new opportunities of massive data storage, processing and analysing that wireless sensor networks can not offer. Despite the fact that the cloud have helped to overcome many wireless sensor networks limitations, there are other challenging issues that need to be addressed. The major problem that can significantly affect Sensor-Cloud performance is the short lifetime due to limited energy supply of sensors and sometimes some sinks. In this work, we propose a Sensor-Cloud Optimization problem (SCL-OPT) that maximizes lifetime as well as increases energy efficiency of sensors and sinks layers. © 2015 IEEE. Source


Barg S.,University of El Manar | Bennani A.B.A.,University of Carthage
International Multi-Conference on Systems, Signals and Devices, SSD'11 - Summary Proceedings | Year: 2011

This paper deals with the use of coupled inductors for the DC|DC converters. A complete analysis of this topology is carried out and its advantages are demonstrated by comparing it to the DC/DC converter with uncoupled inductor. In this paper, we show how the coupled inductors allow the I 2R losses reduction and the minimization of the phase and the output current ripples. Different architectures and designs of coupled inductors are given. The benefits and the drawbacks of each one are analyzed basing on three criteria: minimization of the harmonic currents, ability to filter the differential currents and the converter volume-weight. Then, simulation results of a medium power DC drive using a coupled inductor converter are given and discussed emphasizing the theoretical results and showing the advantages of the studied topology for this power range. © 2011 IEEE. Source

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