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5 results on '"Tadjer S"'

1. An Analytical Approach for Evaluating Turn-On Switching Losses in SiC MOSFET With Kelvin Pin: Concept and Implementation

Author

Mohammed Cherif, O., Nadji, B., Tadjer, S. A., and Bencherif, H.

Abstract

With the progressive adoption of silicon carbide (SiC) power devices in modern power converters, exploiting their superior efficiency, faster switching speed, and higher power density, an understanding of the factors influencing these properties becomes vital. One such critical factor is switching losses, which can drastically affect overall system performance. This study develops and presents a new analytical model for predicting the turn-on switching losses in SiC MOSFETs with Kelvin pin. The proposed model, derived from a carefully constructed set of nonlinear differential equations, accounts for the nonlinearity of the transconductance by incorporating a novel transfer characteristic model. The model also incorporates the nonlinear junction capacitances effects. The developed analytical model allows for the prediction and optimization of turn-on switching losses in SiC MOSFETs, thus enabling improved energy efficiency and reliability. The accuracy of the proposed model is verified through comparison with experimental results obtained using the double pulse test board that was designed and constructed, demonstrating its applicability for the investigation of SiC MOSFET power losses.

Published
2024
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2. APF Applied on PV Conversion Chain Network Using FLC

Author

Bourourou Fares, Tadjer Sid Ahmed, and Habi Idir

Subjects
APF, PV, FLC, renewable energy, power quality, Engineering machinery, tools, and implements, TA213-215
Abstract

This paper focuses on regulation of the parallel active power filter (APF) Dc Voltage bus by judicious choice of rule bases and intervals for each selected fuzzy variable of suitable fuzzy logic controller. In addition, an algorithm describes the main steps for designing an FLC that has any number of rules with direct application to the APF capacitor voltage regulation. Where their simulation, by MATLAB, applied to PV conversion chain network will be represented in the booths cases, constant and variable non-linear loads after modeling, to show the effectiveness of this kind of regulators on electrical power quality and improve the reliability of the APF on PV system. The delivered voltage of PV plant has been regulated and controlled with MPPT using P&O technique and FLC regulator after modeling of each part of the conversion chain. PV plant supplies a nonlinear load from the rectifier installed on the output of the conversion chain via a controlled power inverter. A 3 × 3 rules fuzzy regulator is implanted in the control part of the APF to examine the influence of the FLC on the produced electrical power quality. Simulation results are represented and analyzed.

Published
2023
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3. Le quintette de la première heure ou les filières de soins des pathologies urgentes les plus fréquentes

Author

Claessens, Benoît, Jacques, Jamart J.M., Polikipis, M., Coenen, F., Tadjer, S., Baillon, Renaud, Stevens, Etienne, Vandenbossche, Jean Luc, Gazagne, M.D., Dechamps, Philippe, Mols, Pierre, Claessens, Benoît, Jacques, Jamart J.M., Polikipis, M., Coenen, F., Tadjer, S., Baillon, Renaud, Stevens, Etienne, Vandenbossche, Jean Luc, Gazagne, M.D., Dechamps, Philippe, and Mols, Pierre

Abstract

The European Community has named five emergencies as being priorities. These five emergencies are :the cardiorespiratory arrest, the myocardial infarction, the severe polytrauma, the cerebral vascular accident and the severe acute dyspnoea. In this article three of them are discussed. Seen with the eyes of a generalist the severe polytrauma requires simple gestures, such as an early call for help by the SMUR, axialisation of head, trunk and members, compression of overtly sources of bleeding and opening the airway to facilitate breathing. The acute myocardial infarction continues to pose problems of diagnosis. The pathognomonic presentations are the STEMI and the N-STEMI infarction. In these cases it is a priority to call for the help of a SMUR unit. In the case of a STEMI infarction it is an absolute priority to admit the patient quickly to hospital and to directly move on to the coronarography ward for a primary angioplasty procedure. Within the first three hours of the infarction, if primary angioplasty is not a possibility within the first 90 minutes, thrombolysis is absolutely indicated. In the case of N-STEMI infarction a quick admission to a coronary care unit is urgent but the treatment is mainly medical. The cerebral vascular incident occurs more frequently than the myocardial infarction, but, culturally, not enough importance is attached to this pathology. Within the first three hours the aim is to get the patient to an emergency department (by means of the SMUR), to evaluate the coagulation values of the patient and to perform a head scan (without the injection of contrast) of good quality. If the patient is not too severely incapacitated (NIH score between 4 and 25), if the head scan does not show a hemorrhagic lesion and if there is no contraindication for thrombolysis, Actilyse® should be administered. The time it takes to do all of these acts can not exceed the above mentioned three hours., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2007

5. Forme sensitive pure du syndrome de Guillain-Barré

Author

Tadjer, S., Moerman, Carine, Hourez, Raphaël, Dachy, Bernard, Telerman Toppet, Nicole, Sekhara, Tayeb, Tadjer, S., Moerman, Carine, Hourez, Raphaël, Dachy, Bernard, Telerman Toppet, Nicole, and Sekhara, Tayeb

Abstract

info:eu-repo/semantics/published

Published
2002

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