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Дисертації з теми "Courants d'induit"
Benmessaoud, Youcef. "Circuit équivalent magnétique non-linéaire adaptatif : 2-D et 3-D avec prise en compte des courants induits." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD064.
Повний текст джерелаIn the face of climate change, the automotive industry has aroused particular interest in reducing CO2 emissions.The electrification of vehicles seems to be an essential solution to meet European standards and standardizations. New technological challenges are imposed and spread across the entire electric drive chain, from the battery to the electric motor. In this context, Agence de l’Environnement et la Maitrise de l’Energie is setting a colossal budget to encourage energy transition. In this context, the Conception Optimal des Chaines de traction Electrique project was handled, and whose main coordinator is RENAULT. The thesis fits into the first axis of the project, which aims to model the electric motor component.The main objective of the thesis is two-dimensional and three-dimensional semi-analytical modeling taking into account to eddy-current while the electromagnetic analysis of the electric machine. 2-D and 3-D models based on the method of magnetic equivalent circuits have been developed. Subsequently coupled to ananalytical model allowing the estimation of eddy-current losses within the massive conductive parts. This model would be of assistance during thermal analyzes of static or dynamic electromagnetic devices
Boulkroun, Khaled. "Contribution à la caractérisation des diodes Schottky oxydées : application au phosphure d'indium." Nancy 1, 1996. http://www.theses.fr/1996NAN10339.
Повний текст джерелаRouvié, Anne. "Photodiodes à avalanche GaInAs/Al(Ga)InAs pour la détection à 1,55µm : applications aux télécommunications optiques et à la détection en espace libre." Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10011.
Повний текст джерелаThis thesis presents the study of SAGM avalanche photodiodes, with a thin Al(Ga)InAs avalanche layer and a GaInAs absorption layer, grown on InP substrate. These APDs target two applications : optical telecommunications for 10Gb/s metro/access networks and free space detection for LIDAR profilometry. First, the ionization coefficients measurements on several Aluminium compound materials lead us to choose AlInAs as avalanche material because of its high ionization coefficients ratio. Then dark current measurements and simulations allow us on one hand, to find its origin and to reduce its level, and on the other hand, to make out a photodiode model (dark current, multiplication factor and bandwidth) which was validated through the study of various APD vertical structures and diode geometries. Finally, the APDs characterization simultaneously demonstrates a low multiplied dark current Id,M = 2nA, a high responsivity R0(M = 1) = 0,9A.W-1 at 1,55µm, a low excess noise factor f(M = 10) = 3,5 and a high gain×bandwidth product G × B = 150GHz, which put our components at the best state of the art level. System measurements such as bit error rate or sensitivity carried out on photoreceivers using our diodes validate the improvement brought by these APDs compared to competitors. Moreover, the early free space sensitivity measurements confirm the interest showed to this kind of photodiodes
Ait, Saada Aomar. "Caractérisation d'un plasma RF : Influence des paramètres du plasma sur les dépôts de passivation du phosphure d'indium (INP)." Nancy 1, 1987. http://www.theses.fr/1987NAN10037.
Повний текст джерелаDurnez, Clémentine. "Analyse des fluctuations discrètes du courant d’obscurité dans les imageurs à semi-conducteurs à base de silicium et Antimoniure d’Indium." Thesis, Toulouse, ISAE, 2017. http://www.theses.fr/2017ESAE0030/document.
Повний текст джерелаImaging has always been an interesting field, all the more so as it is nowpossible to see further than human eyes in the infrared and ultraviolet spectra. For each fieldof application, materials are more or less adapted : in order to capture visible light, Siliconis a good candidate, because it has been widely studied, and is also used in our everydaylife. Concerning the infrared, more particularly the MWIR spectral band, InSb has provedto be stable and reliable, even if it need to operate at cryogenic temperatures because ofa narrow bandgap.. In this work, a parasitic signal called Random Telegraph Signal (RTS)which appears in both materials (and also others, such as HgCdTe or InGaAs) is analyzed.This signal comes from the pixel photodiiode and corresponds to a discrete dark currentfluctuation with time, like blinking signals. This can cause detector calibration troubles, orfalse star detection for example. This study aims at characterizing RTS and localize the exactorigin in the photodiode in order to be able to predict or mitigate the phenomenon