Dissertations / Theses on the topic 'Segmentation des aimants permanents'
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Bettayeb, Adel Azzedine. "Pertes à haute fréquence dans les rotors des machines synchrones à aimants alimentées par onduleur de tension." Phd thesis, Supélec, 2010. http://tel.archives-ouvertes.fr/tel-00805589.
Full textLateb, Ramdane. "Modélisation des machines asynchones et synchrones à aimants avec prise en compte des harmoniques d'espace et de temps : application à la propulsion marine par POD." Thesis, Vandoeuvre-les-Nancy, INPL, 2006. http://www.theses.fr/2006INPL055N/document.
Full textThis work concerns the modeling and the design of the permanent magnets and asynchronous motors intended for POD ship propulsion. A state of the art is presented, where various topologies of motors designed for this application are approached there. The permanent magnet motor and the induction motor have been chosen for the application. For the permanent magnets motor, a finite element analysis is adopted to design and minimize the main harmonics leading to a quasi sinusoidal back EMF. A finite element model coupled to an electrical circuit allows to predict both current and torque waveforms including time harmonics knowing the voltage waveform of the inverter. The induction motor is designed in such a way to have minimum losses and pulsating torque. For this purpose, a 2D complex finite element method coupled to an electrical circuit is developed. In addition, another 2D finite element-electrical circuit model is proposed to evaluate time harmonics losses and to reconstitute the current and torque waveforms. This model allows to predict the pulsating torques. The validation and verification step is done by using a time stepping finite element software Flux2D and some available measurements (for the permanent magnets motor). The comparison of the calculations obtained by the different methods and software, as well as the available measurements is satisfactory
Lateb, Ramdane. "Modélisation des machines asynchrones et synchrones a aimants avec prise en compte des harmoniques d'espace et de temps : application à la propulsion marine par POD." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2006. http://tel.archives-ouvertes.fr/tel-00138509.
Full textpermanents et asynchrones destinés à la propulsion marine par POD. Un état de l'art est
présenté, où les différentes topologies de moteurs pour ce type d'application y sont abordées. La
Machine à aimants permanents et la machine asynchrone on été retenue pour notre application.
Dans le cas de la machine à aimants permanents, une analyse par éléments finis est
effectuée pour dimensionner la machine à aimants permanents et minimiser les principaux
harmoniques de la FÉM. Un modèle éléments finis 2D en magnétostatique couplé à un modèle
circuit est développé pour la prédiction des couples pulsatoires dues aux harmoniques du
convertisseur.
En ce qui concerne la machine asynchrone, Pour tenir compte des harmoniques d'espace
et évaluer leurs pertes, un modèle électromagnétique utilisant la résolution par éléments finis 2D
en magnétodynamique couplé à un modèle circuit est développé. Par ailleurs, un autre modèle
basé sur le principe de couplage éléments finis- circuit électrique est développé pour tenir compte
des harmoniques de temps du variateur, ce modèle permet d'évaluer à la fois les pertes dues aux
harmoniques de temps, mais aussi des couples pulsatoires.
Dans la phase de validation et vérification des différents calculs, nous avons utilisé l'outil
Flux2D de calcul par éléments finis qui tient compte de la rotation du rotor (pas à pas dans le
temps) et effectué certaines mesures (cas de la machine à aimants permanents). Les résultats des
calculs obtenus par les modèles développés concordent avec ceux obtenus par la méthode
temporelle (pas à pas dans le temps) et les quelques mesures dont nous disposons.
Berriaud, Christophe. "Moteur supraconducteur à aimants permanents." Grenoble 1, 1992. http://www.theses.fr/1992GRE10090.
Full textChillet, Christian. "Machine synchrone multidisque à aimants permanents." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376127407.
Full textSimon, Fabrice. "Moteur couplé supraconducteur à aimants permanents." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0149.
Full textChillet, Christian. "Machine synchrone multidisque à aimants permanents." Grenoble INPG, 1988. http://www.theses.fr/1988INPG0125.
Full textLétourneau, Jean-François. "Méthode de dimensionnement d'alternateur à aimants permanents." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61354.pdf.
Full textHugon, Cédric. "Aimants permanents pour la RMN et l'IRM." Versailles-St Quentin en Yvelines, 2010. http://www.theses.fr/2010VERS0044.
Full textPermanent magnets are a good alternative to superconducting magnets for NMR applications demanding a smaller magnetic field strength. This work focuses on the theoretical and experimental study of permanent magnet systems with controlled field profiles, suitable for NMR. After introducing a formalism based on spherical harmonics decomposition for the design of such magnets, we extended these concepts to the characterization (field mapping) and shimming of simulated or fabricated structures. The cases of the generation of a homogeneous field and of a strong field gradient have to be treated separately due to concomitant fields. Consequently, we provided a different framework for both situations. Using these frameworks, we fabricated several prototypes after our designs. We described the performance of a low-cost homogeneous in situ magnet achieving 0. 12~T with 12~ppm homogeneity in a 3~mm3 volume after shimming based on additional magnet pieces. In addition, a single-sided static gradient structure is presented. The shimming of this magnet, based on geometry alteration, demonstrated the possibility to map precisely a very strong field gradient (3 T/m) and to control the spatial variations of that profile. This single sided magnet was then integrated with surface coils of our own design in order to perform ex situ NMR experiments. We demonstrated the ability to perform relaxation time measurements and 1D imaging with a resolution of 15~µm over several millimeters
Benghezal, Karim. "Contribution à l'étude d'actionneurs synchrones à aimants permanents." Grenoble INPG, 1991. http://www.theses.fr/1991INPG0039.
Full textHarmim, Saïd, and Christian Chillet. "Etude analytique de machines synchrones à aimants permanents." Grenoble INPG, 1993. http://www.theses.fr/1993INPG0197.
Full textBommé, Edouard. "Modélisation et optimisation des machines électriques discoïdes à double entrefer." Grenoble INPG, 2009. http://www.theses.fr/2009INPG0155.
Full textThe evolution of technology and environmental problems has encouraged the development of new structures of electrical machines. Ln this thesis, we propose to study two structures: dual gap discoid machines and permanent magnets buried. Using current modelling tools (three-dimensional finite element modelling with FLUX) with new optimization methods (digital design of experiments methods) and ferromagnetic materials rarely used at present (iron powder), a study will be conducted on the industrial potential of each structure. At the end of this research, we propose new efficient machines within the small and medium power range. These machines, combined with proper supply, can be used as variable speed drives in ail sectors of industry
Bloch, Frédéric. "SOURCE DE CHAMP INTENSE 4 Tesla À AIMANTS PERMANENTS." Phd thesis, Grenoble INPG, 1999. http://tel.archives-ouvertes.fr/tel-00763901.
Full textZanini, Luiz. "Bio-Mag-MEMS autonomes basés sur des aimants permanents." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00820317.
Full textYoumssi, André. "Contribution aux calculs des machines synchrones à aimants permanents." Vandoeuvre-les-Nancy, INPL, 1992. http://www.theses.fr/1992INPL036N.
Full textLe, Roux Denis. "Etude cristallographique et magnétique de quelques matériaux pour aimants permanents." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37599172c.
Full textChavanne, Joël. "Contribution à la modélisation des systèmes statiques à aimants permanents." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376126163.
Full textBouzekri, Hacène. "Contribution à la commande des machines synchrones à aimants permanents." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL054N.
Full textChavanne, Joël. "Contribution à la modélisation des systèmes statiques à aimants permanents." Grenoble INPG, 1988. http://www.theses.fr/1988INPG0074.
Full textReama, Abdellatif. "Contribution à l'étude d'un servomoteur à aimants permanents et commutation électronique." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37609231c.
Full textBenabderrahmane, Chamseddine. "Développement d’un onduleur cryogénique à aimants permanents Pr2Fe14B au Synchrotron SOLEIL." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112139.
Full textUndulators are magnetic systems which produce periodic magnetic field. Synchrotron radiation sources called third generation produce high intensity radiation when relativistic particles are accelerated in this magnetic field. The radiation is emitted at shorter wave length for high magnetic field and small period undulators. A first solution consists to integrate the magnetic system in a big vacuum chamber. The subject of the thesis is to improve the magnetic performance of an in vacuum undulator of 30 % by cooling down the magnetic system at cryogenic temperature. Using Pr2Fe14B permanent magnet allows cooling down directly to the liquid nitrogen temperature which simplified the cooling system.IN chapter I the magnetic characteristics of undulators are described, different types of undulators are presented and the state of the art of cryogenic undulator is given. In chapter II permanent magnet samples Pr2Fe14B Nd2Fe14B from different companies are characterised. Two four period prototypes, one with Pr2Fe14B and one with Nd2Fe14B have been assembled and measured to compare with the magnetic system simulation. The magnetic design of a full scale 2 m Pr2Fe14B undulator has been performed. The period of the undulator is optimised and the magnetic forces calculated. In chapter III the mechanical design of the carriage and different mechanical parts is presented. Thermal studies which include the dissipated power from different mechanical parts and from the electrons beam for all filling modes and different positions in SOLEIL storage ring. The cooling system is optimised and the design of the cooled girders is presented. In chapter IV the different magnetic measurements methods are described and the magnetic measurement bench used at SOLEIL presented. The design of magnetic bench installed in the vacuum chamber and dedicated to the magnetic measurement at cryogenic temperature is presented. In chapter V the different steps for the construction of an in-vacuum undulator (magnetic assembly, shimming, magic finger, mechanical assembly of the vacuum chamber, installation and commissioning with the electrons beam) are presented. In chapter VI the different steps of the constructing of a cryogenic undulator, the assembly and the ajustement of cryogenic temperature magnetic bench are described. The magnetic measurements of the undulator at cryogenic and room temperature are compared. The commissioning of the undulator with the electrons beam is presented and the perspectives to improve this cryogenic undulator are proposed
Llibre, Jean-François. "Étude d'une structure de machine synchrone cylindrique vernier à aimants permanents." Toulouse, INPT, 1997. http://www.theses.fr/1997INPT086H.
Full textReama, Abdellatif. "Contribution à l'étude d'un servomoteur à aimants permanents et commutation électronique." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT068H.
Full textCros, Jérôme. "Définition d'un actionneur à aimants permanents et électronique intégrée pour l'automobile." Toulouse, INPT, 1992. http://www.theses.fr/1992INPT026H.
Full textKirouac, Mathieu. "Développement de modèles analytiques thermiques pour des machines à aimants permanents." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26232.
Full textCe mémoire porte sur le développement d’une modélisation thermique avec des modèles analytiques, pour la conception de machines électriques. Il concerne plus particulièrement les structures de machines cylindriques à aimants permanents. Nous discutons ensuite du modèle thermique complet de type circuit thermique qui a été réalisé et confronté à des résultats expérimentaux. Ce modèle a une très bonne précision et il nous a permis d’étudier l’effet de différentes variations topologiques sur le comportement thermique ainsi que différentes stratégies de refroidissement. Ce modèle peut facilement être intégré dans un processus d’optimisation. En nous basant sur les mêmes principes, nous avons proposé un nouveau modèle à résistances thermiques combinées pour modéliser les échanges thermiques entre les conducteurs dans les encoches. Ce modèle permet d’apprécier le caractère aléatoire de la disposition des conducteurs dans la bobine et peut être jumelé à un modèle plus global.
This thesis focuses on the development of a thermal modeling with analytical models for the design of electrical machines. It concerns more particularly cylindrical machine with permanent magnets. The methods used to determine the critical parameters of thermal modeling are presented first. We then present the complete thermal model that has been developed and confronted with experimental results. This model has very good accuracy and has allowed us to study the effect of different topological variations on the thermal behavior. It was also possible to analyze and compare different cooling strategies. This model can easily be integrated into an optimization process to determine the maximum permissible losses of a given configuration, or to define the cooling method to use. Based on the same principles, we proposed a new model to simulate the thermal exchanges between the conductors in the slots. This model allows us to appreciate the randomness of the arrangement of the conductors in the coil. It can be paired with a more comprehensive model of the machine in order to refine the resolution of the latter and ensure a more accurate analysis of the thermal behavior of the coils.
Guedia, Guemo Gilles Romuald. "Modélisation et caractérisation thermique de machines électriques synchrones à aimants permanents." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0023/document.
Full textPermanent magnet synchronous machines are likely to break down due to poorly controlled heating. The goal of this study was to develop a generic and predictive thermal model to calculate the temperature of machines during the design phase simulating temperatures at various states. These states include: steady state, transient state, fault mode, axial circulating of a cooling fluid in the air-gap and high speed. The lumped parameter method was used to develop this generic thermal model. Meanwhile, a test bench and a prototype instrumented with thermocouples were manufactured to validate the model at the same time. Sensitivity studies of the results of the model to some parameters demonstrated that some convective coefficients, contact conductances and the thermal conductivity of the winding in the radial direction influenced the model. However, these parameters are poorly known, because empirical formulas or abacus are used to calculate them. Using, the prototype and the developed model, these parameters were identified. Three methods of identification were tested in order to find a strategy for the identification: the genetic algorithms method, the Gauss-Newton method and the Levenberg-Marquardt method. Many tests were done on the prototype. The measure of the temperatures on the specific place allows to identify these parameters and to validate the model
Zire, Hakim Saber. "Conception et optimisation des moteurs à aimants destinés à l'entraînement direct." Besançon, 2005. http://www.theses.fr/2005BESA2059.
Full textThe research work carried out in this report depicts a study of high power permanent magnet synchronous motors intended to be used in traction applications. In this context, we have realized an optimum design methodology for several drives specifications : two of them were related to high torque and low speed applications (a 17 MW motor for ship propulsion system and a classical 10kW PM machine), the third one was an electrical drive for an in-wheel motor. The design analyse procedure was formulated in form of nonlinear constrained optimisation problem. It defines the entire physical phenomenon, the variables, the constraints and the objective function. The goal thus was to elaborate various optimisation methods making it possible to fulfil the required specifications. For this, an optimisation approach based on an analytical model and a gradient method (using the CAO tool Pro@DESIGN) was adopted as a principal methodology for the study and the optimization of the considered topologies. In order to improve the optimal solution so obtained by an analytical method, we had developed a novel optimization approach by a numerical simulation technique. The idea was to have an approximation of the objective function which is intern linked to the electromagnetic characteristics and the most influential parameters of the motor structure. These steps were applied to optimize the 10 kW machine, where a 20% improvement in torque/weight ratio was obtained versus the analytical approach
Ezzat, Marwa. "Commande non linéaire sans capteur de la machine synchrone à aimants permanents." Ecole centrale de Nantes, 2011. https://tel.archives-ouvertes.fr/tel-00625786.
Full textThe permanent magnet synchronous motor when comparedto other electric machines, is very present in motion control industrial applications. This is mainly because of its compactness, low inertia, dynamics performances, robustness, power density and simplicity of operation with mechanical sensor. However, sensorless control of this machine is always a difficult problem because of the observability loss problem. The aim of this thesis is to propose control laws for mechanical sensorless permanent magnet synchronous machine. Several observers, including a two order sliding mode observer (one based on the EMF and the other based on the full model), a super-twisting observer and an adaptive observer interconnected, were developed. Several nonlinear control laws were designed: higherorder sliding mode control with pre-determined trajectory, sliding mode higher-order quasi-continuous and backstepping control. The overall stability of the whole "Command + Observer" was shown in each case. Each case has also been validated on the benchmark “Control without mechanical sensor” of the Inter-GDR group “Control of Electrical Systems”
Bergmann, Claude. "Contribution à l'étude de la commande numérique directe de moteurs synchrones à aimant : modélisation, réalisation, expérimentations." Paris 6, 1986. http://www.theses.fr/1986PA066017.
Full textMiraoui, Abdellatif. "Dimensionnement optimal d'un moteur sans balais à aimants permanents Néodyme-Fer-Bore." Besançon, 1992. http://www.theses.fr/1992BESA2048.
Full textMesso, Léonide. "Étude, modélisation et optimisation des moteurs synchrones à griffes pour l'instrumentation des tableaux de bord des véhicules automobiles." Vandoeuvre-les-Nancy, INPL, 2001. http://www.theses.fr/2001INPL021N.
Full textSoulard, Juliette. "Étude paramétrique des ensembles convertisseur machine à aimants : Application à une structure électromagnètique monophasée hybride à aimants permanents et à alimentation électronique." Paris 6, 1998. http://www.theses.fr/1998PA066343.
Full textEzzat, Marwa. "COMMANDE NON LINEAIRE SANS CAPTEUR DE LA MACHINE SYNCHRONE A AIMANTS PERMANENTS." Phd thesis, Ecole centrale de nantes - ECN, 2011. http://tel.archives-ouvertes.fr/tel-00625786.
Full textKaddouri, Azeddine. "Étude d'une commande non-linéaire adaptative d'une machine synchrone à aimants permanents." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/NQ56837.pdf.
Full textKhaldi, Kamel. "Machine synchrone autopilotée à aimants permanents commandée à angle de décalage constant." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376065215.
Full textKhaldi, Kamel. "Machine synchrone autopilotée à aimants permanents commandée à angle de décalage constant." Lille 1, 1987. http://www.theses.fr/1987LIL10071.
Full textTeixeira, Julio Carlos. "Étude des machines synchrones à aimants permanents fonctionnant en réduction de flux." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0074.
Full textNdiaye, Abdoul Ousmane. "Compensation active des ondulations de couple d'un moteur synchrone à aimants permanents." Besançon, 2002. http://www.theses.fr/2002BESA2038.
Full textThe work carried out in this thesis presents a method of torque ripple compensation in permanent magnets synchronous motor without polar parts. The aim is the improvement of the electromechanical conversion quality by minimizing the torque ripple and the vibrations. The thesis starts with a presentation of the torque characteristics of the studied synchronous motor and the different causes of its torque ripples. In the second chapter, a computation method of optimal current harmonics is developed : starting from the back electromotive force harmonics of a magnet synchronous motor without polar parts, a minimal number of current harmonics are calculated to cancel the torque ripple while optimizing the efficiency. The third and fourth chapters present the test bench and the experimental study of the vibrations. The bench makes it possible one the one hand to fed synchronous motor with various current waveforms using a control system realized with the dSPACE tool and on the other hand to measure the vibrations of the system (bench-motor)
Fadat, Jérôme. "Moteurs synchrones à aimants ou à réluctance variable pour l'électroménager." Montpellier 2, 2000. http://www.theses.fr/2000MON20178.
Full textGasc, Laurent Fadel Maurice. "Conception d'un actionneur à aimants permanents à faibles ondulations de couple pour assistance de direction automobile approches par la structure et par la commande /." Toulouse : INP Toulouse, 2005. http://ethesis.inp-toulouse.fr/archive/00000073.
Full textSoumare, Yaghoub. "Synthèse et organisation de nanoparticules magnétiques anisotropes par Chimie Douce : nouveaux précurseurs pour aimants permanents." Paris 7, 2008. http://www.theses.fr/2008PA077184.
Full textAnisotropic magnetic nanoparticles have been prepared via chimie douce methods by raduction of cobalt(II) and nickel(II) carboxylate precursors in basic solutions of 1,2-propanediol at 170°C using heterogeneous nucléation. With acatates as matal precursors, Co₈₀Ni₂₀ nanowires with a mean diameter of 8 nm and a mean length more than 200 nm were generated. The use of new cobalt carboxylate precursors led to Co nanorods with a mean diameter of 20 nm and a mean length of 100 nm. Moreover, the aspect ratio (mean length / mean diameter) can be tailored by modifying accurately the reaction parameters such as the nature of the metallic precursor, the basicity of the medium or the temperature rate. The metallic Co₈₀Ni₂₀ nanowires and Co nanorods crystallise mainly with the hexagonal close packed structure with the c axis the growth axis of the particle. These nanomaterials are ferromagnetic at room temperature and when aligned using an external magnetic field, their magnetic properties are considerably improved. These results prompt us to use these particles as building blocks for the preparation of a new class of permanent magnets
Kong, Li. "Contribution à la conception d'un moteur à aimants permanents du type jante et à son alimentation." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL030N.
Full textThe subject of this dissertation is the study of a pennanent magnet brushless motor and its feed. Ing inverter in the application of an electric vehicle. The different systems of electric vehicles are reviewed in the first chapter. The solution retained is an in-wheel brushless motor with pennanent magnet NdFeB. The points focused in designing a brushless motor concem the minimisation of the harmonics and the temperature influences on the magnetic characteristics of the magnet NdFeB and, therefore, on the motor. In chapter 2, the magnets are divided in some blocks and are shifted up each other along the motor axis. Based on the static torque curve, the real dimensions of the magnets and the slots and the saturation effect have been taken into account in our study. In regular shifting, the best total shifting angle does not correspond to a tooth step. The irregular shifting is approved particularly efficient even in the case of3 magnet blocks. In the third chapter, the entire B(H) curves of NdFeB is described, for all temperatures, by means of the double variables Chebychev polynomial series. These expressions are integrated in the package Flux-Expert for determining the magnetic field of the machine (in 2D) by finite elements method. This motor is especially sensible to the temperature and the armature reaction does not change greatly the working point of magnet. The two stages DC AC-AC supply inverter allows to have a soft switching in the drive system and, therefore, a limited electromagnetic pollution in the vehicle. The behaviour of this inverter is simulated, in chapter 5, by means of a program adapted from the software A TOSEC. The simulation results show that themodulation frequency for the first stage of the inverter should be in the order of 20kHz for a good current regulation. The simulation is valid for a lspeed up to 75% of its maximum under the rated eurrent and the current control remains efficient when the current is shifted from the electromagnetic force by an angle and even with the presence of toothharmonies
Jebai, Al Kassem. "Commande sans capteur des moteurs synchrones à aimants permanents par injection de signaux." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2013. http://pastel.archives-ouvertes.fr/pastel-00818400.
Full textAbdel, Karim Nabil. "Optimisation multi-critères et multi-physique d'aérogénérateurs à aimants permanents à flux axial." Phd thesis, Université du Havre, 2008. http://tel.archives-ouvertes.fr/tel-00880881.
Full textRagot, Patrick. "Modélisation analytique multiphysique pour la conception optimale de moteurs synchrones à aimants permanents /." [S.l.] : [s.n.], 2008. http://library.epfl.ch/theses/?nr=4179.
Full textHatefi, Keyvan. "La conception assistée par ordinateur de moteurs et entraînements électriques à aimants permanents /." [S.l.] : [s.n.], 1994. http://library.epfl.ch/theses/?nr=1241.
Full textSchuster, Philippe. "Contribution à l'étude d'un imageur par résonance magnétique nucléaire utilisant des aimants permanents." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376010985.
Full textOuriagli, Mohammed. "Contribution à la synthèse de commandes robustes pour machines synchrones à aimants permanents." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL136N.
Full textSchwab, Hervé. "Stratégies de commande d'actionneurs synchrones à aimants permanents intégrant la sûreté de fonctionnement." Mulhouse, 2004. http://www.theses.fr/2004MULH0772.
Full textThis thesis deals with the dependability of permanent magnet synchronous motor drives for automotive applications. An example of an electric power steering system is particularly considered. A reliability analysis makes it first possible to establish that the Mosfet faults of the drive are the most important. New control strategies are then proposed to make the drive tolerant to this kind of fault. The classical three half bridge inverter has in the best case (with a modified field oriented control) a working degraded mode which produces a high torque ripple. From the study of the iso-torque curves in the stator current domain, it is possible to develop new control strategies which minimize this ripple. Experimentation with 3H and four half bridge inverters gives good results, similar to the faultless working mode
Fonseca, Armando. "Comparaison de machines à aimants permanents pour la traction de véhicules électriques et hybrides." Phd thesis, Grenoble INPG, 2000. http://tel.archives-ouvertes.fr/tel-00688674.
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