Dissertationen zum Thema „Convertisseur à un étage“
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Heydari, Elaheh. „Design and control of a new pulsating power decoupling circuit for grid-connected photovoltaic systems“. Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPAST004.
Der volle Inhalt der QuelleToday, grid-connected photovoltaic systems are becoming an increasingly important part of renewable energy. The power conversion system's heart is the grid-connected interface converter based on power electronics. The single-phase inverter is the best compromise for low power applications as an interface for power conversion. Single-stage systems offer higher efficiency and lower cost and size. However, the PV voltage drops under low irradiance conditions, leading to inverter shut down and the total injected power loss.As a consequence, single-stage systems suffer from a low operating range. This work addresses the critical issues of the single-stage single-phase grid-connected PV system, including reliability and efficiency. A fast terminal sliding mode combined with direct power control is proposed in the first part. It is associated with a maximum power point tracking algorithm with power output. Simulations and experimental results on a 1kW test bench show the proposal's effectiveness in terms of dynamic performance, low total harmonic distortion and robustness to irradiance variations. Single-phase power systems also face pulsating power at twice the mains frequency on the DC bus. This pulsating power should not be transferred to the PV side as it reduces the efficiency of the solar panel. Thus, the second part of this work proposes a dual-function decoupling circuit: it mitigates pulsating power and compensates for the voltage drop. Thanks to the following additional power converters, these objectives are fulfilled: a low power flyback and an H-bridge. The hybrid compensator increases the inverter's operating range, prevents its shutdown, and increases the system reliability. A 1kW experimental bench has been designed to evaluate the proposal for several operating points. The steady-state results show that the hybrid compensator can simultaneously achieve 85% compensation of the pulsating power and 20% compensation of the voltage drop. The circuit also shows good transient responses. In the third part of this work, monitoring and fault diagnosis of PV modules are addressed to increase system reliability, efficiency, and safety. The proposed fault diagnosis method is based on online PV impedance spectroscopy without additional equipment. It does not require interrupting the power production and uses the pulsating power decoupling circuit as an impedance spectroscopy tool. The simulation results, using MATLAB-Simulink®, show a reduction of more than 80% ripples amplitude of the PV modules terminal voltage. The results also show that impedance spectroscopy can estimate the PV module impedance parameters with a lower than 5% relative error. The evolution of these parameters during operation should make it possible to monitor the health of the panel
Benqassmi, Hassan. „Conception de convertisseurs alternatif-continu mono-étage à absorption sinusoïdale“. Grenoble INPG, 1998. http://www.theses.fr/1998INPG0058.
Der volle Inhalt der QuelleRecently, power factor correction has been introduced into power converters to replace the passive filters at the front-end of converters and to respect new standards corne into opération. Single-stage power factor correction has been succeeded to the classicaJ two-stage power factor correction which présents a high volume and cost. This thesis essentially consists of two types of applications. Low power isolated single-stage AC/DC conversion from 230 V rms. AC voltage to 54 V DC. The power is fixed at 300 W. Due to their cost and volume, asymmetrical structures Flyback and Sepic are more adapted. From this study, it émerges also that series-resonant converter operating in discontinuous conduction mode could be respond to desired spécifications if components stresses are acceptable. The second part deals with the isolated single-stage AC/DC conversion for médium power (3 kW) applications with 150 V as output voltage. For this kind of applications, only current-driven and voltage-driven résonant converters are susceptible to respond to the spécifications. An approach to design current-driven résonant converter is presented. Also, several résonant circuits are examined to discuss power factor correction capabilities of voltage-driven résonant converters. By evaluating advantages and disadvantages of thèse converters, two of them are chosen, and realised prototypes présent a high power factor and respect the European standards EN 61000-3-2
Inquimbert, François. „Calculs d'écoulements instationnaires dans un étage de turbine transsonique en interaction rotor-stator“. Lille 1, 1994. http://www.theses.fr/1994LIL10008.
Der volle Inhalt der QuelleHernández, Juan Manuel. „Commande numérique d'un convertisseur destiné à un véhicule hybride“. Toulouse, INPT, 1987. http://www.theses.fr/1987INPT069H.
Der volle Inhalt der QuelleMiliani, El Hadj. „Commande d'un convertisseur matriciel : application à un générateur actif“. Besançon, 2005. http://www.theses.fr/2005BESA2086.
Der volle Inhalt der QuelleThe author proposes a contribution to the control of a naturally commutated matrix converter used in a variable speed constant frequency generating system. The association of the matrix converter and the synchronous generator is called active generator. This work describes a low cost and robust solution for the frequency conversion by using natural commutations. In the first chapter, the author presents several examples of variable speed constant frequency generating systems which transform the variable speed mechanical energy to a constant frequency electrical power. The matrix converter topology and its operation principle are also described. In order to present the active generator, a detailed study of the association “matrix converter - six-phase synchronous generator” is detailed in the second chapter; the system operation under several constraints is given too. In the third chapter, the author presents an innovative control strategy which permits the simultaneous control of the frequency, the phase and the amplitude of the output wave; this strategy is based on cosine modulation waves. Contrary to the control strategy presented in the first chapter, this control philosophy permits to obtain a regulated output wave. The output voltage waveform is done in such a way that the actual output waveform always has the nearest possible instantaneous value to a sinusoidal reference waveform of desired output frequency, desired phase and amplitude. Commutation instants are determined by the intersection of the reference voltage and the cosine modulation waves. The last chapter deals with the implementation of the control strategies on a digital signal processor DSP. Experimental results are presented and compared to those obtained by simulation
Hernandez, Juan Manuel. „Commande numérique d'un convertisseur destiné à un véhicule hybride“. Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605896n.
Der volle Inhalt der QuelleCrevel, Flore. „Simulation numérique de l'écoulement en régime de pompage dans un compresseur axial multi-étage“. Phd thesis, Ecole Centrale de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00929734.
Der volle Inhalt der QuelleBastin, Grégoire. „Simulation numérique de l'écoulement instationnaire et turbulent dans un étage de turbine haute pression“. Ecully, Ecole centrale de Lyon, 2004. http://bibli.ec-lyon.fr/exl-doc/gbastin.pdf.
Der volle Inhalt der QuelleThe aim of this study concerns the use of numerical methods for the resolution of the Reynolds Averaged Navier Stokes equations adapted to the simulation of the cooling of the trailling edge of a stator in a HP turbine. The elsA solver developped at ONERA, is used with a four steps Runge Kutta time discretisation scheme and a Jameson centered space discretisation scheme. Turbulence is simulated either through the Michel, Spalart-Allmaras, k-l, k-w, k-e and ASM models. Some simulations of the flow in a bidimensional stator, with and without cooling (which is realized with the Chimera technique), are carried out. It validated this technique. The tridimensional simulation of a single cooled stator is also realized. Finally two steady computations, without and with cooling, and an unsteady computation without cooling are carried out on a high pressure turbine stage. These results make it possible to determine the effect of the cooling on the flow in a turbine stage
Billiard, Nicolas. „Interactions entre rangées d'aubes et effets de Clocking dans un étage et demi de turbine“. Ecully, Ecole centrale de Lyon, 2006. http://bibli.ec-lyon.fr/exl-doc/nbilliard.pdf.
Der volle Inhalt der QuelleThe present research, mostly experimental, consists in investigating and analyzing the aerodynamic and heat transfer in a one and half stage turbine. The turbine is tested under engine representative Reynolds number (106), Mach number (0. 9), gas to wall temperature ratio (1. 5) and gas to coolant temperature ratio (2. 1). Pressure and heat flux measurements were performed in order to obtain both steady and unsteady components of the flow field. Previous investigations focused on the interaction between the inlet guide vane and the rotor of the high-pressure stage. The current work highlights the interaction between the high-pressure stage and the second stator by characterizing clocking effects. The findings of this study may be used by designers to optimiste the position of the second stator in terms of effieciency, blade force fluctuations or heat load minimization
Smyej, Mohamed. „Conception d'un correcteur par logique floue pour un convertisseur CC/CC“. Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 2000. http://www.uqtr.ca/biblio/notice/resume/03-2216516R.html.
Der volle Inhalt der QuelleRaverdy, Bruno. „Simulation des grandes échelles de l'écoulement se développant dans un étage complet de turbine basse pression“. Paris 6, 2004. http://www.theses.fr/2004PA066574.
Der volle Inhalt der QuelleThibault, Robert. „Contrôle de l'énergie injectée dans un réseau électrique par un convertisseur triphasé utilisant un régulateur basé sur un modèle interne sinusoïdal“. Mémoire, École de technologie supérieure, 2006. http://espace.etsmtl.ca/511/1/THIBAULT_Robert.pdf.
Der volle Inhalt der QuelleThibault, Robert. „Contrôle de l'énergie injectée dans un réseau électrique par un convertisseur triphasé utilisant un régulateur basé sur un modèle interne sinusoïdal /“. Thèse, Montréal : École de technologie supérieure, 2006. http://proquest.umi.com/pqdweb?did=1253504381&sid=1&Fmt=2&clientId=46962&RQT=309&VName=PQD.
Der volle Inhalt der Quelle"Mémoire présenté à l'École de technologie supérieure comme exigence partielle à l'obtention de la maîtrise en génie électrique". CaQMUQET Bibliogr.: f. [139]-143. Également disponible en version électronique. CaQMUQET
Ondel, Olivier. „Diagnostic par reconnaissance des formes : Application à un ensemble convertisseur-machine asynchrone“. Phd thesis, Ecole Centrale de Lyon, 2006. http://tel.archives-ouvertes.fr/tel-00113102.
Der volle Inhalt der QuelleLa maintenance et la surveillance de ces deux systèmes permettent de rentabiliser les installations. Il est donc important de développer des outils de diagnostic pour détecter de manière précoce les défauts pouvant apparaître aussi bien sur le convertisseur que sur la machine.
Notre approche est basée sur l'utilisation des méthodes de reconnaissance des formes. Un vecteur de paramètres, appelé vecteur forme, est extrait de chacune des mesures effectuées sur la machine. Les règles de décisions utilisées permettent de classer les observations, décrites par le vecteur forme, par rapport aux différents modes de fonctionnement connus avec ou sans défaut.
Des défauts ont été créés au rotor et au stator de la machine asynchrone, alimentée soit à partir du réseau, soit par le biais d'un onduleur de tension.
La procédure de décision, basée sur la règle des k - plus proches voisins, associée à une fonction d'appartenance, permet de détecter l'évolution des modes de fonctionnements ainsi que les défauts avérés. Par la suite, le suivi d'évolution de ces modes est réalisé par une approche de type Kalman : un estimateur récursif de Kalman est utilisé pour déterminer les paramètres du modèle dynamique rendant compte de l'évolution d'un mode et un prédicteur de Kalman pour prévoir une évolution vers de nouvelles zones de l'espace. Ces algorithmes ont montré l'efficacité de l'application de la reconnaissance des formes au diagnostic.
MʾNasri, Hechmi. „Comportement d'un accumulateur au plomb associe a un convertisseur statique contine-continu“. Paris 6, 1988. http://www.theses.fr/1988PA066422.
Der volle Inhalt der QuelleMʼNasri, Hechmi. „Comportement d'un accumulateur au plomb associé à un convertisseur statique continu-continu“. Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37616548d.
Der volle Inhalt der QuelleOndel, Olivier Clerc Guy. „Diagnostic par reconnaissance des formes Application à un ensemble convertisseur-machine asynchrone /“. [S.l.] : [s.n.], 2006. http://bibli.ec-lyon.fr/exl-doc/oondel.pdf.
Der volle Inhalt der QuelleHamini, Ismaël. „Méthodes de moyennisation et systemes dynamiques hybrides : application à un ensemble convertisseur-machine“. Vandoeuvre-les-Nancy, INPL, 2003. http://www.theses.fr/2003INPL084N.
Der volle Inhalt der QuelleThe averaging theory gives a first solution to the problems of the analysis of hybrid systems. This approach applied to time varying systems leads to time invariant models that is simplified models which allow the analysis and control law design for these systems. The conditions of applicability, the properties and the limits of the models generated by these methods are defined in chapter JI of this thesis. Their field of validity, their asymptotic behavior and the relationships to steady operations of the exact solutions are important properties which make it possible to characterize the studied systems. The drives at variable speed fit largely in the context of the complex systems for which the traditional approaches quickly appeared limited because of their complexity (great dimension, bad conditioning. . . ). Many research tasks on the theoretical and methodological level were undertaken since the beginning of the years 1970 for modeling, analysis and synthesis of these systems. The application of averaging theory to PWM asynchronous machines, a typical hybrid system, is considered. A rigorous justification of the approximate modal usually used by engineers is given. Ln addition to provide an average modal, the proposed approach gives information on the precision of the approximation according to the speed of the machine and makes it possible to calculate an estimate of the variations around the solution of the average modal. A first order average modal is used to derive an estimate of these variations. This estimate is compared to the actual behavior and appears as a good approximation of the actual behavior of the PWM asynchronous machine. An extension of the proposed method to two time scale systems is also discussed
Fabre, Bernard. „Controle d'une eolienne darrieus par un convertisseur mecano-thermique a courants de foucault“. Paris 6, 1989. http://www.theses.fr/1989PA066177.
Der volle Inhalt der QuelleSeure, Bruno. „Sur un convertisseur direct réversible à transistors pour l'alimentation d'un moteur asynchrone diphasé“. Lille 1, 1986. http://www.theses.fr/1986LIL10117.
Der volle Inhalt der QuelleFabre, Bernard. „Contrôle d'une éolienne Darrieus par un convertisseur mécano-thermique à courants de Foucault“. Grenoble : ANRT, 1989. http://catalogue.bnf.fr/ark:/12148/cb37593896v.
Der volle Inhalt der QuelleSeure, Bruno. „Sur un convertisseur direct réversible à transistors pour l'alimentation d'un moteur asynchrone diphase“. Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376012187.
Der volle Inhalt der QuelleFèrid, Bélaïd. „Étude théorique et expérimentale des phénomènes thermiques dans un convertisseur électronique de puissance“. Thèse, Université du Québec à Trois-Rivières, 1990. http://depot-e.uqtr.ca/5514/1/000583789.pdf.
Der volle Inhalt der QuelleGrézaud, Romain. „Commande de composants grand gap dans un convertisseur de puisance synchrone sans diodes“. Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT107/document.
Der volle Inhalt der QuelleWide band gap devices already demonstrate static and dynamic performances better than silicon transistors. Compared to conventional silicon devices these new wide band gap transistors have some different characteristics that may affect power converter operations. The work presented in this PhD manuscript deals with a specific gate drive circuit for a robust, high power density and high efficiency wide band gap devices-based power converter. Two critical points have been especially studied. The first point is the higher sensitivity of wide band gap transistors to parasitic components. The second point is the lack of parasitic body diode between drain and source of HEMT GaN and JFET SiC. In order to drive these new power devices in the best way we propose innovative, robust and efficient solutions. Fully integrated gate drive circuits have been specifically developed for wide band gap devices. An adaptive output impedance gate driver provides an accurate control of wide band gap device switching waveforms directly on its gate side. Another gate drive circuit improves efficiency and reliability of diode-less wide band gap devices-based power converters thanks to an auto-adaptive and local dead-time management
Lebrun, Damien. „Realisation d'un dispositif utilisant un convertisseur metallique pour la radiographie eclair a haute energie“. Paris 6, 1998. http://www.theses.fr/1998PA066671.
Der volle Inhalt der QuelleMaçbahi, Hamid. „Correction de facteur de puissance dans un convertisseur à résonance par une méthode active“. Thèse, Université du Québec à Trois-Rivières, 1996. http://depot-e.uqtr.ca/4710/1/000626159.pdf.
Der volle Inhalt der QuelleVeglio, Monica. „Etude expérimentale et numérique des écoulements dans un étage de compresseur axial à basse vitesse en régime de fonctionnement instable“. Thesis, Paris, ENSAM, 2015. http://www.theses.fr/2015ENAM0053/document.
Der volle Inhalt der QuelleThe reduction of the environmental impact is nowadays one of the crucial challenges of the aeronautic industry. The quest to lower the consumption of aircrafts has led to more compact and higher loaded engines in general, and especially compressor stages. This leads an increase of the internal flow unsteadiness and to the occurrence of unstable phenomena. The experimental study, performed during this work, concerns the characterization of flows in an axial compressor stage during both the emergence of rotating stall and its stabilized phase, by means of unsteady pressure and velocity measurements. The originality of the work proposed resides in the use and the development of non-standard data processing methods. The wavelets transform reveals to be an interesting tool for the detection of short coherent structures, like the spike-type precursor as well as the instantaneous features of a rotating stall cell. Beside this local approach, different procedures for phase-locked field measurements were developed, according to the specification of each studied phenomenon and the experimental proceedings. Thanks to these methods, it was possible to highlight the pressure field evolution until the development of the rotating stall regime. The alignment of the tip leakage vortex with the rotor inlet section forecasts a spike type stall onset. The comparison between transitional phase and fully developed stall fields conducts to assert that the precursor represent only the embryonic stage of the rotating stall evolution. This approach led to appreciate the complexity of the internal structure of the cell that appears to be the succession of stall propagation phase, zero-loaded high flow rate region and reattachment phase
Abada, Sofiane. „Étude et optimisation d'un générateur photovoltaïque pour la recharge d'une batterie avec un convertisseur Sepic“. Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28486/28486.pdf.
Der volle Inhalt der QuelleGarreau, Clément. „Etude et modélisation de stratégies de régulation linéaires découplantes appliquées à un convertisseur multicellulaire parallèle“. Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0040/document.
Der volle Inhalt der QuelleThe parallel multilevel converters allow high current with a high power-weight ratio by associatingcommutation cells in parallel. This parallelization reduces the current in each cells and so onpermits to use standard range of components. With an adapted command the quality of the outputwaveforms is improved. This report will focus on a specific structure made off Buck converter withmagnetic coupling. Indeed thanks to the interleaved command, the output current ripple is reducedbut in return using separated inductances on each leg leads an increasing of the leg current ripple,directly linked to the number of leg and the ripple of the output current. In order to avoid thisproblem those inductances are replaced by one or more intercell transformers (ICT) that reducethe ripple of each leg current. However in a way to ensure unsaturated ICTs and good integrationit is necessary to balance the current of each leg despite parameter variation. Thus this report isfocused on modeling uncoupling methods for the system ensuring an equal distribution of thecurrents with duty cycles differences. Those modeling methods were generalized to achieve to analgorithm which generate control law whatever the number of leg. In the last part those controllaws are tested on a test bench by implementing them on a FPGA board to validate experimentallythe results
Achigui, Jeazet Hugues. „Convertisseur analogique-numérique à approximations successives opérant à 1-V dans un procédé CMOS submicronique“. Thèse, Université du Québec à Trois-Rivières, 2011. http://depot-e.uqtr.ca/2668/1/030286580.pdf.
Der volle Inhalt der QuelleNarat, Pierre. „Contrôle et observation d'états d'une machine asynchrone associée à un convertisseur statique : application à un groupe moto-pompe alimentée par un générateur photo-voltai͏̈que“. Toulouse, INPT, 1987. http://www.theses.fr/1987INPT008H.
Der volle Inhalt der QuelleNarat, Pierre. „Contrôle et observation d'état d'une machine asynchrone associée à un convertisseur statique application à un groupe moto-pompe alimenté par un générateur photo-voltaïque /“. Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37608376c.
Der volle Inhalt der QuelleDang, Thu Thuy. „Optimisation de l'ensemble convertisseur-générateur-commande intégré à un système de micro-cogénération thermo-mécano-électrique“. Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2013. http://tel.archives-ouvertes.fr/tel-01063146.
Der volle Inhalt der QuelleXhuvani, Aleksander P. „Modélisation et identification des paramètres d'une machine synchrone destinée à être alimentée par un convertisseur statique“. Toulouse, INPT, 1989. http://www.theses.fr/1989INPT055H.
Der volle Inhalt der QuelleAshry, Ahmed. „Récepteur RF pour la radio-logicielle basé sur un convertisseur analogique-numérique sigma-delta passe-bande“. Paris 6, 2012. http://www.theses.fr/2012PA066307.
Der volle Inhalt der QuelleMahmoud, Doaa. „Convertisseur analogique-numérique de type Sigma-Delta Passe-Bande avec résonateurs à un et deux amplificateurs“. Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS288.
Der volle Inhalt der QuelleSoftware defined radio receiver is a promising technique for future receivers which provides a variety of protocols. It digitizes the RF signal directly to low-frequency. We propose an SDR receiver based on a bandpass sigma delta modulator. The most essential element is the loop filter, there are two main configurations, an LC tank resonator and an active RC resonator. We focus on the active RC resonators for a low chip area. We target applications in the vicinity of 400 MHz, namely Advanced Research and Global Observation Satellite, Medical Implant Communication Service. We introduce a new comparison between the two-op-amp resonator CT BP sigma delta modulator and the one-op-amp resonator CT BP sigma delta modulator. We study the sensitivity of the quality factor and the signal to noise ratio to the DC-gain op-amps in two-op-amp resonator sigma delta modulator. It also shows how, in one-op-amp resonator sigma delta modulator, the quality factor and the signal to noise ratio, are very sensitive to any variations in the capacitors values for limited DC-gain op-amps. We establish a mathematical model of the thermal-noise behaviour for two-op-amp resonator CT BP sigma delta modulator. This model matches the circuit simulator results with a good accuracy. Furthermore, we demonstrate that a high quality factor (>100) of the two-op-amp resonators can be achieved by selecting the proper value of the integrator gain at a moderate DC-gain op-amp (35dB). Both sigma delta modulators are designed using flipped-well devices on fully depleted silicon on insulator technology, where we use body biasing to compensate the process, voltage and temperature variations
PLANAS, THIERRY. „Etude d'un generateur de rayons x base sur un convertisseur a resonance et de sa commande optimale“. Paris 11, 1998. http://www.theses.fr/1998PA112152.
Der volle Inhalt der QuelleKazemzadeh, Rasool. „Analyse du comportement d'un ensemble alternateur tétraphasé-convertisseur matriciel à commutation naturelle connecté sur un réseau triphasé“. Besançon, 2005. http://www.theses.fr/2005BESA2013.
Der volle Inhalt der QuelleAThis research relates to the study of an electrical power generation through a multiphase machine and a natural commutated matrix converter. The generator runs at high speed and the converter works as frequency changer. The system, turbo alternator and matrix converter is called activegenerator. In a first chapter, the principle of operating is presented and the commutation criterion using only measurable values is determined. In the second chapter, the behaviour of a four phase active generator connected to a three-phase electrical power network is studied by simulation, through analysis of currents, voltages and power on two sides of the converter. Their frequency spectra are also analyzed. The main drawback is a high value for a current sub harmonic in the generator. Two adjustement parameters of the active generator that are piloting angle and electromotive force of the machine are chosen and their influences are studied. In a third part, a simplified model of the system at the fundamental frequency is proposed allowing the study of the power transferred between the generator and the networks. A single-phase equivalent model is presented for the whole of the system considering constant ratio between currents and voltages on the both side. The active and reactive power axes at network side are determined that gives the operating range. In a last part, the behaviour of the system in transient state has been studied when the machine runs at variable speed. In this case the converter output frequency is perfectly controlled. Network fault and behaviour of the system are also studied
Morel, Florent. „Commandes directes appliquées à une machine synchrone à aimants permanents alimentée par un onduleur triphasé à deux niveaux ou par un convertisseur matriciel triphasé“. Lyon, INSA, 2007. http://theses.insa-lyon.fr/publication/2007ISAL0086/these.pdf.
Der volle Inhalt der QuelleAn electrotechnical system, and more particularly the association of a static converter and a load, constitutes a hybrid dynamic system. Indeed such a system can be seen like a continuous process controlled by an energy modulator having a finite number of configurations. For these applications, in order to obtain a powerful control of the position or speed, it is necessary to control the torque with a very fast dynamics. In this document, we deal only with torque control. We propose control laws which directly determine the configurations of the energy modulator to use in order to track as soon as possible the references of the continuous state-variables of the system. As the computing duration has to be very short (a few tens of microsecond), a local simplified model which takes into account the behavior of the whole energy modulator - continuous process is used. Various control strategies are developed. For the first one, after having predicted the behavior of the system for a given horizon for each possible configuration, various cost functions can be used to choose an adequate configuration which will be applied during the next computation cycle. For the second one, several configurations and their respective application times are determined at each occurrence of the algorithm. With this strategy, performances during steady state operation are improved and the constraint for calculation duration is reduced. The third method has the advantage of not exploring all the possible configurations by directly calculating the duty cycles (over a calculation period) of the discrete elements of the energy converter. This simplifies the algorithm and facilitates its implementation in real time. All these methods were validated with experiments in the first part of this document with a Permanent Magnet Synchronous Machine (PMSM) controlled by a two-level three-phase inverter. The second part is devoted to the use of a matrix converter. After its realization by ourselves, the first control strategy is applied to the whole matrix converter - PMSM. Experimental results confirm the effectiveness of the proposed approach. This original methodology is exploitable for the control of converters of with more complex structures
Morel, Florent Rétif Jean-Marie. „Commandes directes appliquées à une machine synchrone à aimants permanents alimentée par un onduleur triphasé à deux niveaux ou par un convertisseur matriciel triphasé“. Villeurbanne : Doc'INSA, 2008. http://docinsa.insa-lyon.fr/these/pont.php?id=morel.
Der volle Inhalt der QuelleRabelo, joca Davi. „Une Topologie CA-CC Baseé sur un Convertisseur Modulaire Multiniveau Entrelacé Faisible à Applications de Transformateur d’Électronique de Puissance“. Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC010/document.
Der volle Inhalt der QuelleThis work aims to present thetheoretical study, the numerical analysis and theexperimental validation of a power electronicsconverter topology based on an interleavedmodular multilevel converter with mediumfrequencytransformer. The architecture issuitable for the AC-DC stage in solid-statetransformer applications for the connectionbetween a medium-voltage AC grid and a lowvoltageDC grid. The interleaving reduces theswitch conduction losses. The 10 kHz mediumfrequencytransformer provides galvanicisolation and connects the interleaved modularmultilevel converter to a full-bridge converter.From the converter structure, the principle ofoperation, the modeling, the modulationtechnique, and the control scheme are discussed.One feature of the converter is the simultaneousgeneration of the low-frequency grid voltageand the medium-frequency transformer primaryvoltage. The capacitor voltage balancing and thecirculating currents minimization are combinedtogether in a single algorithm. The controlsystem regulates the AC current and the DC busvoltage, on the high-voltage side, and the DCvoltage and power flow, on the low voltage side.The experimental validation of the converter ismade with a scaled-down single-phase 720 Wprototype. The results demonstrate the controlsystem stability in steady-state and dynamic(load step, power flow inversion) operations
Veychard, Damien. „Conception et réalisation d'un convertisseur électro-thermique à grande constante de temps en technologie microsystème pour un disjoncteur thermique“. Grenoble INPG, 1999. http://www.theses.fr/1999INPG0191.
Der volle Inhalt der QuelleAmmann, Frédérick. „Conception d'un convertisseur d'électronique de puissance pour un système de stokage hybride batteries/super-condensateurs : application dans les véhicules électriques“. Mémoire, École de technologie supérieure, 2012. http://espace.etsmtl.ca/1028/1/AMMANN__Fr%C3%A9d%C3%A9rick.pdf.
Der volle Inhalt der QuelleRoy, Nicolas. „Réalisation d'un convertisseur temps-numérique en CMOS 65 nm pour une intégration par pixel dans un module de comptage monophotonique“. Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8142.
Der volle Inhalt der QuelleAbidi, Mouadh. „Conception et implémentation d'un convertisseur temps numérique dans un ASIC en technologie CMOS 0,18 ?m, appliqué à la tomographie d'émission par positrons“. Mémoire, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6147.
Der volle Inhalt der QuelleTrabelsi, Mohamed. „Contribution au diagnostic de défauts des composants de puissance dans un convertisseur statique associé à une machine asynchrone - exploitation des signaux électriques -“. Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4342.
Der volle Inhalt der QuelleThe main goal of this thesis concerns the detection and identification of simple and multiple open-circuit faults in voltage source inverters (VSIs)-fed induction motor drives. In first step, the potentialities, the weaknesses as well as the uncertainties of the previously published works have been discussed. The second step was dedicated to the study of the inverter faults impact on the induction motor. For this purpose, we have proposed two methodologies permitting the characterization of the electromagnetic torque behaviour as well as the electric variables of the induction motor under the open- and short-circuit faults. These preliminary studies allowed to propose two novel signal-based approaches for open-circuit fault diagnosis in voltage source inverter. The measured outputs inverter voltages and currents have been used as the input quantities for the fault detection and identification (FDI) process. The first approach consists in analyzing the pulse-width modulation (PWM) switching signals and the line-to-line voltage levels during the switching times, under both healthy and faulty operating conditions. For this purpose, we have adopted an instantaneous representation of these variables, which permits their analysis over one switching period. The fault diagnosis scheme is achieved using simple analog device. This circuit allows an accurate single and multiple faults diagnosis, and a minimization of the fault detection time which becomes about a few tens of microseconds
Sorli, Brice. „Conception et réalisation de capteurs d'humidité utilisant un convertisseur thermoélectrique à détection mécanique, thermique et optique : application à la mesure d'aw dans l'agroalimentaire“. Montpellier 2, 2001. http://www.theses.fr/2001MON20114.
Der volle Inhalt der QuelleGustin, Frédéric. „Etude d'un convertisseur DC-AC-AC à commutation douce découplé par un transformateur haute fréquence : modélisation, conception et application à la propulsion électrique“. Besançon, 2000. http://www.theses.fr/2000BESA2057.
Der volle Inhalt der QuelleThe aim of this thesis is the study and design of a soft switching high power converter for transport applications and especially heavy vehicles. First part is dedicated to the choice of the converter structure and a detailed behavioural study. Parameters of this converter has been identified and quantified such as 18 kW as nominal power, 400 V as output voltage and 67 V as input voltage from a DC fixed source. Switching output frequency has been fixed to 40 kHz. Second chapter will present the study of a high frequency transformer integrated into the this converter. A behavioural model of the transformer has been defined in order to perform simulations by means of SABER software. Two technologies of transformers are used for this case : as a first classical one, a wounded transformer is used and for the second one planar technology is tested. The author validates these models by simulation and experimental results. In the third chapter, the command strategy of this converter is detailed with the driving of the 16 electronic switches and also constraints on the signals in order to perform a good behaviour in soft switching techniques. The fourth part presents various models developed in order to simulate this converter by SABER software. Linear switching semiconductor MOSFET and IGBT models have been defined. A study and a proposal of a brushless DC motor model with trapezoidal back emf are detailed. The model is then written using MAST programming language. Finally various command blocks have been described. In the fifth chapter, the author presents experimental test results which has been performed on an test bench but for electrical powers up to9 kW with passive loads (RL) and active load (brushless DC motor). Various tests have been proposed to validate this structure with special attention to efficiency and losses under different load conditions. As a conclusion the author shows the interesting case when more than one motor is used and the electrical energy will be fed to the motors by means of AC high frequency energy distribution
Ménéghin, Grégory. „Intégration en technologie BiCMOS et caractérisation d'un convertisseur de fréquence de réception pour un radar automobile en bande W assurant des communications inter-véhicules“. Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-01067441.
Der volle Inhalt der QuelleMeneghin, Grégory. „Intégration en technologie BiCMOS et caractérisation d'un convertisseur de fréquence de réception pour un radar automobile en bande W assurant des communications inter-véhicules“. Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2708/.
Der volle Inhalt der QuelleThanks to the developments realized over the last decade, the nanoscale silicon technologies have become very competitive with III-V for millimeter-wave applications exceeding 100 GHz. The exclusive high integration levels of the silicon make it particularly well suited to design complex systems. In this thesis the background example of a W-band automotive impulse radar with inter-vehicle wireless data link is used to evaluate the capabilities of SiGe BiCMOS technology for the design of W-band zero-IF down-conversion mixer. When a zero-IF down-converter has to be designed, the passive mixer represents the best choice thanks to its absence of flicker noise. This mixer employs NMOS transistors in any Si-based technology. Among its benefits, one has to highlight its large linearity and a low noise figure equaling its conversion losses. Whereas it is widely used in low-power RF zero-IF receivers, the frequency limitations of this topology are not well-defined. The first part of this work evaluates the feasibility of this topology up to the W-band using a 0. 13 µm SiGe BiCMOS technology. The geometry of NMOS device is widely discussed regarding conversion losses and linearity. These results are then employed to design a 79 GHz down-converter including the RF and LO drivers as well as the IF amplifier. Finally, a test-bench is also developed to characterize the designed down-converter. Experimental results indicate state-of-the-art performances with a conversion gain of 14. 5 dB at an optimal center frequency of 76 GHz, a double-sideband noise figure of 6. 3 dB and an output compression point of -10dBm. These results, close to the electrical simulations, validate the whole design methodology