Dissertations / Theses on the topic 'Convertisseurs continu/continu'
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Lagier, Thomas. "Convertisseurs continu-continu pour les réseaux d'électricité à courant continu." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0084.
Full textThe catastrophic environmental effects seen in the last couple of decades have encouraged many countries to increase the proportion of C02-free energy from renewable sources. However, for the easier integration of these energies on a large scale, the need of a European SuperGrid has emerged. This new grid, mainly based on High-Voltage- Direct-Current (HVDC) will require the use of DC-DC converters. Therefore, this manuscript proposes and studies topologies based on the association of isolated elementary DC-DC converters. It is organized in one introduction, 3 chapters and one conclusion. In the introduction, a state-of-the-art of the technologies currently used in HVDC applications is proposed. The context of the study, linked to development of the meshed DC grids, is developed afterwards. In the first chapter, solutions based on the association of elementary isolated DC-DC converters are studied and then compared in terms of reactive components sizing and efficiency. This study permitted the selection of three topologies for the rest of our work. In the second chapter, we mention the issues which may appear during the implementation of the solution. Then, by taking an offshore wind farm as application case, the solution is compared, in terms of loss and component number, with a topology based on the association of Modular Multilevel Converters (MMC) currently used in HVDC grids. The third chapter presents the study and the implementation of two 100 kW DC-DC converter prototypes, operating at 1.2 kV. These prototypes allowed the experimental validation of the performances of the topologies studied in the first chapter. Finally, the last part proposes a conclusion of the work achieved in this thesis. This work allowed it to be shown that the proposed solutions are interesting for the selected application case
Sadarnac, Daniel. "Contribution a l'augmentation de la puissance massique des convertisseurs continu-continu." Paris 11, 1991. http://www.theses.fr/1991PA112343.
Full textHaddadi, Smaïl. "Conception méthodique et optimisation d'un convertisseur continu-continu Forward résonant." Lyon 1, 1990. http://www.theses.fr/1990LYO10174.
Full textRanson, Jean-Luc. "Influence des capacités parasites du transformateur et des interrupteurs dans les convertisseurs continu-continu isolés : application au montage Forward." Lille 1, 1999. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1999/50376-1999-247.pdf.
Full textAbida, Wassim. "Contribution a l'augmentation de la frequence de decoupage des convertisseurs continu - continu." Paris 11, 1996. http://www.theses.fr/1996PA112223.
Full textGuinjoan, Francisco. "Etude du comportement à fort signal des convertisseurs continu-continu approche par un modèle continu non linéaire." Toulouse 3, 1992. http://www.theses.fr/1992TOU30010.
Full textGaubert, Jean-Paul. "Nouvelles structures de convertisseurs continu continu sans transformateur à rapport de transformation élevé." Lille 1, 1992. http://www.theses.fr/1992LIL10149.
Full textCostan, Valentin Meynard Thierry. "Convertisseurs parallèles entrelacés étude des pertes fer dans les transformateurs inter-cellules /." Toulouse : INP Toulouse, 2008. http://ethesis.inp-toulouse.fr/archive/00000510.
Full textHuang, Bin Davat Bernard Martin Jean-Philippe. "Convertisseur continu-continu à rapport de transformation élevé pour applications pile à combustible." S. l. : S. n, 2009. http://www.scd.inpl-nancy.fr/theses/2009_HUANG_B.pdf.
Full textSendanyoye, Vénuste. "Analyse de régime transitoire des convertisseurs continu-continu à résonance fonctionnant à haute fréquence." Thèse, Université du Québec à Trois-Rivières, 1989. http://depot-e.uqtr.ca/5575/1/000583323.pdf.
Full textCastelein, Pierre. "Méthode d'analyse du comportement dynamique de convertisseurs DC-DC de classe E2 : application à la conception de convertisseurs de classe E2 régulés." Lille 1, 1997. http://www.theses.fr/1997LIL10067.
Full textGaye, Mamadou. "Convertisseurs continu-continu à très haute fréquence de découpage : conception, réalisation et étude de l'asservissement." Lille 1, 2002. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2002/50376-2002-183.pdf.
Full textTatakis, Emmanuel. "Modélisation et simulation des convertisseurs statiques continu-continu mettant en oeuvre des transistors Mosfet de puissance." Doctoral thesis, Universite Libre de Bruxelles, 1989. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213244.
Full textLOUATI, KHALED. "Contribution a l'augmentation de la puissance des convertisseurs continu-continu a resonance fonctionnant a frequence elevee." Paris 11, 1996. http://www.theses.fr/1996PA112059.
Full textGarcia, de Vicuña José Luis. "Etude du comportement à fort signal des convertisseurs continu-continu : approche par un modèle discret non linéaire." Toulouse 3, 1992. http://www.theses.fr/1992TOU30009.
Full textGarcia, Arregui Marcos Astier Stéphan Turpin Christophe. "Theoretical study of a power generation unit based on the hybridization of a fuel cell stack and ultracapacitors application to the design of an aircraft emergency electrical network /." Toulouse : INP Toulouse, 2008. http://ethesis.inp-toulouse.fr/archive/00000521.
Full textUsman, Iftikhar Muhammad. "Contribution à la modélisation des convertisseurs continu/continu dans une perspective de commande – Influence du filtre d'entrée." Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00351188.
Full textEn ce qui concerne la commande, la stabilité est d'une importance capitale dans tout système de régulation de tension. Toutefois, assurer la stabilité en boucle fermée n'est pas évident en présence d'un filtre en entrée du convertisseur. L'origine de ce problème réside dans l'interaction du filtre avec le comportement du convertisseur dc/dc de type « résistance dynamique négative ». La littérature fournit une solution pour résoudre ce problème et propose une solution « passive » pour amortir les oscillations liées au filtre d'entrée. La valeur de la résistance d'amortissement nécessaire peut être déterminée en utilisant un modèle de convertisseur idéal. Toutefois, cette valeur n'est pas systématiquement confirmée par l'expérience. Dans cette thèse, des fonctions de transfert en régime de petits signaux sont utilisés pour formuler systématiquement des règles de dimensionnement pour éviter l'instabilité. Les régions de la stabilité sont déterminées en fonction des paramètres du circuit d'amortissement. Cette approche est étendue au cas de convertisseurs en cascade. Tout au long de cette étude, la modélisation moyenne en petit-signal est utilisée pour l'analyse de la stabilité.
Bien que l'ajout d'une résistance suffisante assure la stabilité, l'amortissement passif est critiquable à cause de pertes énergétiques indésirables dans les résistances utilisées. Afin d'en étudier les retombées sur le rendement du convertisseur, les pertes dues à l'amortissement sont quantifiées d'une manière plus systématique dans cette thèse. Une analyse théorique de ces pertes est présentée dans diverses conditions de fonctionnement. La validation expérimentale est toujours présente. Les résultats obtenus sont généralisés à toutes les topologies fondamentales de convertisseurs.
L'un des principaux thèmes de cette thèse touche au développement d'une commande assurant la stabilité du convertisseur dc/dc avec son filtre d'entrée sans utiliser d'amortisseur dissipatif.
Afin d'atteindre cet objectif, une solution avec commande par retour d'état et placement des pôles est proposée. Un modèle moyen d'ordre élevé est mis en place pour concevoir un correcteur qui combine le retour d'état avec une boucle PI. L'efficacité de l'algorithme de commande proposé est démontrée par des résultats de simulation. Il apparaît que des performances dynamiques intéressantes peuvent être atteintes en présence de grandes perturbations en utilisant un retour d'état avec gains variables. En outre, cette stratégie de commande assure la stabilité du système sans composant passif additionnel dans le filtre d'entrée et sans pertes supplémentaires. Ensuite, dans un deuxième temps, une commande par mode-glissement basée sur l'approche de la fonction de Lyapunov est discutée, laquelle est présentée dans la litérature pour l'ensemble abaisseur-filtre. Nous discutons les performances de la commande par retour d'état, proposée dans cette thèse, comparées à celles d'un contrôleur mode-glissant.
Yang, Fuji. "Etudes d'opérateurs analogiques temps-continu et mixtes analogiques-numériques /." Paris : Ecole nationale supérieure des télécommunications, 1993. http://catalogue.bnf.fr/ark:/12148/cb35607151z.
Full textLabouré, Eric. "Contribution à l'étude des perturbations conduites dans les alimentations continu-continu isolées." Cachan, Ecole normale supérieure, 1995. http://www.theses.fr/1995DENS0010.
Full textHuang, Bin. "Convertisseur continu-continu à rapport de transformation élevé pour applications pile à combustible." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL021N.
Full textThis work deals with the study, design and building of a DC-DC converter, which is associated with a fuel cell source. According to the application, this converter should have a high voltage ratio which is about 12, and it is able to limit the ripple current of source below 1% of the maximum average current. A cascaded structure composed by two converters has been chosen and allows obtaining a high voltage ratio. The first stage is an interleaved Boost associated with a L-C input filter, to reduce ripple of the current delivered by the source. The second stage is a three-level Boost which reduces the voltage stress of the switches, thereby reducing losses of the converter. The control of the converter is defined basing on the use of a non-linear regulator. Thanks to use the flatness control, the global control is realized through the regulation of the intermediate voltage and of the power transited to the load. Finally, a small power test converter (3 kW) has been realized, in order to validate the converter operation and the proposed control
Benqassmi, Hassan. "Conception de convertisseurs alternatif-continu mono-étage à absorption sinusoïdale." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0058.
Full textRecently, 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
Laur, Jean-Pierre. "Étude et conception d'un bras de pont pour convertisseur continu-continu à résonance à très haute fréquence." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT078H.
Full textAlmeida, Anani Sylvain d'. "Contribution a l'etude et a la mise en uvre de structures de convertisseurs continu-continu a frequence elevee." Paris 6, 1991. http://www.theses.fr/1991PA066005.
Full textHernández, Juan Manuel. "Commande numérique d'un convertisseur destiné à un véhicule hybride." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT069H.
Full textVideau, Nicolas. "Convertisseurs continu-continu non isolés à haut rapport de conversion pour Piles à Combustible et Electrolyseurs - Apport des composants GaN." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2014. http://tel.archives-ouvertes.fr/tel-00988205.
Full textHuang, Bin. "Convertisseur continu-continu à rapport de transformation élevé pour applications pile à combustible." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL021N/document.
Full textThis work deals with the study, design and building of a DC-DC converter, which is associated with a fuel cell source. According to the application, this converter should have a high voltage ratio which is about 12, and it is able to limit the ripple current of source below 1% of the maximum average current. A cascaded structure composed by two converters has been chosen and allows obtaining a high voltage ratio. The first stage is an interleaved Boost associated with a L-C input filter, to reduce ripple of the current delivered by the source. The second stage is a three-level Boost which reduces the voltage stress of the switches, thereby reducing losses of the converter. The control of the converter is defined basing on the use of a non-linear regulator. Thanks to use the flatness control, the global control is realized through the regulation of the intermediate voltage and of the power transited to the load. Finally, a small power test converter (3 kW) has been realized, in order to validate the converter operation and the proposed control
Kourda, Ferid. "Simulation d'alimentation à découpage sur micro-ordinateur." Lyon, INSA, 1989. http://www.theses.fr/1989ISAL0031.
Full textDulthummon, Sakaldip. "Analyse et dimensionnement optimal d'un convertisseur statique continu-continu, multi-résonnant en tension et à haute fréquence de découpage." Lyon 1, 1993. http://www.theses.fr/1993LYO10287.
Full textVideau, Nicolas. "Convertisseurs continu-continu non isolés à haut rapport de conversion pour piles à combustible et électrolyseurs - Apport des composants GaN." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/15740/7/Videau_2.pdf.
Full textCostan, Valentin. "Convertisseurs parallèles entrelacés : étude des pertes fer dans les transformateurs inter-cellules." Phd thesis, Toulouse, INPT, 2007. http://oatao.univ-toulouse.fr/7609/1/costan.pdf.
Full textVerdicchio, Andrea. "Nouvelle électrification en courant continu moyenne tension pour réseau ferroviaire." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0093.
Full textSince the beginning of the 20th century, various DC and AC rail electrification systems have beendeveloped in Europe. Single-phase, medium-voltage AC systems (25 kV-50 Hz or 15 kV 16.7 Hz)allow the use of a light overhead-line of small copper cross-section but by their principle involvefluctuating power and reactive power that have to be compensated by large and expensivedevices. DC electrification systems (1.5kV or 3kV) do not have these disadvantages but in return,their relatively low voltage level involves the circulation of high currents in the overhead-line whichlimits any increase in traffic because the copper section cannot be increased beyond 1000 mm2.From a rolling stock point of view, AC powered locomotives have a complex and voluminousconversion chain (step-down transformer, rectifier, low-frequency filter and traction inverter). Onthe other hand, a conversion chain operating under direct current catenary is reduced to an inputfilter and a traction inverter. Today, the technological progress made in the field of powerelectronics makes it possible to envisage the development of medium voltage DC grids to supportthe energy transition by integrating more easily renewable energy sources and storage devices.On the basis of this observation, the aim of this thesis is to propose a new medium voltage DCrailway electrification system, on the one hand, with the aim of combining the advantages of thecurrent railway electrification systems and on the other hand, to consider in the medium term therenovation of lines electrified in DC. The first chapter of this thesis presents a state of the art ofexisting railway electrification systems and associated traction chains. The second chapterhighlights the interest of a medium voltage DC electrification for railway traction. A calculationmethod for determining the DC voltage level for a given traffic is proposed. Therefore, it is shownthat the choice of a voltage level at 9 kV makes it possible to obtain an overhead-line cross-section and a substation spacing comparable to the 25 kV-50 Hz system. In its first part, the thirdchapter proposes a strategy to upgrade the existing 1.5 kV French electrification system to a 9 kVsystem. Until the fleet of traction units is adapted to operate at 9 kV, it is possible to prepare theevolution of the electrification system by deploying a transmission line at 9 kV (feed-wire) inparallel with the existing 1.5 kV overhead-line. At the end of the transition period, the 1.5 kVvoltage level is completely removed and the entire infrastructure as well as the traction unitsoperate at 9 kV. The second part of this chapter is dedicated to the study of a topology, based onan association of isolated DC/DC converters, to fulfil the function of solid state transformer whichis essential for the power reinforcement of the 1.5 kV system from the 9 kV feed-wire. The fourthchapter presents the realization and tests of an isolated DC / DC converter with a power level of300 kW using 3.3 kV SiC MOSFET modules. A general conclusion and perspectives conclude thismanuscript
Balocco, Didier. "Contribution à la conception de convertisseurs alternatif-continu à faible taux d'harmoniques." Bordeaux 1, 1998. http://www.theses.fr/1998BOR10565.
Full textWang, Bin. "Analysis of Dual Randomized Modulation to Reduce EMI in Power Converters." Clermont-Ferrand 2, 2003. http://www.theses.fr/2003CLF21427.
Full textWilmot, Franck. "Contribution à la conception et au dimensionnement de fonctions passives intégrées." Cachan, Ecole normale supérieure, 2004. http://www.theses.fr/2004DENS0044.
Full textThis work is the scientific and technological field of power electronics devices and more particularly in DC/DC converters. In this environment, the reduction of scale, the efficiency, the reliability are the principal challenges. This research field is called "power integration". We extended the integration principle to the passive components which are the main bottleneck to power integration. Therefore, we defined two new structures of integrated passive components. In the first one the whole structure is co-fired and in the second one we used an innovating assembly process. In this structure, the planar form is well adapted to thermal dissipation. We proposed an innovating design method, which takes into account thermal constraints. We designed and realized a 60W, 500kHz forward SMPS prototype with very interesting performances such as, for instance, a power density of 4kW/litre with a natural convection
Ichihashi, Motoï. "Gestion localisée de la puissance dans un système sur puce complexe." Paris, Télécom ParisTech, 2010. http://www.theses.fr/2010ENST0007.
Full textToday, the increasing complexity of Systems-on-Chip (SoC) leads to a high number of logic modules on the same chip. At chip level, the Dynamic Voltage and Frequency Scaling technique has been proposed to reduce efficiently the global power consumption. This work is motivated by the need of a local power supply at module level to further reduce the global power. This thesis overviews low-power techniques and dc-dc converters, and focuses on the design of a local power management sub-system. The main issue is to design on-chip dc-dc down converters able to deliver a scalable voltage power supply to each module of a complex SoC for Dynamic Voltage Scaling purpose. To maintain high power efficiency, the converter is configurable according to the operating mode (active, idle or stand-by) of the supplied module. Using asynchronous oscillating frequency control and segmented gate drivers, the efficiency is extended over a wide output power range. In the stand-by mode, the power supply is shut down to reduce static power losses. In order to achieve an easy integration, the converter has been designed to be generic, fully asynchronous, of small area and compatible with the I/O cell library. Each converter requires only two external passive components whose values are compatible with in-package integration. The proposed local power supply has been implemented in a 65-nm CMOS technology and validated. This IP-like converter opens new perspectives to further improve the fine-grain DVS technique. The next main issue consists in designing smart dc-dc converters able to maintain the best efficiency whatever the variations of process, external passives components and power needs
Serbia, Nicola. "Convertisseurs modulaires multiniveaux pour le transport d'énergie électrique en courant continu haute tension." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0007/document.
Full textThis work was performed in the frame of collaboration between the Laboratory on Plasma and Energy Conversion (LAPLACE), University of Toulouse, and the Second University of Naples (SUN). This work was supported by Rongxin Power Electronic Company (China) and concerns the use of multilevel converters in High Voltage Direct Current (HVDC) transmission. For more than one hundred years, the generation, the transmission, distribution and uses of electrical energy were principally based on AC systems. HVDC systems were considered some 50 years ago for technical and economic reasons. Nowadays, it is well known that HVDC is more convenient than AC for overhead transmission lines from 800 - 1000 km long. This break-even distance decreases up to 50 km for underground or submarine cables. Over the twenty-first century, HVDC transmissions will be a key point in green electric energy development. Due to the limitation in current capability of semiconductors and electrical cables, high power applications require high voltage converters. Thanks to the development of high voltage semiconductor devices, it is now possible to achieve high power converters for AC/DC conversion in the GW power range. For several years, multilevel voltage source converters allow working at high voltage level and draw a quasi-sinusoidal voltage waveform. Classical multilevel topologies such as NPC and Flying Capacitor VSIs were introduced twenty years ago and are nowadays widely used in Medium Power applications such as traction drives. In the scope of High Voltage AC/DC converters, the Modular Multilevel Converter (MMC), proposed ten years ago by Professor R. Marquardt from the University of Munich (Germany), appeared particularly interesting for HVDC transmissions. On the base of the MMC principle, this thesis considers different topologies of elementary cells which make the High Voltage AC/DC converter more flexible and easy suitable respect to different voltage and current levels. The document is organized as follow. Firstly, HVDC power systems are introduced. Conventional configurations of Current Source Converters (CSCs) and Voltage Source Converters (VSCs) are shown. The most attractive topologies for VSC-HVDC systems are analyzed. The operating principle of the MMC is presented and the sizing of reactive devices is developed by considering an open loop and a closed loop control. Different topologies of elementary cells offer various properties in current or voltage reversibility on the DC side. To compare the different topologies, an analytical approach on the power losses evaluation is achieved which made the calculation very fast and direct. A HVDC link to connect an off-shore wind farm platform is considered as a case study. The nominal power level is 100 MW with a DC voltage of 160 kV. The MMC is rated considering press-packed IGBT and IGCT devices. Simulations validate the calculations and also allow analyzing fault conditions. The study is carried out by considering a classical PWM control with an interleaving of the cells. In order to validate calculation and the simulation results, a 10kW three-phase prototype was built. It includes 18 commutation cells and its control system is based on a DSP-FGPA platform
Simon-Muela, Adan. "Architectures de convertisseurs DC/DC basse tension et fort courant avec commande numérique." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/375/.
Full textThe power consumption of embedded microprocessors has significantly increased due to the considerable number of new functions which they should manage currently. Furthermore, the present reduction of the lithographical dimensions and the augment of the number of transistor and their switching frequency are new constraints to consider from the point of view of power supply requirements. Thus, current generation of microprocessors needs considerable supply currents with very low voltages (around 1V). Moreover, the required slew-rates are also important (500A/µs). Then, to achieve these strict power supply levels, the main design trend is to place the power converter as close as possible to the load to minimize the transmission losses and to optimize the power matching. This concept is know as Point-of-Load converters which allows designers to obtain distributed power supply architectures using one or more intermediate common voltage bus supplying several ICs. The aim of this dissertation is to study these DC/DC PoL converters and their association to increase the current supply levels delivered to the charge. Hence, our PoL converters are mainly based on those used as voltage regulators modules (VRMs) owning high-current, low-voltage and high switching frequency. These VRMs serves as power supply systems oriented to embedded microprocessors like those we can find inside PC motherboards. Referring VRMs, interleaved or multiphase architectures are preferred to achieve these strict supply powers. Traditionally, this kind of power supplies owns analog control. However, new microprocessors generation demands faster performances and more accurate and tight regulations. Thus, the present trend is to replace the classical analog control by a digital control system more flexible and performing likewise. Then, this dissertation takes part in the LISPA regional project where the LAAS and Freescale Semiconductor collaborate to develop new power supply systems for embedded power microprocessors
Jarrousse, Jean-Michel. "Conception d'un convertisseur DC/DC à très haute fréquence pour l'alimentation d'une cellule radar, contributions à son intégration." Cachan, Ecole normale supérieure, 2008. https://theses.hal.science/tel-01199523.
Full textThis thesis report deals with the issue of integration of isolated DC-DC converters operating at low power high frequency and high efficiency. To begin with, the particular environment of this converter is presented. This is the field radar avionics power supply, for which electrical, mechanical, EMC specifications are hard. Therefore, this part is a starting point for the converter specifications. The bellowing study details the choice of conversion structure that seems best for both, the environment but also specifications. On the other hand, this paper discusses the feasibility of co-sintering process for the realization of magnetic components. This components. Which are essential to realized such of converter. It follows the selection and implementation of a ferromagnetic ceramic material specific to our application. This step led to the characterization of a model of evolution for magnetic losses tacking into account the magnetic induction amplitude and the operating frequency. The next step is the implementation of a tools of constrained optimization sizing for magnetic components such as transformers and resonance inductors. These elements are composed of our ferromagnetic ceramic suitable for 3MHz as witching frequency. However, one of the most critical points of this study proves to driver of the power switches. The driver requires a development of an original structure without which efficiency for 3MHz converter couldn't exceed 40% to 50%. Several patents results of this structure, as the particular converter regulation mode. In conclusion, this report presents the realized prototype and the very encouraging results that we have been obtained. A critical eye is focused on this functional achieving to open on the prospects for highly integrated co-sintered converter based on this thesis
Haederli, Christoph. "Convertisseurs multiniveaux à bus continu avec point milieu : nouvelles topologies et stratégies de contrôles." Toulouse, INPT, 2008. http://ethesis.inp-toulouse.fr/archive/00001951/.
Full textIn this thesis, a new concept for the representation, the analysis and synthesis of ML (multi level) converters is introduced. This concept allows simple comprehension, comparison and classification of topologies. The family of ML converters with 3 level split DC link supply has been studied more indepth. The converter structures of this family allow for ML output generation while providing good controllability and reasonable components dimensioning. In addition to the known SMC (stacked multi cell converter) and ANPC (active neutral point clamped converter), new topologies are introduced and the functional limitations are studied. Control concepts based on CM (common mode) voltage injection and based on the use of redundant states are introduced. The performance can be significantly improved compered to state of the art control schemes
Garcia, Arregui Marcos. "Theoretical study of a power generation unit based on the hybridization of a fuel cell stack and ultracapacitors : application to the design of an aircraft emergency electrical network." Toulouse, INPT, 2007. http://ethesis.inp-toulouse.fr/archive/00000521/.
Full textThe presented work deals with the design and conception of an electrical network from a fuel cell stack and its associated storage device. The framework of this project is an aeronautical and transport application. Air pressurized fuel cell stacks need some auxiliary devices that permits a correct gas flow through the fuel cell stack. Due to the auxiliary devices, the fuel cell dynamics performances may be limited, and a power buffer is required to support power peaks. Furthermore, hybridization has a positive effect in the system size, and can lead to reduce the global system weight and volume. Ultracapacitos seem to be well adequate for this purpose. Due to the transport application, the system hydrogen consumption, volume, weight and cost are essential parameters. Due to the transport application, the system hydrogen consumption, volume, weight and cost are sizing essential parameters. Therefore a global system optimization seems mandatory in this cas
Elsied, Moataz. "Gestion de l’énergie dans un système multi-sources." Caen, 2015. http://www.theses.fr/2015CAEN2038.
Full textIn this thesis, an advanced energy management system (EMS) model for a typical Microgrid (MG) working in grid and islanded operating modes was introduced, discussed and analyzed. MG model under consideration included FC (Fuel cell), MT (Microturbine), WT (Wind), PV (Photovoltaic), and ESS (Energy storage system). The established EMS was formulated as a nonlinear optimization model with different equality and inequality constraints for proper solution based on the AIMMS (Advanced Integrated Multidimensional Modeling Software), GA (Genetic algorithm) and PSO (Particle swarm optimization algorithm). In addition, a comparative study of DC/DC boost converter topologies was investigated in order to select the best topology to be used for interfacing the DERs to the MG’s DC-bus. Moreover, a new auto-tuning online controller design for the proposed converters was designed based on MLIB/MTRACE (MATLAB-dSPACE Real-Time Interface Libraries). Furthermore, a novel method for controlling the PWM carriers of multiple DC/DC converters interfaced to MG’s DC-BUS was introduced. The main purpose of this method was to minimize the DC-BUS ripples based on optimizing the PWM carriers’ phase shift angle. Finally, an experimental testbed was built in our laboratory to test in a real-time the aforementioned EMS
Ebrahemyan, Masihi Anita. "Conception et mise en œuvre d'un convertisseur DC/DC 4.2V en technologie CMOS 0.18 um." Master's thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/68406.
Full textUsman, Iftikhar Muhammad. "Investigation of DC-DC converter modeling from the perspective of control and input-filter influence." Paris 11, 2008. http://www.theses.fr/2008PA112181.
Full textModeling and control of switched-mode dc-dc converters has occupied a center stage in the field of modern power electronics due to their widespread military and industrial applications. Averaged modeling is most commonly applied as an effective tool to analyze dynamic behavior of a converter and to get physical insights into various dynamical phenomena. Various averaged models have been presented in literature; however, some fundamental questions regarding averaging methodologies still lack satisfactory answers. These unresolved modeling issues are primarily related to their practical validation, inclusion of circuit parasitics and their application to the control-loop design. One of the primary concerns of this thesis is to study and evaluate the performance of averaged modeling of dc-dc converters from control perspective. As far as control is concerned, stability is of prime importance in any voltage regulation system. However, closed-loop stability is not guaranteed if a low-pass filter is present at converter-input. In this thesis small-signal control-to-output transfer functions are used to systematically formulate some design rules to avoid instability using passive damping circuits. To properly investigate the adverse impact of passive damping on conversion efficiency, these damping losses are also quantified in this thesis. Finally, one of the main themes of this dissertation is the development of a control solution for the stability of dc-dc converter in presence of input filter, hence avoiding the use of dissipative damping and thus avoiding undesirable losses
Aboushady, Hassan. "Conception en vue de la réutilisation de convertisseurs analogique-numérique sigma-delta temps-continu mode-courant." Paris 6, 2002. http://www.theses.fr/2002PA066381.
Full textChafi, Ammar. "Conception et réalisation des bobines PCB à base de matériau magnétique souple pour des convertisseurs HF." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I054/document.
Full textThe arrival on the market of GaN power transistors allow to increase the operating frequency of static converters. The direct consequence is the reduction of the dimensions of the passive components which leads to increase the converter power density. Inductors used for storage and filtering of electrical energy are very bulky components and occupy an important place in the converters. One solution for reducing the dimensions of these inductors is to increase the operating frequency of the static converters, made possible thanks to the GaN components. The work of this thesis is about the design and realization of energy storage inductor, made from printed circuit board (PCB) tracks and flexible magnetic materials for high frequency DC-DC converters based on GaN transistors. Flexible magnetic materials marketed in the form of sheets have magnetic characteristics suitable for high frequency applications. Also, they can be cut into different geometric shapes. As part of this thesis, we have proposed a design method for PCB inductors based on flexible materials for high frequency converters. It is based on an algorithm for optimizing the volume of the inductor taking into account the thermal issues of the magnetic material and the parasitic capacitances which appear at high frequencies. The designed inductor is then characterized in order to validate the proposed design tool. The last step is to integrate the obtained inductor in a synchronous Boost converter based on GaN transistors of 1MHz operating frequency to evaluate its electrical and thermal performances. In order to take into account finely the thermal constraints in the design of the inductor, improvements are proposed, based on the results of experimental validation
Andreta, Andre. "Automatic Design for Manufacturing in Power Electronics Based on Power Converter Arrays." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT059.
Full textThis work presents an automatic design method for power electronic converters “Automatic Design for manufacturing” (ADFM). The method proposes to build power converter arrays (PCAs), by assembling standard-cells. The technique is highly inspired by the microelectronics industry, power electronics building blocks, and multicell converters. The power conversion stage of a PCA consists of several conversion standard cells (CSCs) connected in series and/or parallel.One of the primary basis for the proper functioning of the ADFM method is the use of models for predicting the behaviour of the possible assemblies of standard cells. This thesis establishes this base following a three-step procedure: defining a plan of experiments to choose the relevant measurements that bring the most information of the PCAs; building a test bench capable of performing automatic measurements and finally studying statistical modelling methods to perform accurate predictions.Experimental tests in nine different converters are performed, totalizing over 210 hours of tests. Predictions of efficiency and converter temperature made by the models are compared with real measurements to validate their accuracy. Finally, the models are employed for two main tasks: to assure that a given PCA in a given operating point has a safe operation; and to benchmark PCAs that perform similar power conversion
Gabsi, Mohamed Khémis. "Contribution à l'étude de la commutation dans les machines à courant continu associées à des convertisseurs statiques de puissance." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376052918.
Full textAmamra, Sid-Ali. "Conversion statique continu - alternatif multiniveaux : application à la mutualisation d'énergies renouvelables par le réseau de distribution." Versailles-St Quentin en Yvelines, 2013. http://www.theses.fr/2013VERS0063.
Full textA new multilevel converter topology has been proposed in this thesis. The first part deals with harmonics spectrum optimization for a six-level three-phase inverter controlled through pre calculated switching angle. A new selective harmonic elimination method using pulse height modulation PHM strategy has been proposed. Compliance analysis is proposed to demonstrate the conformity to IEEE Std 519-1992 and IEC 61000-3-12 norms. In the second part is devoted to the proposal of a novel six-level converter topology for electrical traction application. A new six-level inverter structure has been proposed and developed, it has twelve power switches. A prototype of the structure was carried out in laboratory-based Semikron 200V MOSFET 120A valves, and controlled through a dSPACE 1103 card. Simulation and experimental validation was achieved through several tests
Lafitte, Fabien. "Étude d'un convertisseur alternatif-continu de 12 kW à faible pollution du réseau : utilisation de la multirésonance, correcteur de facteur de puissance." Le Havre, 1996. http://www.theses.fr/1996LEHA0008.
Full textAjram, Sami. "Nouvelles applications des composants à l'arséniure de gallium dans le domaine de la conversion continu - continu de puissance à ultra-haute fréquence de découpage et haut rendement." Lille 1, 1998. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1998/50376-1998-21.pdf.
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