Dissertations / Theses on the topic 'Facteur puissance'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Facteur puissance.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Rabaste, Denis. "Modélisation des prérégulateurs à haut facteur de puissance." Montpellier 2, 1993. http://www.theses.fr/1993MON20247.
Full textFauvette, Xavier. "Chargeur de batteries embarque à facteur de puissance quasi unitaire." Lille 1, 1994. http://www.theses.fr/1994LIL10120.
Full textHouénagnon, Atègbo Michel. "Étude, calcul et simulation d'un correcteur triphasé de facteur de puissance." Thèse, Université du Québec à Trois-Rivières, 1997. http://depot-e.uqtr.ca/4892/1/000631158.pdf.
Full textLe, Bunetel Jean-Charles. "Étude et réalisation d'un correcteur de facteur de puissance monophase de forte puissance utilisant le concept d'unités complémentaires réparties." Le Havre, 1997. http://www.theses.fr/1997LEHA0010.
Full textEssadaoui, Jamila. "Commande d'un onduleur de puissance destiné au chauffage par induction par la modulation de densité d'impulsion avec amélioration du facteur de puissance /." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 2003. http://www.uqtr.ca/biblio/notice/resume/17800863R.html.
Full textEssadaoui, Jamila. "Commande d'un onduleur de puissance destiné au chauffage par induction par la modulation de densité d'impulsion avec amélioration du facteur de puissance." Thèse, Université du Québec à Trois-Rivières, 2003. http://depot-e.uqtr.ca/4535/1/000105149.pdf.
Full textBANUELOS, SANCHEZ PEDRO. "Contribution a l'elaboration de concepts nouveaux concernant les correcteurs de facteur de puissance triphases." Paris 6, 2001. http://www.theses.fr/2001PA066012.
Full textMaçbahi, 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.
Full textGrbovic, Petar J. "Dispositif correcteur de facteur de puissance à base de super-condensateur pour variateur de vitesse." Phd thesis, Ecole Centrale de Lille, 2010. http://tel.archives-ouvertes.fr/tel-00585405.
Full textGrbovic, Petar. "Dispositif correcteur de facteur de puissance à base de super-condensateur pour variateur de vitesse." Thesis, Ecole centrale de Lille, 2010. http://www.theses.fr/2010ECLI0009/document.
Full textModern controlled electric drives are exclusively based on three-phase motors that are fed from three-phase pulse width modulated (PWM) inverters. Most of modern controlled electric drive applications, such as lifts, cranes and tooling machines are characterized by high ratio of the peak to average power, and high demand for braking at the rated power. In ordinary drives, the braking energy, which represents 30-50% of the consumed energy, is dissipated on a braking resistor. Apart from the “energetic” issue, the mains interruption and degradation, the input current quality and the load fluctuation are additional issues to be addressed and solved.The ultra-capacitor dedicated for power conversion applications has been discussed. In comparison to electrochemical batteries, the ultra-capacitors have higher power density and efficiency, longer life time and greater cycling capability. This makes the ultra-capacitor an excellent candidate for power conversion applications.A new electric drive converter equipped with the ultra-capacitor is presented in the dissertation. The ultra-capacitor with an inter-connection dc-dc converter is used to store and recover the drive braking energy. Moreover, the dc-dc converter controls the rectifier current and the dc bus voltage. The drive input current THD is reduced to 30%. The dc bus voltage is boosted and controlled constant and ripple free regardless on the load and the mains voltage variation. Moreover, the drive input peak power can be smoothed. The presented solution is theoretically analysed and verified by set of simulations and experiments. The results are presented and discussed
Bouatit, Adel. "Conception d'un redresseur triphasé à faible taux de distorsion harmonique et à facteur de puissance élevé." Thèse, Université du Québec à Trois-Rivières, 2012. http://depot-e.uqtr.ca/4416/1/030300595.pdf.
Full textRamirez, David. "Contribution à la modelisation et à la commande des convertisseurs directs : application au prélèvement de courant sinusoidal." Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30107.
Full textOur framework is the study of the sinusoidal current absorption's active techniques in power converters. Our aim is to get some simple average models allowing an accurate representation. These models should be made suitable for the study of the control command. Various methods will be discussed : state space equations averaging, current injection method, and decomposition in series of the state space equations. Two methods will be detailed: The averaging model's method developed by Cuk, the decomposition of differential equations' theory, KBM method. We will analyse the established models with in order to control boost converter. The model's non linearity induced us to estimate comparatively three types of controls: A linear PID control command at the vicinity of an operating point, a state feedback, an optimal switch control. We will discuss the problems linked to the model's non linearity, and then we will develop a combined control law, small and large signals
Fleury, Pascal. "Conception d'une alimentation à haut rendement et à facteur de puissance unitaire basée sur la topologie flyback." Mémoire, École de technologie supérieure, 2005. http://espace.etsmtl.ca/344/1/FLEURY_Pascal.pdf.
Full textFleury, Pascal. "Conception d'une alimentation à haut rendement et à facteur de puissance unitaire basée sur la topologie flyback /." Montréal : École de technologie supérieure, 2005. http://wwwlib.umi.com/cr/etsmtl/fullcit?pMR06032.
Full text"Mémoire présenté à l'École de technologie supérieure comme exigence partielle à l'obtention de la maîtrise en génie électrique". Bibliogr.: f. [140]-141. Également disponible en version électronique.
Russe, Philippe. "Limitation des perturbations apportées au réseau par le fonctionnement des ensembles gradateurs monophasés-charge résistive." Lille 1, 1985. http://www.theses.fr/1985LIL10096.
Full textNuaymi, Loutfi. "Contributions sur les algorithmes de contrôle de puissance équilibrés dans les réseaux cellulaires." Paris, ENST, 2001. http://www.theses.fr/2001ENST0013.
Full textJORQUERA, HUGO. "Contribution a l'amelioration du facteur de puissance et de la qualite de la tension en sortie des redresseurs." Paris 6, 1999. http://www.theses.fr/1999PA066259.
Full textJaunay, Christophe. "Étude d'une cellule de commutation à interrupteurs bidirectionnels bicommandables : une étape vers le convertisseur direct généralisé." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT057H.
Full textPierfederici, Serge. "Contribution à l'étude de la stabilité de cascade de convertisseurs : application à la correction du facteur de puissance sur le réseau monophase." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL073N.
Full textZabre, Sidkièta. "Amplification non-linéaire d’un multiplex de porteuses modulées à fort facteur de crête." Rennes 1, 2007. http://www.theses.fr/2007REN1S014.
Full textBouafia, Abdelouahab. "Techniques de commande prédictive et floue pour les systèmes électroniques de puissance : application aux redresseurs MLI." Poitiers, 2010. http://www.theses.fr/2010POIT2297.
Full textThis work deals with harmonic elimination in electrical energy distribution networks. In fact, harmonic pollution has become a major field of concern in modern industry. It is usually caused by non linear loads, which draw non sinusoidal current from the network. Current harmonics are mainly caused by static converters, especially diode and thyristor rectifiers, because they have a non linear behaviour and represent the main source of currents harmonics injection. Therefore, some measures must be taken in order to reduce current harmonic distortion caused by this equipment. In this field, the advanced preventive solutions adopted, other than active filters which are curative method, is to substitute the conventional rectifiers with new structures of AC / DC non-polluting converters, which have resistive behaviour towards the network. This research work contributes to the control of PWM rectifier with sinusoidal current absorption. That is why, various control strategies have been developed for this converter in order to obtain an efficient control of the DC bus voltage and nearly sinusoidal input current waveforms. These strategies are based either on direct control of input currents or direct power control (DPC). Moreover, they are combined with advanced controls like approaches with fuzzy logic and predictive control applied to the two preceding methods. Simulations presented in this work are performed with Matlab/SimulinkTM tools, and practical implementation in real time has been done through a system controller board dSPACE 1104
Ordonez, Flores Rafael. "Contribution à l’étude des moyens techniques visant à alléger les contraintes imposées au réseau public à basse tension." Paris 11, 2007. http://www.theses.fr/2007PA112173.
Full textThis work consists of grouping together a three-phase Active Filter and an “uninterruptible power supply” into a single converter. This converter is then capable of reducing electromagnetic perturbations from the main AC supply and also of acting as a Backup Supply. It can adapt itself to any linear or non linear load, balanced or unbalanced. The converter is connected in parallel with the electric grid to impose optimal waveform currents on the main AC supply or to replace it. To implement the AF, the principal task has been to determine the optimal waveform of the supply currents. The objective is to obtain a maximal Power Factor. Since the supply voltages are distorted, the compensation method of "non active" power is used for reaching the maximal PF. The AF then supplies the non active power that the load absorbs. To mitigate failures from the main AC supply, a battery is connected to AF. A solution which allows minimization of the batteries encumbrance is proposed: it sets up a supplementary dc/dc converter which acts as buck/boost converter. The Active Filter – Backup Supply system works then in one of two modes according to the availability of the AC supply: 1) AC supply available, FACH (French name) mode: the AF compensates for the non active power and supplies the energy necessary for the charger (buck converter) to recharge the battery; 2) AC supply unavailable, OSE (French name) mode: the BS supplies sinusoidal voltages to load from the boost converter – battery group. The AF was validated by a 1. 5kVA experimental model and the global AF-BS system by simulation
Bartholomeus, Patrick. "Contribution à l'étude des redresseurs à facteur de puissance quasi-unitaire fonctionnant en mode multiniveaux : application au chargeur de batteries." Lille 1, 1996. http://www.theses.fr/1996LIL10078.
Full textTouya, Gilles. "Contribution à l'étude expérimentale des décharges électriques dans l'eau et des ondes de pression associées. : Réalisation d'un prototype industriel 100kJ pour le traitement de déchets par puissances électriques pulsées." Pau, 2003. http://www.theses.fr/2003PAUU3001.
Full textThe aim of this thesis is to make its contribution to the experimental study of electrical dicharges in water and associated pressure waves. A 100kJ industrial prototype was carried out to treat wastes by electrical pulsed power. The first chapter introduce the pulsed power technology. The second chapter explains the two experimental devices used : the industrial process, and the test board of lower energy, allowing the physical and electrotechnical study of the electrical discharge in water. Experimental results of this study are introduced in the third chapter. Electrical and optical mesures reveal two types of discharges i. E. Subsonic and supersonic discharges. Finally, in the fourth chapter, two applications of the PBT method are presented : the first one concerns the industrial prototype, the second allows to evaluate the efficiency of electrical discharges in water to treat biofilms
Garcia-Canseco, Eloisa del Carmen. "Commande basée sur la dissipativité des systèmes non linéaires : application à la stabilisation et à la compensation du facteur de puissance." Paris 11, 2006. http://www.theses.fr/2006PA112123.
Full textThis dissertation is concerned with the theoretical development of nonlinear control methods for physical systems from a power--based perspective, with application to the stabilization of nonlinear physical systems and power factor compensation of electrical systems. In the first part of the thesis, we deal with the stabilization problem of nonlinear physical systems, putting forth the system's energy and power properties as a new building block for controller design and stability analysis. We revisit the dissipation obstacle of the widely appreciated method of energy balancing and propose some alternatives to overcome this obstacle, which include the proof of passivity for a class of nonlinear incremental models and an extension to general nonlinear systems, of the power shaping methodology originally introduced for electrical circuits. Concerning electric energy processing systems, the main contribution is the proof that a certain cyclo--dissipativity property of the compensated circuit is necessary and sufficient for PF improvement. This important observation suggests an analysis and compensator design framework based on cyclo--dissipativity, which is a natural alternative candidate to replace (standard) dissipativity for applications where we are interested in inducing periodic orbits, instead of stabilizing equilibria
Diallo, Mamadou Lamarana. "Contribution aux techniques dites d'ajout de signal pour la Réduction du Facteur de Crête des signaux OFDM." Thesis, CentraleSupélec, 2016. http://www.theses.fr/2016SUPL0005/document.
Full textOne of the main drawbacks of the OFDM modulation scheme is its high Peak-To-Average Power variation (PAPR) which can induce poor power efficiency at the transmitter amplifier. The digital base band pre-distortion for linearisation of power amplifier and the PAPR mitigation are the most commonly used solution in order to deals with efficiency and linearisation at the high power amplifier. This thesis is focused on the PAPR mitigation solution, and particularly on the adding signal based techniques. The proposed solutions in this report are about improving the Tone Reservation method which is the most popular adding signal based technique for PAPR mitigation, and also the classical clipping method which is the most simple method (in terms of computational complexity) actually
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 textBarberousse, Frédéric. "Caractérisation des dispositifs hyperfréquences : schéma équivalent, facteur de bruit et impédance optimale de bruit." Montpellier 2, 1996. http://www.theses.fr/1996MON20110.
Full textPietranico, Sylvain. "Analyse de matériaux pour la modélisation des mécanismes de défaillance dans les modules électroniques de puissance." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2010. http://tel.archives-ouvertes.fr/tel-00543040.
Full textAbouloifa, Abdelmajid. "Commande de convertisseurs statiques de puissance AC/DC en vue de la correction du facteur de puissance et du pilotage de la charge : développement d'une approche formelle pour la synthèse de régulateurs et l'analyse des performances." Caen, 2008. http://www.theses.fr/2008CAEN2072.
Full textThis thesis deals with switched PWM AC/DC power converters. The interest of this type of converters lies in their high power efficiency and their ability to operate in continuous conduction mode minimizing thus electromagnetic interferences, both conducted and radiated. The control objective is twofold: (i) output signal regulation (output voltage for resistive type load, speed for motor type load); (ii) ensuring a unit power factor (PFC) connection between the converter and the power supply net. The problem is dealt with developing a control strategy involving two regulators in cascade. The inner regulator is designed to make the current absorbed by the converter proportional to the supply net voltage. The reference signal of this regulator is also the control signal of the outer regulator which aims at regulating the system output (voltage or speed). Both regulators are obtained from the nonlinear model of the converter, using different control techniques. The resulting closed-loop system turns out to be nonlinear and time-varying. Using suitable stability and averaging tools, it is formally demonstrated that the control objectives are achieved in the mean with an error that depends on the supply net frequency. The larger the net frequency is the smaller the error.
Park, Sehwan. "Les abus de puissance économique dans les relations commerciales déséquilibrées." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAA013.
Full textCompetition provisions seek to regulate the abuse of economic power in unequal commercial relationships. However, in the process, such provisions should not have the effect of adversely impacting the market or harming the proper functioning of other competition rules. When there exists a significant power disparity between parties, the stronger party can impose unequal conditions on the weaker party, particularly through what is called the "fear factor". During the duration of the contractial relationship, the weaker party will not be able to stand up to the stronger party in fear of the commercial relationship being terminated. This is why oppressive behaviors continue in reality, despite the presence of numerous regulations designed to prevent such behaviors. Law makers have a tendency to react by hastily enacting ad hoc regulations. The adaptability of powerful corporations to circumvent the rules is often overlooked. Ultimately, abuses of economic power can only be regulated on a sustainable basis through the creation of a more balanced and less concentrated market. It is in this context that a truly structural approach should be considered. This analysis compares the principal measures against abuses of economic power employed in France and Korea, which sometimes adopt different responses to similar circumstances
Gloaguen, Cyrille. "Le monde militaire russe : facteur de puissance ou de faiblesse de l'Etat ? : forces armées et industrie de défense dans la géopolitique russe contemporaine." Paris 8, 2006. http://www.theses.fr/2006PA082751.
Full textWith the fall of the Soviet Union, a new Russia, endowed with new borders in her History and with new military forces appeared. The year 1991 also changed the face of the geopolitical order in the post-soviet space. Exit the idealogical conflicts, but however Moscow still conserves a frontal and imperial approach of the international relations and firmly intends to maintain her influence in the nearby foreign countries and thus puts a distance between them, NATO and the United States. What kind of part does Russia give to her military forces and to her industrial and technological defense basis in this new geopolitical context ? Can they bring more power to Russia on the international scene, for which she yearns, or on the contrary, won’t the contradictions, the human and material phenomena, the factors of decline that is striking them, risk undermining the balance of Russia’s young democraty, so as the russian foreign politics ?
Noblecourt, Sylvain. "Conception et réalisation de composants de puissance à superjonction et à tranchées profondes pour des applications 600 V et 1200 V." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30230/document.
Full textNew technological ways allowing the realization of deep trench Superjunction devices (diodes or MOS transistors) with a deep trench termination are investigated. The aim of this work is to propose an alternative to conventional MOSFETs in high voltage range (600 V and above): the major challenge is to find the best trade-off between the two main parameters characteristics of these structures: specific on-resistance / breakdown voltage. We developed a technology based on a single N- epitaxial layer (thus reducing the realization cost) and the use of BCB filled, wide and deep trenches associated to boron doping on the trenches sidewalls. Previous works have demonstrated the feasibility of such junction termination and have led to the fabrication of a 1200 V Deep Trench Termination Diode (DT2-Diode). We chose to validate our termination technology by fabricating a Deep trench Superjunction Diode (DT-SJDiode) for 600 V applications. By means of Sentaurus TCAD 2D-simulations, we have first determined the optimal physical and geometrical parameters leading to a best "Breakdown voltage/on-resistance" trade-off. We presented technological results focusing on the more critical points: the control of deep trenches verticality by Deep Reactive Ion Etching technique, according to the Bosch process, and the trench filling with dielectric. We have studied the influence of SF6 etch and C4F8 passivation times on resulting trench verticality: the best anisotropy for 6 µm wide central trenches and 40 µm wide termination trenches is obtained for the couple SF6 (2 s)/ C4F8 (3.5 s). A thermal oxidation after the etch step allows to reduce the size of the scallops that appear on the trenches sidewalls and characteristics of the Bosch process (alternation of etch and passivation steps): the related peak-to-valley distance is lowered from 100 nm to 50 nm. Finally we have successfully filled deep and wide trenches by optimising the BCB spin-coating parameters, the high viscosity of this material rending difficult its spreading all over the wafer. We found that a dispensing rotation speed down to 100 rpm, an implementation of two 10 min rest steps improve BCB spreading and its flowing along the trenches. The BCB excess removing by reactive ion etching is under study: first encouraging results give an etch rate of 0.75 µm.min-1 with a SF6/02 gas mixture
Reymond, Cédric. "Conception d'une structure innovante de convertisseur AC-DC de type Totem-pole avec correction du facteur de puissance : application aux chargeurs de batteries des véhicules électriques." Thesis, Tours, 2019. http://www.theses.fr/2019TOUR4015.
Full textGovernments empower states over the environment with implementation of solution to clean up the electricity production sources. In 2020, 20% of the produced energy will be generated by renewable energies. However, theses green energies are occasional and require a huge storage capacitance for the local smart grids management. This solution puts two new issues: the necessity of having a bidirectional converter and the inrush currents management. To facilitate the study of these problems, the thesis suggests binding through a power balance, the performances of the current limiter on an innovative topology converter. This analysis highlight an alternative solution of inrush current strategy in energy conversion. Finally, a novel control circuit for SCRs/Triacs components will be proposed and characterized for landing one of the constraints linked to the converter reversibility
Callier, Jacqueline. "La décomposition acido-basique comme facteur limitant de l'exercice musculaire : effets d'une alcalinisation exogène sur la capacité d'endurance a puissance sub-maximale et maximale du sujet sportif." Paris 5, 1991. http://www.theses.fr/1991PA05S018.
Full textSaber, Christelle. "Analysis and optimization of the conducted emissions of an on- board charger for electric vehicles." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLN034/document.
Full textBattery chargers for electric vehicles are classified as on-board or off-board chargers. Off-board chargers are not constrained by size or weight but introduce additional cost to the infrastructure through the deployment of a high number of charging stations. In order to meet the needs of electric vehicle users in terms of charging availability, on-board chargers that achieve ac/dc conversion are retained. Furthermore, on-board chargers are classified as standalone or integrated systems. By reusing parts of the traction power train for charging, the latter reduces the cost of the charger. Disadvantages of integrated systems include electromagnetic compatibility issues and complex control schemes.This work presents the power quality performance analysis and control optimization of an on-board non-galvanically isolated electric vehicle charger integrated to the traction’s power train. In order to be able to evaluate the high frequency conducted common mode emissions (150 kHz - 30MHz) of a power conversion structure, one needs to develop a good current control scheme that establishes a high-quality low frequency behavior (0 - 2 kHz). Therefore, different aspects related to the power factor correction of the single-phase as well as the three-phase charging configurations are studied: the control scheme for the regulation of the charging power, the displacement power factor correction, the suppression of the grid current harmonics and the active damping of the input filter’s resonance. Two experimental test benches are developed using two different technologies (Silicon IGBTs vs. Silicon Carbide Mosfets). Experimental results are provided.This work also presents a comprehensive approach to modeling the CM and the DM EMI behavior of a power electronics structure. This method is applied to the charger in its single-phase and three-phase configurations. The models allow to evaluate the fluctuating internal nodes and to study the effect of various proposed mitigation solutions on the CM emissions. The models are also developed in the intent of being injected into optimization algorithms for the future design of an optimal EMI filter
Franc, Anne-laure. "Lignes de propagation intégrées à fort facteur de qualité en technologie CMOS. Application à la synthèse de circuits passifs millimétriques." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00625474.
Full textMeghriche, Kamal. "Etude et optimisation de convertisseurs DC-AC à commutation pré-calculée, associée à un filtre LC." Versailles-St Quentin en Yvelines, 2006. http://www.theses.fr/2006VERS0017.
Full textThis research work consists to develop both single-phase and three-phase DC–AC converter models so as to determine the switching angles allowing to obtain the best possible harmonic rate for a given number of commutations per period and mean square inverter output voltage. Two inverter models were mainly developed. In the first model, the harmonics filter capacitor sees as bipolar (AC) voltage. In order to increase the threshold level of the capacitor breakdown voltage to equal the mean square inverter output voltage value, another inverter model was developed. This model allows keeping a unipolar voltage across the capacitor while fulfilling the main harmonics distortion reduction objective. As a contribution to the renewable energies development efforts, an application to feed (inject) the energy back to the network, where true power (P) and reactive power (Q) are kept under control, was proposed and tested in simulation. This application could be used for static power factor correction (PFC) as well. A microcontroller-based experimental setup was developed to carry out experimental validation tests of the different simulation results. Apart from static PFC correction, all simulation results were tested and validated experimentally. Despite using a reduced number of commutations, the obtained experimental results show a good quality inverter output voltage. This allows reducing the stressing constraints and switching losses undergone by the inverter power switches
Franc, Anne-Laure. "Lignes de propagation intégrées à fort facteur de qualité en technologie CMOS. Application à la synthèse de circuits passifs millimétriques." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENT039/document.
Full textThis work focuses on high-performance S-CPW (Shielded CoPlanar Waveguide) transmissionlines in classical CMOS integrated technologies for the millimeter-wave frequency band.Thanks to an important slow-wave phenomenon, the physical length of S-CPW decreases by afactor from 1.3 to 3.2 compared with classical transmission lines. Presenting also lowattenuation loss, the developed transmission lines show very high quality factor (higher than 40at 60 GHz). The precise study of the electromagnetism field leads to an electrical model forS-CPWs. This is the first model that takes the losses in this topology into account. Then, somebasic passive circuits designed with S-CPWs and characterized up to 110 GHz are presented invarious CMOS technologies. The low insertion losses and relative low surfaces of a powerdivider and a passband filter show the great interest of S-CPW to integrate compact passivecircuits in classical CMOS technologies at millimeter-wave frequencies
Louët, Yves. "Prise en compte du facteur de crête dans le dimensionnement des systèmes de télécommunications." Habilitation à diriger des recherches, Université Rennes 1, 2010. http://tel.archives-ouvertes.fr/tel-00471891.
Full textHernandez, Michael. "Applications of modern control in power electronics." Paris 11, 2010. http://www.theses.fr/2010PA112161.
Full textIn the first part, this dissertation continues with the framework for analysis and design of (possibly nonlinear) power factor (PF) compensators for electrical systems operating in non-sinusoidal (but periodic) regimes with nonlinear loads. In particular, under the standard assumption that the generator is a voltage source with no impedance, we characterized all nonlinear loads whose PF is improved with a given nonlinear compensator. And this framework is used to study the problem of passive PF compensation of a classical half-bridge controlled rectifier. Given the “phase advance” operation of the rectifier it is expected that capacitive compensation improves PF, it is however less obvious that this can also be achieved (under some suitable conditions) with inductors. In the second part, A methodology to design linear proportional-integral (PI) controllers used in power converter applications and ensuring asymptotic stability was proposed. The technique relied on the basic fact that if an affine system can be rendered passive with a constant control, then it is stabilizable with a PL A structural condition was imposed then on the power converter to satisfy the former property with a passive output generated as a linear combination of the states. This condition is technical and has no clear physical interpretation. This result is extended in three directions : first, the aforementioned condition is removed ; second, a larger class of converters (with switching external sources) is considered ; third, the load resistance is assumed unknown and an adaptive PI controller (with three different estimators) is proposed. The methodology is applied to the problem of power factor compensation of a 3-phase. Voltage source rectifier, with simulation results proposed. Also, a stable adaptive PI is designed for the output voltage regulation of a quadratic boost converter showing the performance by means of experimental result. In the third part some controllers based on the concept of charge control for a converter used in an application of power factor correction are shown. The converter is composed by the interleaved connection of two or more boost converters connected to the grid by means of a non controlled diode rectifier. Charge control represents a cheap solution to guarantee current sharing among the different converters involved, and is normally used in combination with other controllers. The two controllers are first designed to guarantee the power factor close to one with regulated DC voltage, to which charge control is added to distribute equal current among the converters. Finally, a simplification with similar performance is presented that eliminates the use of current sensors, except for the current transformers required to implement the charge control, experimental results complete this part. The fourth part presents the implementation and programming of a method to track the maximum power point (MPP) in photovoltaic (PV) applications. This operation point is of special interest as it is required to extract the maximum power available from the photovoltaic arrays
Sakr, Nadim. "Fast on-board integrated chargers for electric vehicles." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC045.
Full textTo date, the range autonomy of most electric vehicles is still lower than conventional fuel based vehicles and charging times are significantly longer. To overcome this problem, battery capacity could be increased but more importantly high power fast charging should be accessible everywhere.The widespread deployment of public DC fast charging stations is still difficult to achieve. So, in order to have a better spreading of the charge spots and a better coverage, it is also necessary for the vehicle to be charged from an on-board charger that could be plugged into three-phase AC power outlets.Furthermore, because the battery is charged only when the car is parked -except for regeneration at braking-, using the on-board traction system components to form an integrated charging device is possible. This kind of topology is called an integrated charger which allows designing a charger small enough to be embedded in a vehicle at an affordable cost.Several non-isolated on-board integrated charging topologies are proposed in this thesis and the one that best meets some predefined specifications is selected. This topology is studied in details and validated by simulation software. A laboratory prototype is also built to verify the performance of this multi-purpose traction/charger converter
Sauveplane, Jean-Baptiste. "Caractérisation thermomécanique de films métalliques déposés en couche mince pour la simulation de la fiabilité de composants microélectroniques de puissance." Phd thesis, INSA de Toulouse, 2007. http://tel.archives-ouvertes.fr/tel-00158019.
Full textLacressonnière, Fabien. "Conception de structures de conversion d'énergie à double fonctionnalité pour chariots électriques de manutention." Artois, 2005. http://www.theses.fr/2005ARTO0205.
Full textNowadays, in electric industrial trucks, two distinct power converters are used : on the one hand a speed controller and on the other hand a battery charger. The aim of the study is to use the existing components (speed controller) to realize a battery charger in order to reduce the cost and improve performances. To undertake this study, two industrial trucks have been selected : a transpallet with DC motorization and a fork lift truck with AC motorization. After a brief reminder on the technologies and standards to respect (harmonic pollution, galvanic isolation), the choice of the topology was made on the CUK converter with a galvanic isolation for the transpallet and on a P. W. M. Inverter/rectifier for the fork lift truck. A mechanical study for the two industrials trucks has allowed to conclude on the effectiveness from the regenerative braking. In order to analyse the influence of a charging current with a sinusoidal perturbation on the performances of the lead-acid battery, the electrical model has been introduced. For the transpallet, the full analyse (dimensioning, dynamical model, snubber) of the CUK converter has been done. For the fork lift truck, the induction motor is directly coupled at the main wheel and it is used like as a transformer during the charge of the battery. A dimensioning study of the motor has been presented and its interaction with the P. W. M. Inverter/rectifier has been analysed
Mounzer, Ralph. "New tone reservation PAPR reduction techniques for multicarrier systems." Thesis, Rennes, INSA, 2015. http://www.theses.fr/2015ISAR0029/document.
Full textOrthogonal Frequency Division Multiplexing (OFDM) has been adopted by many telecommunication and broadcasting systems for its robustness, high transmission rates, mobility and bandwidth efficiency. However, OFDM signals are characterized by high power fluctuations, measured by the Peak to Average Power Ratio (PAPR), which cause distortions at the output of the non-linear High Power Amplifier (HPA) and prevent the radio frequency designer to feed the signal at the optimal point of the HPA specifications in order to reduce the energy consumption. The second generation of Digital Video Broadcasting (DVB-T2) adopted two PAPR reduction techniques, one of them is Tone Reservation (TR). TR creates a Kernel from a reserved set of subcarriers. The kernel is then iteratively added to the OFDM signal in such a way to reduce its peaks thus reducing its PAPR. In the first part of the thesis, different algorithms offering better performances compared to the DVB-T2 TR solution are proposed. A first group of solutions introduces changes and enhancements to the TR algorithm adopted in DVB-T2 TR but keeps the same kernel definition. This group includes: the Partial Oversampling and Fractional Shifted Kernels (POFSK) technique which is based on a partial oversampling of the signal, the Dynamic Threshold (DT) technique which allows better algorithm convergence by dynamically computing the PAPR reduction threshold for every OFDM symbol, and the Enhanced Peak Selection (EPS) technique which provides additional PAPR reduction by choosing the appropriate signal peaks to reduce and the peaks to skip. The second group of solutions includes the Individual Carrier Multiple Peaks (ICMP) technique which is based on a special kernel definition that changes from one algorithm iteration to another and uses a different phase calculation approach that allows the reduction of multiple peaks at a time. GICMP is an optimized version of ICMP that allows the parallelization of iterations in such a way to reduce the processing delay and the number of algorithm iterations. The simulation results and real hardware platform measurements of the proposed algorithms showed that, compared to the DVB-T2 TR version, the GICMP algorithm allows a Modulation Error Rate – MER gain of up to 2.5 dB or a 10 % reduction in HPA consumed energy with the same performances
Nonnon, Philippe. "Contribution à l'étude d'un redresseur à MLI à perturbations minimales du réseau." Vandoeuvre-les-Nancy, INPL, 1991. http://www.theses.fr/1991INPL005N.
Full textSamozino, Pierre. "Capacités mécaniques des membres inférieurs et mouvements explosifs. Approches théoriques intégratives appliquées au saut vertical." Phd thesis, Université Jean Monnet - Saint-Etienne, 2009. http://tel.archives-ouvertes.fr/tel-00483683.
Full textObame, Ndong Elysée. "Développement d'un dispositif de calorimétrie par rayonnement thermique : application à la mesure des pertes dans les composants électriques." Phd thesis, Université de Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00523756.
Full textRasoanarivo, François Bertin. "Contribution à l'étude et à la réalisation d'alimentations à consommation sinusoïdale et comportement quasi-résistif : filtrage intégré non-contrôlé et contrôlé." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL004N.
Full textTouzani, Youssef. "Commande aléatoire du convertisseur Buck-Boost triphasé à prélèvement sinusoïdal du courant." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2006. http://tel.archives-ouvertes.fr/tel-00693968.
Full text