Дисертації з теми "Convertisseurs Série"
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Bethoux, Olivier. "Commande et détection de défaillance d'un convertisseur multicellulaire série." Cergy-Pontoise, 2005. http://biblioweb.u-cergy.fr/theses/05CERG0266.pdf.
The present study deals with the control - command for floating voltage series multicell converters. This thesis aims to suggest new control strategies allowing a safe and continuous energy conversion between source and load and with minimum number of sensors. The author shows how to find a control allowing, in one hand the fastest transients and in the other hand optimal steady states. As a matter of fact, prime number cells converters are monitored with full success. This first level loop is thereafter directly driven by sliding mode control algorithms : that way, we show that multicell converter is the ideal power interface to implement sliding modes (first or higher order) without any modulation. After this study, the author intends to remove inner voltage sensors. Therefore, he develops a sliding mode observer which garantees converter safe working whatever the load is. A one cell failure is thereafter taken into account. The previous observer is then modified to detect the failure in real time in order to reconfigure the converter properly
Kuo-Peng, Patrick. "Conception assistée par ordinateur des convertisseurs à résonance série non réversibles." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT086H.
Tachon, Olivier. "Commande découplante linéaire des convertisseurs multicellulaires série : modélisation, synthèse et expérimentation." Toulouse, INPT, 1998. http://www.theses.fr/1998INPT008H.
Benmansour, Khelifa. "Réalisation d'un banc d'essai pour la commande et l'observation des convertisseurs multicellulaires série : approche hybride." Cergy-Pontoise, 2009. http://biblioweb.u-cergy.fr/theses/09CERG0403.pdf.
The goal of this work is to build a benchmark for control and observation of multicellular converters series using the tools and theories of hybrid systems. The most important contributions of this work are: implementation of an experimental benchmark, using the hybrid approach to model the converter for the purpose of demonstrating the feasibility of this approach by establishing a hybrid automaton with different modes in order to represent the converter, apply high order sliding mode control theory to control a chopper multicellular combined with a RL load and then with a brushed DC motor, study the observability and synthesize observers for intermediate voltages by using the recent proposed theory of 'Z (TN) observability' for the converter from hybrid point of view. Observation strategies for intermediate voltages of the converter are studied: adaptive observer, step by step sliding mode observer and high order sliding mode observer (super twisting algorithm). All methods of control and observation presented in this dissertation have been experimentally validated through the benchmark which we have built
Prisse, Lucien. "Étude, conception et mise en oeuvre de convertisseurs multicellulaires série à IGBT." Toulouse, INPT, 1995. http://www.theses.fr/1995INPT129H.
Carrere, Philippe. "Étude et réalisation des convertisseurs multicellulaires série à IGTB : équilibrage des condensateurs flottants." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT125H.
Gateau, Guillaume. "Contribution à la commande des convertisseurs statiques multicellulaires série : commande non linéaire et commande floue." Toulouse, INPT, 1997. http://www.theses.fr/1997INPT100H.
This work deals with multicells converters control. This new static power converter structure appeared at the end of the 90's and has many interesting advantages for high voltage energy conversion. But the perfect dynamic control of the internal variables is an important objective for industrials applications. The first part of this work will be devoted to the study of the multicell structure, with its high interest in energy conversion. An average state space model of the system is given. Different classical non linear control lows are presented in the second part, in order to fit some specific dynamic requirements, very particular to this type of power converter. Thus two methods based on the input / output linearization and on the Lyapunov functions are implemented and tested. Moreover, an original estimator for the different voltages is proposed. In the third part, two differents types of Fuzzy Control of multicells converter are proposed. The first one is based on the average model and leads to classical structure and performances. The second allows the control of the converter through phase shifts variations between the differents trigger signals, but requires a fuzzy inversion of the harmonic model. Simulations results are provided for all the differents control laws on 3 or 4 cells converters. Most of them were implemented and tested through experiments
Solano, Saenz Eduard Hernando. "Étude des convertisseurs multicellulaires série - parallèle et de leurs stratégies de commande, approches linéaire et prédictive." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/13939/1/solano.pdf.
Collomb, Christine. "Modélisation et commande du convertisseur à résonance série non réversible commandé en fréquence." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT047H.
Frey, David. "Convertisseurs haute tension : Contribution à l'intégration de la fonction interrupteur." Phd thesis, Grenoble INPG, 2003. http://tel.archives-ouvertes.fr/tel-00407754.
Souesme, Bruno. "Contribution à l'étude des lois de commande et du comportement dynamique du convertisseur à résonance série non réversible : commande optimale." Toulouse, INPT, 1990. http://www.theses.fr/1990INPT082H.
Guidini, Rodolphe. "Interrupteurs rapides haute tension réalisés par mise en série de composants semi-conducteurs pour convertisseurs de forte énergie." Montpellier 2, 1995. http://www.theses.fr/1995MON20008.
Djondiné, Philippe. "Étude des comportements chaotiques dans les convertisseurs statiques." Thesis, Cergy-Pontoise, 2015. http://www.theses.fr/2015CERG0768/document.
This thesis deals with the analysis of chaotic behaviors in serial multicellularconverters. These switching systems can have a variety of complex phenomenaassociated with bifurcations and chaos. Knowing that a power converter that has a purely dissipative load cannot generate chaotic behavior, we've in the first part of this thesis, we connected a two-cell chopper to a nonlinear load not strictly dissipative and we've analyzed its behaviors by using some basic dynamic properties and thus presented the routes to chaos. The end of this part was devoted to the study of the 5-cell chopper which is a generalization of the two-cell chopper. In order to eliminate the chaotic behavior, the second part was devoted to the synthesis of a controlled law based on hybrid modeling of Petri nets for the regulation of capacitor voltages and current load
Dos, santos moraes Tiago José. "Conception d'entrainement multimachines multi-convertisseurs à haut niveau de fiabilité fonctionnelle." Thesis, Paris, ENSAM, 2017. http://www.theses.fr/2017ENAM0026/document.
In airplanes and launch vehicles, hydraulics, mechanical and pneumatic systems are progressively being replaced by electric systems for technical and industrial reasons. However, these new electric systems have to take into account the economical and weight reliability constraints of the aeronautics industry, ensuring the required reliability. Therefore, novel high reliability multi-machine and multi-converter topologies are compared to standard structures looking forward to find solutions that can be industrially implemented. Then, series-coupled machine topologies were chosen for this work. The series-coupling mutualizes the inverter legs, reducing their number, and increases the total electrical resistance of the system. As a consequence, the peak-current after the occurrence of certain faults is reduced, but the total copper losses are higher. In order to independently control the series-coupled machines, it is highlighted the reason why the number of phases must be higher than 3 and with a special electric coupling that permutes the machine’s phases. A new patented topology is deeply analyzed with experimental tests. After a validation of the studied system, more complex control strategies and control reconfiguration after a fault are also implemented in order to evaluate the potential improvements on the system performance in degraded mode. Simulation and experimental results were used on this study. For this analysis the dimensioning power of the inverter, the copper losses and the torque ripple, all of them in degraded mode, are the compared criterions
Boyer, Michel. "Étude et réalisation d'un ASIC dédié à la commande des convertisseurs à résonance série non réversibles : commande par trajectoire optimale." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT074H.
Hembert, Francky. "Etude et réalisation d'un filtre actif monophasé à structure multiniveaux obtenue par mise en série de ponts à quatre interrupteurs." Lille 1, 1996. http://www.theses.fr/1996LIL10196.
Guennegues, Virginie. "Contribution l'étude des convertisseurs multiniveaux destinés aux applications moteurs rapides." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL094N/document.
This PhD thesis deals with multilevel inverters dedicated to high speed motors applications, used in Oil \& Gas applications. The main objective is to study a topology which enables reducing switching losses, in comparison with the conventional 3-level NPC (Neutral Point Clamped) topology. Moreover, the inverter has to provide motor input signals with a low harmonic distortion level, not to create undesired additional heating in the motor. After a study of the existing topologies, the 3-level NPP (Neutral Point Piloted) topology is chosen regarding all its benefits. Indeed, thanks to series connection of semi-conductor components, switching losses can be divided by two compared to homologous components on the NPC topology. After having compared NPC and NPP topologies in terms of waveforms and losses distribution in components, the author interest is the experimental validation of this topology. The performances reached by the NPP inverter are interesting because it enables to switch two times faster than for a NPC topology for a given current or to switch a higher current for a given switching frequency. The switching schemes of the NPP leg are studied to understand the gain obtained on this topology. In spite of the fact that switching frequency can be doubled on the NPP topology, the sinus filter can not be avoided in order to respect harmonic specification on the motor. A sinus filter with coupled inductances is introduced so that to responds the different sizing criteria
Bou, Nader Wissam. "Méthodologie de choix et d'optimisation de convertisseurs d'énergie pour les applications chaînes de traction automobile." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM047.
Significant research efforts have been invested in the automotive industry on alternative fuels and new hybrid electric powertrain in attempt to reduce carbon emissions from passenger cars. Fuel consumption of these hybrid powertrains strongly relies on the energy converter performance, the vehicle energetic needs, as well as on the energy management strategy deployed on-board. This thesis investigates the potential of new energy converters as substitute of actual internal combustion engine in automotive powertrain applications. Gas turbine systems is identified as potential energy converter for series hybrid electric vehicle (SHEV), as it offers many automotive intrinsic benefits such as multi-fuel capability, compactness, reduced number of moving parts, reduced noise and vibrations among others. An exergo-technological explicit analysis is conducted to identify the realistic GT-system thermodynamic configurations. A pre-design study have been carried out to identify the power to weight ratios of those systems. A SHEV model is developed and powertrain components are sized considering vehicle performance criteria. Energy consumption simulations are performed on the worldwide-harmonized light vehicles test cycle (WLTC), which account for the vehicle electric and thermal energy needs in addition to mechanical energy needs, using an innovative bi-level optimization method as energy management strategy. The intercooled regenerative reheat gas turbine (IRReGT) cycle is prioritized, offering higher efficiency and power density as well as reduced fuel consumption compared to the other investigated GT-systems. Also a dynamic model was developed and simulations were performed to account for the over fuel consumption during start-up transitory phases. Tests were also performed on some subsystems of the identified IRReGT-system. Results show improved fuel consumption with the IRReGT as auxiliary power unit (APU) compared to ICE. Consequently, the selected IRReGT-system presents a potential for implementation on futur SHEVs
Siangsanoh, Apinya. "Conception et contrôle d'un système de gestion de piles à combustible avec des éléments de stockage distribués à supercondensateurs." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0118.
A fuel cell is a device that directly converts the chemical energy of fuel (H₂) to electricity through two electrochemical reactions. It consists of two electrodes (anode and cathode), two bipolar plates, gas diffusion layers, and an electrolyte. For Proton Exchange Membrane Fuel Cell (PEMFC), the electrolyte is a polymer membrane allowing protons transport from the anode to the cathode. It is sandwiched between two catalyst layers to form the Membrane Electrode Assembly (MEA). Gas diffusion layers (GDL) allow the diffusion of hydrogen and oxygen from the channels machined in the bipolar plates to the catalyst layers. At the anode side, hydrogen splits into protons and electrons (hydrogen oxidation). Protons cross the membrane, and the electrons go from the anode to the cathode through the GDL and through an external circuit connected to the load. At the cathode, oxygen molecules react with electrons and protons to produce water (oxygen reduction reaction). Many factors affect the fuel cell performances such as materials, design, and operating conditions. Gas supply to the electrodes is one of the main operating parameters and it is strongly linked to water and thermal managements. Due to its high time response, gas flow also has a major influence on the fuel cell behavior during high frequency power variations, and gas starvation is one of the main mechanisms related to fuel cell degradations.As durability of PEMFC has a key role in the acceptance of it as a feasible power source, the objective of the thesis is to develop a fuel cell power source in order to reach better performances and to decrease the degradations related to the dynamic operations. The new power electronic architecture is based on a modular configuration in which the global fuel cell source is separated into several stacks each being composed with few cells.Each stack is connected to its own converter to form a modular system, and the output of several modular systems is connected in series to supply energy to the load. This configuration is expected to give better reliability and durability performance compared with the configurations involving a single converter. Since the power dynamics of the fuel cell is low, hybridization with a rapid power response storage device, such as supercapacitor (SC) is necessary for the high bandwidth load. In order to increase the efficiency of the global system and to allow an optimal utilization of SC, a serial topology for hybridization is proposed in this study, where isolated converter is placed in series between the fuel cell and SC. This hybridization is applied at the modular level, the SC being distributed into all modular hybrid system. The voltage across the series converter has to be controlled so that the energy transfer from the fuel cell to supercapacitor occurs smoothly. All the SC will supply energy to the load through an adapted DC/DC converter specially design to own power flow freedom degree which is a requirement for implementing a Fuel Cell Management system. The proposed system is validated through the simulation and experimental results
Vidales, Luna Benjamin. "Architecture de convertisseur intégrant une détection de défauts d'arcs électriques appliquée au sources d'énergie continues d'origine photovoltaïques." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0040.
In this research work, the development of a multilevel inverter for PV applications is presented. The PV inverter, has two stages one DC/DC converter and one DC/AC inverter, and is capable of generating an AC multilevel output of nine levels, it's a transformerless inverter and uses a reduced number of components compared to other topologies. The conception of a novel DC/DC converter is capable of generating two isolated DC voltage levels needed to feed the DC/AC stage. This DC/DC stage is developed in two variants, buck and boost, the _rst to perform the reduction of voltage when the DC bus is too high, and second to increase the voltage when the DC bus is too low to perform interconnection with the grid through the DC/AC inverter. This is achieved thanks to the parallel functioning of the developed topology, which make use of moderated duty cycles, that reduces the stress in the passive and switching components, reducing potential losses. The validation of the PV inverter is performed in simulation and experimental scenarios. In the other hand, the response of the inverter facing an arc fault in the DC bus is studied by performing a series of tests where the fault is generated in strategic points of the DC side, this is possible thanks to the design and construction of an arc fault generator based in the specifications of the UL1699B norm. During the tests is observed that with the apparition of an arc fault, there is a lost in the half-wave symmetry of the AC multilevel output voltage waveform, generating even harmonics which aren't present during normal operation, only when an arc fault is present in the DC system. The monitoring of even harmonics set the direction for developing the detection technique. Since the magnitude of even harmonics in the inverter is very low, the total even harmonic distortion is employed as a base for the detection technique presented in this thesis. The effectiveness of this method is verified with a series of tests performed with different loads
Van, Gorp Jérémy. "Diagnostic et observation d'une classe de systèmes dynamiques hybrides. Application au convertisseur multicellulaire série." Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2013. http://tel.archives-ouvertes.fr/tel-00933659.
Bensaid, Rédha. "Observateurs des tensions aux bornes des capacités flottantes pour les convertisseurs multicellulaires séries." Toulouse, INPT, 2001. http://www.theses.fr/2001INPT013H.
Bellahnid, Abderrahim. "Étude et implantation d'une stratégie de commande, à angle de conduction constant du transistor d'un convertisseur à résonance série." Thèse, Université du Québec à Trois-Rivières, 1988. http://depot-e.uqtr.ca/5490/1/000574366.pdf.
Leredde, Alexandre. "Etude, Commande et Mise en Oeuvre de Nouvelles Structures Multiniveaux." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2011. http://tel.archives-ouvertes.fr/tel-00668376.
Kateb, Hocine. "Modélisation par séries de Fourier du fonctionnement en régime permanent d'un ensemble machine asynchrone sans fer convertisseur." Paris 6, 1987. http://www.theses.fr/1987PA066074.
Gastaldi, Matthieu. "Développement d'une solution Core-chip MMIC avec convertisseur série-parallèle intégré en technologie BiCMOS pour la formation des faisceaux pour antennes agiles." Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0046/document.
This R&T CNES project concerns the design and realization of a Core-chip MMIC system integrated in SiGe BiCMOS technology. The MMIC core-chip system is dedicated to the beamforming for the active satellite antenna. The new solutions for the satellite payloads being developed for telecommunication applications need an increased flexibility at all the levels. More precisely, the system of active antennas allowing an adjustment by real-time electronic command of the terrestrial covered area offers an optimized response for the communication link budget. This performance has a cost: the necessity of a very large number of RF control points "amplitude / phase" of the beamforming equipment which power the active antenna matrix elements. So, it becomes mandatory to bring a new solution to optimize this function. The main challenges are: increasing the functions integration, decreasing the DC power consumption and keeping the RF performances in terms of gain, resolution and linearity
Guepratte, Kevin. "Onduleur triphasé à structure innovante pour application aéronautique." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00647128.
Leredde, Alexandre. "Etude, commande et mise en œuvre de nouvelles structures multiniveaux." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0094/document.
This PhD Thesis deals with the study of new multilevel structures. At the beginning of this work, a new methodology to create new multilevel structures has been conceived. To evaluate the performances of these structures, there are many possibilities: number of output voltage levels, number of components, and the quality of the converters’ output waveforms. The list of criteria is not exhaustive. One technique to obtain an output multilevel waveform is to split the DC link in several capacitors. There is a limitation since putting more than two capacitors in serial connection leads to an unbalancing of these voltage capacitors. Several solutions are possible to balance these voltages. The first one uses the control of the structure in a three phase application, using a space vector modulation and minimizing the energy stored in the DC link. The second solution consists in using auxiliary circuits, which realize an energy transfer between one capacitor to another through an inductor. The drawback of this method is the high number of components. This problem can be reduced sharing some components between the three phases of the converter. The third part of this study is related to multicell converters, structures with very interesting good properties. New converter structures mix serial and parallel multicell converters, to obtain a hybrid converter with similar performances to the two basic converters. An experimental prototype was built to validate the results of the PhD. The digital control of this hybrid structure was made with a FPGA where two DSP processors were implemented
Chaffaï, Rachid. "Étude en régime permanent et modélisation en petit signal d'un convertisseur à resonance sérié : application : interface entre les panneaux solaires et le réseau électrique de distribution." Thèse, Université du Québec à Trois-Rivières, 1990. http://depot-e.uqtr.ca/5397/1/000589279.pdf.
Pascal, Jean-Pierre. "Etude de circuits d'aide à la commutation de thyristors GTO montés en série pour des applications à la traction ferroviaire." Paris 6, 1986. http://www.theses.fr/1986PA066273.
Douzi, Chawki. "Effet du vieillissement par fatigue électrothermique sur la compatibilité électromagnétique des composants de puissance à base de SiC." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR002/document.
This research work focuses on the electrothermal aging effect on the electromagnetic compatibility of power components based on silicon carbide SiC. It focuses on two major parts ; an experimental part and another more oriented modelization. Experimentally, this thesis studies the aging effect of SiC transistors used in static converters on the electromagnetic interferences EMI generated by these converters. The second part deals with the modeling of these transistors in order to emulate the effect of their aging on the EMI of the modules they compose. This step made it possible to validate the methodology developed for the simulation of the conducted EMI of a healthy SiC MOFSET at first and of an aged SiC MOSFET in a second time. Overall, this innovative modeling approach developed in this work helps the designers of static converters to predict the conducted EMI before and after aging without going through the measurement. This provides additional information on the evolution of the EMC signatures of such modules during its lifetime and thus to estimate the risk associated with the aging of the components
Amet, Leonardo. "Commande des systèmes à commutation : applications aux systèmes électriques." Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0720/document.
In this thesis , conducted in the context of a grant CIFRE between laboratory ECS-Lab and the company GS Maintenance, we focused on the control and observation of electrical systems, particularly multicellular converter series and the series DC motor.The floating voltages of the multicell topology need to be balanced to specific values. PWM control techniques provide such a balance but favor the slow dynamics. Moreover, if the numbers of cells is not prime, there exist duty-cycles which could destabilize the converter. To overcome these drawbacks, we propose direct control strategies based on sliding mode techniques for 2 and 3-cell converters. These are simple, allow fast dynamics, and can be easily extended to any number of cell with little overhead. They have been tested in simulation and experimentally via a real-time dSpace board on a 2 and 3-cell converter develloped during this thesis at ECS-Lab. It is important to emphasize that an industrial version of the converter has been manufactured at GS Maintenance and sold to Qatar University.Moreover, in the context of the appication of multicell converters, a Zig-Zag sliding mode control law has been proposed to overcome quantization and saturation problems found in real actuators.The second part of this work adresses the synthetization of an super-twistign observer/estimator scheme to estimate the speed of a sensorless DC series motor. The proposed observation strategy is dedicated to an industrial application in the context of oil drilling. It provides a solution to the problem of observation generated by operating at zero or low current. This strategy has been tested on an experimental bench developed in this thesis within GS Maintenance
Moosavi, Anchehpoli Seyed Saeid. "Analysis and diagnosis of faults in the PMSM drivetrains for series hybrid electrical vehicles (SHEVs)." Thesis, Belfort-Montbéliard, 2013. http://www.theses.fr/2013BELF0224/document.
The interest in the electric vehicles rose recently due both to environmental questions and to energetic dependence of the contemporary society. Accordingly, it is necessary to study and implement in these vehicle fault diagnosis systems which enable them to be more reliable and safe enhancing its sustainability. In this work after a review on problem of faults in the drivetrain of series hybrid electric vehicles (SHEV), a deep investigation on fault diagnosis of AC-DC power converter and permanent magnet synchronous motor (PMSM) have been done as two important parts of traction chains in SHEVs. In other major part of this work, four types of faults (stator winding inter turn short circuit, demagnetization, eccentricity ant bearing faults) of a PMSM have been studied. Inter turn short circuit of stator winding of PMSM in different speeds and loads has been considered to identify fault feature in all operation aspects, as it is expected by electric vehicle application. Experimental results aiming short circuits, bearing and eccentricity fault detection has been presented. Analytical and finite element method (FEM) aiming demagnetization fault investigation has been developed. The AC-DC converter switches are generally exposed to the possibility of outbreak open phase faults because of troubles of the switching devices. This work proposes a robust and efficient identification method for data acquisition selection aiming fault analysis and detection. Two new patterns under AC-DC converter failure are identified and presented. To achieve this goal, four different level of switches fault are considered on the basis of both simulation and experimental results. For accuracy needs of the identified pattern for SHEV application, several parameters have been considered namely: capacitor size changes, load and speed variations. On the basis of the developed fault sensitive models above, an ANN based fault detection, diagnosis strategy and the related algorithm have been developed to show the way of using the identified patterns in the supervision and the diagnosis of the PMSM drivetrain of SHEVs. ANN method have been used to develop three diagnosis based models for : the vector controlled PMSM under inter turn short circuit, the AC/DC power converter under an open phase fault and also the PMSM under unbalanced voltage caused by open phase DC/AC inverter. These models allow supervising the main components of the PMSM drivetrains used to propel the SHEV. The ANN advantages of ability to include a lot of data mad possible to classify the faults in terms of their type and severity. This allows estimating the performance degree of that drivetrains during faulty conditions through the parameter state of health (SOH). The latter can be used in a global control strategy of PMSM control in degraded mode in which the control is auto-adjusted when a defect occurs on the system. The goal is to ensure a continuity of service of the SHEV in faulty conditions to improve its reliability
Alkayal, Fisal. "Contribution à l'intégration monolithique de protections contre les surtensions :application aux convertisseurs de puissance haute tension." Phd thesis, 2005. http://tel.archives-ouvertes.fr/tel-00165398.
dissipative est monolithiquement intégrée dans la même puce du transistor à protéger avec aucune modification
technologique additionnelle. Cette intégration monolithique tire profit du système de refroidissement du
transistor à protéger pour le refroidissement de la partie intégrée. En même temps, elle réduit au minimum les
problèmes de connections entre le transistor à protéger et son système de protection. En plus, la conception de
ce circuit de protection permet d'ajuster le seuil de tension de protection. C'est utile pour la mise en série des
transistors pour des applications à haute tension. Un modèle du BJT comme transistor de protection est établi.
Ce modèle se distingue des modèles existants car il prend en compte que le BJT fonctionne en mode linéaire.
Un modèle thermique de l'ensemble des transistors intégrés évalue le comportement de ces transistors malgré la
différence entre leur mode de fonctionnement. Ce modèle donne une meilleure distribution des cellules du
transistor de protection dans la puce. Des résultats pratiques à partir des composants MOSFETs autoprotégés
que nous avons fabriqués valident la solution proposée. Un démonstrateur de hacheur série utilisant deux
MOSFETs autoprotégés en série montre l'efficacité de notre solution.