Tesi sul tema "Électronique de puissance – Fiabilité – Conception assistée par ordinateur"
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Bendali, Mahraz. "Conception multi-niveau multi-physique de systèmes mécatroniques automobiles : prise en compte de la contrainte de fiabilité de convertisseurs de puissance embarqués dans un véhicule hybride/électrique". Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112345/document.
Testo completoThis PhD thesis work is in the context of electric/hybrid vehicle embedded subsystems electrification. In mechatronic design field, the permanent objectives are costs and delays reducing. To achieve this, there is need of design methodologies and appropriate tools to perform a reliable design approach and leave maximum of risks before making the first prototypes. Embedded mechatronic systems mobilize technological brick keys which include the power electronic converter. Their performances are based on the capacity of the design methodologies to consider the environment multi-disciplinary constraints, the adequacy of the technologies, topologies and control laws. This thesis work shows how we can meet these requirements and needs through the development of multi-physics and multi-level design methodology for multi-level converters (interleaved) predisposed to an easy reconfiguration. This methodology, based on optimization under multi-physics constraints allows systematic choice of optimal architecture and component technologies from manufacturer database. It integrates the reliability aspect in the design since the pre-sizing process in the same level as the other constraints (electric, efficiency, thermal, volume, electromagnetic compatibility). In order take advantages of such interleaved converters, the integration of reliability in the design "reliability by design" is completed by the development of fault tolerant control architecture "reliability by control" which increase the availability by reconfiguring hardware or software (control law) of the designed converter
Grandpierron, François. "Design, fabrication and simulation of next generation robust GaN HEMTs for millimeter wave applications". Electronic Thesis or Diss., Université de Lille (2022-....), 2024. http://www.theses.fr/2024ULILN045.
Testo completoIn recent years, significant progress has been achieved with GaN high electron mobility transistors (HEMTs) in advancing the next generation of 5G networks, radar systems, and satellite communications. However, to further enhance power amplification and high-frequency operation (>30 GHz), innovative architectures have been developed. These designs feature reengineered structures, including sub-150 nm gate lengths, thinner barrier layers, or optimized epitaxial layers. Several research groups have demonstrated impressive results, achieving high power-added efficiency (PAE > 50%) with substantial high output power (POUT > 3 W/mm), across frequency ranges from the Ka-band (30 GHz) to the W-band (94 GHz). Despite these advancements, the reliability of short devices remains a significant challenge due to high electric field, self-heating, and electron trapping effects. This research integrates device fabrication, structural and electrical characterizations, and TCAD simulations to provide cutting-edge insights in this field. One of the most promising technologies, the graded AlGaN channel HEMT has been explored through advanced simulations to better understand its unique properties. Furthermore, an optimized buffer architecture using an AlGaN back barrier and an ultra-thin AlN barrier has enabled state-of-the-art power performance at 40 GHz in fabricated devices. Finally, a novel buffer-free architecture featuring an ultra-thin AlGaN barrier has also been investigated, showing promising results that may rival existing technologies. Short-term reliability tests have been conducted to identify key shortcomings and guide future development
Kuo-Peng, Patrick. "Conception assistée par ordinateur des convertisseurs à résonance série non réversibles". Toulouse, INPT, 1993. http://www.theses.fr/1993INPT086H.
Testo completoDellier, Stéphane. "Contributions à la conception des circuits micro-ondes : Outil informatique d'assistance à la conception et méthodologie de conception de drivers pour la génération d'impulsions optiques". Limoges, 2005. http://aurore.unilim.fr/theses/nxfile/default/c32d017d-3934-4e7f-9055-802ab9eb7a0e/blobholder:0/2005LIMO0046.pdf.
Testo completoThis thesis deals with the various aspects of the microwave circuit design, and especially how to implement efficient EDA tools for microwave circuit design without fixing knowledge through monolithic, so as to be able to innovate unceasingly. The two parts of this manuscript concern : - the realization of a MMIC driver in pHEMT GaAs technology at 40 GHz of an electroabsorption modulator on InP for optical pulses generation. A design methodology of the EAM driver was developed, allowing to directly take into account in the phase of ultra high frequency CAD, the optical component and its characteristics. This methodology was applied within the framework of a collaboration with Alcatel-Opto+ to the realization of a MMIC driver at 40 GHZ, in 0. 15 μm GaAs pHEMT technology of OMMIC. This realization made it possible to validate the relevance of methodology used, and made it possible to show the interest of the driver + MEA on InP function for the generation of very short optical pulses with a strong extinction ratio at 40 GHz. - the development of a design assistance tool for microwave circuits. Within the framework of a research programme in collaboration with the French Space Agency, a design assistant of microwave non-linear circuits was developed. The objective is propose to designers, a capable data-processing tool to effectively guide them during each design step and to facilitate them the implementation of suited methods in order to enable them to spend more time on the design problems and the development of innovating solutions
Benchaib, Khadidja. "Modèle facile d'emploi de transistor bipolaire pour la CAO en électronique de puissance". Toulouse, INPT, 1991. http://www.theses.fr/1991INPT007H.
Testo completoFezzani, Djamel. "Système expert pour la conception en électronique de puissance". Toulouse, INPT, 1996. http://www.theses.fr/1996INPT008H.
Testo completoGuena, Arnaud. "Association de méthodes pour la modélisation des conducteurs imprimés multicouches en électronique de puissance". Cachan, Ecole normale supérieure, 2001. http://www.theses.fr/2001DENS0040.
Testo completoReynouard, Norbert. "Construction d'un outil d'aide à la conception destiné à l'optimisation des chaînes d’émission de sonar actif". Lyon, INSA, 1993. http://www.theses.fr/1993ISAL0070.
Testo completoIn order to face the new exigences of active SONAR transmission systems and particularly the decrease of the working frequency added to the array size conservation, a C. A. D. Tool has been built. The objectives were to give the designer the tool to study and to optimize every element of the chain (power supply, power generator, transformer, matching units, cable, electroacoustic array) while considering this last as a whole and integrating the array acoustic interaction effects. In that way, SPICE compatible models have been developped, both at the element leve! and at the component level, with the associated methods for the parameter extraction. The models have been validated by experimentation
Delaforge, Timothé. "Dimensionnement optimal des composants passifs en électronique de puissance, utilisation de méthodes discrètes". Electronic Thesis or Diss., Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT008.
Testo completoInnovation in its whole definition is a way for industrial groups to preserve and create value over competitors on the market. Mainly technologic, innovation is also of use, a new way of using a product or service to answer market or user requirements. This work is an innovation for component design in power electronic systems, both in tools and user customs.Power electronic is subject to same research goals as any modern system, i.e. cost and time to market reduction, efficiency increase in the global energy save world concern and modularity of solution to answer maximum customer needs. Among the multitude of proposed solutions during the last decade, multi-legs and multi-levels converters, new SiC and GaN semiconductors or new control strategies, the choice is cornelian for the designer. The need of tool to help designers in their choices is clearly identified in industry. To answer this problem, this work proposes the implementation of passive component sizing using discrete optimization methods. The choice of accuracy and industrial constraints is done to get already purchasable solution from optimization results to suppliers.In the first part of the PhD dissertation the main optimization algorithms are introduced with the optimization strategies. G2Elab experience and Schneider electric one lead to privileged discrete optimization using stochastic algorithms and libraries of components and materials. In the second part the models for passive components are developed to match stochastic algorithms requirements. Focus is done on magnetics because their sizing is dominant compare to capacitor. The effort is done on losses computation and magnetic behavior of powder alloy and amorphous materials widely used in Schneider Electric applications. With these low loss density materials, the gain on efficiency is achieved on conductors. Thus a new semi-analytic model is developed to overcome standard models issues and to compete with integral or finite element method in terms of accuracy and overcoming them in terms of calculation speed.In the third part, filter modeling approach is introduced for AC/DC, DC/AC and DC/DC converters. This modeling takes into account all working cases of UPS impacting passive components design. Interleaved and coupled solutions are investigated.Finally some examples of developed applications for Schneider Electric are presented. The sizing of passive component using discrete optimization methods are implemented with success. Measures are achieved on prototypes to validate our approach
Gillet, Pierre. "Modèle "distribué" de transistor bipolaire pour la C. A. O. Des circuits en électronique de puissance". Toulouse, INPT, 1995. http://www.theses.fr/1995INPT003H.
Testo completoDelaforge, Timothé. "Dimensionnement optimal des composants passifs en électronique de puissance, utilisation de méthodes discrètes". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT008/document.
Testo completoInnovation in its whole definition is a way for industrial groups to preserve and create value over competitors on the market. Mainly technologic, innovation is also of use, a new way of using a product or service to answer market or user requirements. This work is an innovation for component design in power electronic systems, both in tools and user customs.Power electronic is subject to same research goals as any modern system, i.e. cost and time to market reduction, efficiency increase in the global energy save world concern and modularity of solution to answer maximum customer needs. Among the multitude of proposed solutions during the last decade, multi-legs and multi-levels converters, new SiC and GaN semiconductors or new control strategies, the choice is cornelian for the designer. The need of tool to help designers in their choices is clearly identified in industry. To answer this problem, this work proposes the implementation of passive component sizing using discrete optimization methods. The choice of accuracy and industrial constraints is done to get already purchasable solution from optimization results to suppliers.In the first part of the PhD dissertation the main optimization algorithms are introduced with the optimization strategies. G2Elab experience and Schneider electric one lead to privileged discrete optimization using stochastic algorithms and libraries of components and materials. In the second part the models for passive components are developed to match stochastic algorithms requirements. Focus is done on magnetics because their sizing is dominant compare to capacitor. The effort is done on losses computation and magnetic behavior of powder alloy and amorphous materials widely used in Schneider Electric applications. With these low loss density materials, the gain on efficiency is achieved on conductors. Thus a new semi-analytic model is developed to overcome standard models issues and to compete with integral or finite element method in terms of accuracy and overcoming them in terms of calculation speed.In the third part, filter modeling approach is introduced for AC/DC, DC/AC and DC/DC converters. This modeling takes into account all working cases of UPS impacting passive components design. Interleaved and coupled solutions are investigated.Finally some examples of developed applications for Schneider Electric are presented. The sizing of passive component using discrete optimization methods are implemented with success. Measures are achieved on prototypes to validate our approach
Mehdi, Hassan. "Modélisation Bilatérale de systèmes MIMO pour la simulation de niveau circuit et sous système, application à la fonction amplification de puissance". Limoges, 2010. https://aurore.unilim.fr/theses/nxfile/default/f26f7d4a-e4f9-46b9-89cb-6db11e6c6ed9/blobholder:0/2010LIMO4032.pdf.
Testo completoThis work concerns the behavioural modelisation of MIMO RF systems. The objective is to predict the power amplifier system performance that integrates into sub-"passive circuits" in which they are presented in S-parameters. This approach is based on Vector Fitting technique permits the effective rational approximation of frequency data. The first application concerns the equivalent synthesis of a sub passive circuit described from [S] parameters and simulated using simple R, L, C elements. This approach allows us to have an alternative solution of the transient envelop convergence problems and to have an access to circuit performances in the presence of real stimulus. The second application concerns the modelisation and implementation of behavioural models in a "Scilab/Scicos" environment, in which, solving an implicit systems becomes a doable task, also, it takes into account the integration of the model nomatter what the number of accesses is. These models permit to implement a power amplifier's topological model in a system environment (Scicos)
Moursy, Yasser Yousry. "Une méthodologie de conception pour l’immunisation des circuits intégrés HV/HT contre les couplages de substrat pour les applications automobiles". Electronic Thesis or Diss., Paris 6, 2016. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2016PA066099.pdf.
Testo completoAutomotive industry is a growing market for smart power integrated circuits (ICs). The smart power ICs miniaturize the electronic systems and improve their functionality for the vehicles. Product robustness and reliability in smart power ICs are vital aspects in automotive applications. However, failures due to substrate noise coupling are still reported in tests after fabrication. The sources of this noise are the injection of majority and minority carriers in the substrate. The majority carriers’ propagation is well modeled, however, the minority carriers’ propagation cannot be modeled by the conventional modeling techniques. In the first part of this work, we explore a new modeling technique proposed by a research group in EPFL. It relies on models that are capable of maintaining the minority carriers’ concentration and gradient. It allows the substrate parasitic extraction taking into account both majority and minority carriers. A CAD tool (AUTOMICS) is developed by our team at UPMC and is used to extract the substrate parasitic network encapsulating the new modeling technique. In the second part of this work, we introduce a new methodology for smart power ICs design and failure analysis using the tool. It focuses on failures due to minority carriers coupling. The proposed methodology is validated on an industrial test case (AUTOCHIP1). This test case was designed in ams and validated by Valeo. This test case suffers from a latch-up problem. This problem is not recognized by conventional simulations. Using our methodology, we manage to reproduce the behavior in simulation environment. The third part of this work presents system and circuit level design for a DC-DC buck converter. This system is considered as a complex system to validate our proposed methodology. The circuit was fabricated using 0.35 µm HVCMOS technology. The high voltage switches serve as aggressors injecting minority carriers in the substrate. An analog sensitive circuit, which is the bandgap, is considered as a victim. The effect of the substrate coupling is studied and simulation results show acceptable consistency with the measurements
Moursy, Yasser Yousry. "Une méthodologie de conception pour l’immunisation des circuits intégrés HV/HT contre les couplages de substrat pour les applications automobiles". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066099/document.
Testo completoAutomotive industry is a growing market for smart power integrated circuits (ICs). The smart power ICs miniaturize the electronic systems and improve their functionality for the vehicles. Product robustness and reliability in smart power ICs are vital aspects in automotive applications. However, failures due to substrate noise coupling are still reported in tests after fabrication. The sources of this noise are the injection of majority and minority carriers in the substrate. The majority carriers’ propagation is well modeled, however, the minority carriers’ propagation cannot be modeled by the conventional modeling techniques. In the first part of this work, we explore a new modeling technique proposed by a research group in EPFL. It relies on models that are capable of maintaining the minority carriers’ concentration and gradient. It allows the substrate parasitic extraction taking into account both majority and minority carriers. A CAD tool (AUTOMICS) is developed by our team at UPMC and is used to extract the substrate parasitic network encapsulating the new modeling technique. In the second part of this work, we introduce a new methodology for smart power ICs design and failure analysis using the tool. It focuses on failures due to minority carriers coupling. The proposed methodology is validated on an industrial test case (AUTOCHIP1). This test case was designed in ams and validated by Valeo. This test case suffers from a latch-up problem. This problem is not recognized by conventional simulations. Using our methodology, we manage to reproduce the behavior in simulation environment. The third part of this work presents system and circuit level design for a DC-DC buck converter. This system is considered as a complex system to validate our proposed methodology. The circuit was fabricated using 0.35 µm HVCMOS technology. The high voltage switches serve as aggressors injecting minority carriers in the substrate. An analog sensitive circuit, which is the bandgap, is considered as a victim. The effect of the substrate coupling is studied and simulation results show acceptable consistency with the measurements
Thomas, tomasevic Marc veljko. "Etude des couplages substrats dans des circuits mixtes "Smart Power" pour applications automobiles". Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0002/document.
Testo completoSmart Power circuits, used in the automotive industry, are characterized by the integration on one chip of the power parts with low voltage analog and digital parts. Their main weak point comes from the switching of power structures on inductive loads. These inject parasitic currents in the substrate, capable of activating the bipolar parasitic structures inherent in the layout of the circuit, leading to failure or destruction of the integrated circuit.These parasitic structures are not currently integrated into CAD tools nor simulated by SPICE simulators. The extraction of these structures from the layout and their integration into the CAD tools is the objective of the European AUTOMICS project, in which this thesis is carried out.The characterization of the substrate coupling of 2 case study was used to validate theoretical models and compare them to simulations using the new substrate coupling model
Sicre, Mathieu. "Study of the noise aging mechanisms in single-photon avalanche photodiode for time-of-flight imaging". Electronic Thesis or Diss., Lyon, INSA, 2023. http://www.theses.fr/2023ISAL0104.
Testo completoSingle-Photon Avalanche Diode (SPAD) are used for Time-of-Flight (ToF) sensors to determine distance from a target by measuring the travel time of an emitted pulsed signal. These photodetectors work by triggering an avalanche of charge carriers upon photon absorption, resulting in a substantial amplification which can be detected. However, they are subject to spurious triggering by parasitic generated charge carriers, quantified as Dark Count Rate (DCR), which can compromise the accuracy of the measured distance. Therefore, it is crucial to identify and eliminate the potential source of DCR. To tackle this issue, a simulation methodology has been implemented to assess the DCR. This is achieved by simulating the avalanche breakdown probability, integrated with the carrier generation rate from defects. The breakdown probability can be simulated either in a deterministically, based on electric-field streamlines, or stochastically, by means of drift-diffusion simulation of the random carrier path. This methodology allows for the identification of the potential sources of pre-stress DCR by comparing simulation results to experimental data over a wide range of voltage and temperature. To ensure the accuracy of distance range measurements over time, it is necessary to predict the DCR level under various operating conditions. The aforementioned simulation methodology is used to identify the potential sources of post-stress DCR by comparing simulation results to stress experiments that evaluate the principal stress factors, namely temperature, voltage and irradiance. Furthermore, a Monte-Carlo study has been conducted to examine the device-to-device variation along stress duration. For an accurate Hot-Carrier Degradation (HCD) kinetics model, it is essential to consider not only the carrier energy distribution function but also the distribution of Si−H bond dissociation energy distribution at the Si/SiO2 interface. The number of available hot carriers is estimated from the carrier current density according to the carrier energy distribution simulated by means of a full-band Monte-Carlo method. The impact-ionization dissociation probability is employed to model the defect creation process, which exhibits sub-linear time dependence due to the gradual exhaustion of defect precursors. Accurate distance ranging requires distinguishing the signal from ambient noise and the DCR floor, and ensuring the target’s accumulated photon signal dominates over other random noise sources. An analytical formula allows to estimate the maximum distance ranging using the maximum signal strength, ambient noise level, and confidence levels. The impact of DCR can be estimated by considering the target’s reflectance and the ambient light conditions. In a nutshell, this work makes use of a in-depth characterization and simulation methodology to predict DCR in SPAD devices along stress duration, thereby allowing the assessment of its impact on distance range measurements
Hilal, Alaa. "Magnetic components modeling including thermal effects for DC-DC converters virtual prototyping". Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10313/document.
Testo completoThe increasing complexity of power electronic devices requires the intervention of computer-aided design in electrical engineering. Development of electric/electronic systems nowadays is carried out by the help of virtual prototyping, in which simulation software are used to predict components behavior without investing time and money to build physical prototypes. The increasing demand of low power, high efficiency devices forced designers to precisely analyze losses in each component constituting the system. Magnetic components constitute a major part of electronics devices. Therefore accurate modeling of magnetic materials is mandatory in order to predict their realistic behavior under variable operating conditions. Our work takes place in this context by proposing a non-linear dynamic model of magnetic components for use in circuit simulators. It includes the material nonlinear hysteretic and dynamic behaviors with accurate modeling of winding and core losses in addition to thermal effects that are not taken into account by existing models. The model is based on the principle of separation of static and dynamic contributions as well as Bertotti’s theory. VHDL-AMS is used as a modeling language due to its multi-domain modeling feature, allowing coupling with a thermal model. The magnetic component model is implemented in circuit simulation software “Simplorer” It is then tested in a widely used power converter application, the buck converter, to ensure non conventional excitation. The model is validated for different core inductors, different current ripples, different loads, different temperatures and a wide frequency range