Дисертації з теми "SYNCHRONUS MACHINE"
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Orciari, Luca. "Rotor position estimation of a bearingless permanent magnet synchronus motor by machine learning techniques." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Знайти повний текст джерелаRekioua, Toufik. "Contribution à la modélisation et à la commande vectorielle des machines synchrones à aimants permanents." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_REKIOUA_T.pdf.
Повний текст джерелаWisniewski, Teodor. "Modélisation non-linéaire des machines synchrones pour l'analyse en régimes transitoires et les études de stabilité." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC092/document.
Повний текст джерелаThe research presented in this thesiswas carried out in the research and developmentproject between Leroy Somer and the Group ofElectrical Engineering of Paris (GeePs). Theirobjective is to simulate the phenomena observedin the transient states of electrical machines.These simulations are particularly oriented bythe new Grid Code requirements for alternatorsconnected to the power network. Two types ofmodels have been principally developed. Thefirst one is based on a magnetic description ofthe machine where each flux is expressed as afunction of the currents flowing through thedifferent machine windings. The second oneregroups the different winding currents by usingthe magnetizing currents on axes d and qassociated to saturation coefficients for eachflux linkage and simplifies the magneticdescription, especially when taking into accountthe damper windings. With a sufficiently precisemodelling of the non-linear magnetic behaviourof the machine, it is possible to better predict thecurrents and the electromagnetic torque underfault conditions such as voltage drops. The workcarried out in this thesis has made possible,starting from the descriptions of the saturationeffects found in a machine, to define methodsfor incorporating saturation into circuit models.Finally, one can make a choice of the dynamicnon-linear model for a given machine. Thanks toshort computation time, it also led to theSimulink integration of the machine andexcitation system models paving the way forstability and control studies
Koteich, Mohamad. "Modélisation et observabilité des machines électriques en vue de la commande sans capteur mécanique." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC043/document.
Повний текст джерелаHigh-performance control of electric drives requires an accurate knowledge of the rotor position and/or speed. These mechanical variables are traditionally measured using sensors, which increases the cost and reduces both the robustness and the reliability of the system. This emphasizes the importance of electric drives control without shaft sensors, often referred to as sensorless control : it consists of replacing sensors with a state observer algorithm, that estimates the desired mechanical variables from currents and voltages sensing and based on the system’s model. Nevertheless, before designing a state observer, the observability ofthe system should be examined, that is, it should be checked whether the states to be estimated can be reconstructed, unambiguously, from the input/output signalsof the system.This work addresses the modeling and the observability analysis of electric drives in the view of mechanical sensors removal. Firstly, electrical machines models areelaborated, and it is shown that a unified modeling of alternating current machines is feasible, for the purpose of designing unified control and estimation strategies.The observability of the machines’ models is next studied in the view of sensorless control. The local instantaneous observability theory is applied, which enables us to formulate physically insightful analytic conditions that can be easily interpreted and tested in real time. The validity of the observability conditions is confirmed by numerical simulations and experimental data, using an extended Kalman observer.This work contributes to novel outlooks on the sensorless alternating current drives and to a deeper understanding of its properties, in order to develop higher performance estimation techniques in the critical operating conditions (mainly at standstill and/or zero-stator-frequency).The concepts introduced throughout this thesis, such as the equivalent flux and the observability vector, with the obtained results, open new horizons in a domainthat seems to become mature enough
Mariani, Guilherme Bueno. "Machine synchrone à réluctance : modèles équivalents à réseau de réluctances pour la simulation et l’optimisation." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT021/document.
Повний текст джерелаThis thesis aims the electromagnetic modeling of synchronous reluctance machines, with a final goal: to obtain a fast and sufficiently accurate model, able to calculate the torque ripple and to be used for optimal machine design and also capable to be coupled to circuit software to test control techniques.A MEC (magnetic equivalent circuit) model was created step-by-step and validated at each step. Final model of the air-gap is based on a function (Fermi-Dirac integral), which has been completely parameterized by machine dimensions. This model of the machine is driven by current; afterwards it was coupled with an electric circuit thanks to a voltage-current transformation interface. The optimizations made with the model allowed to highlight some deficiencies in the initial dimensional constraints. After corrections the model could be efficiently used in an optimization process
Bernot, Alix. "Modélisation et optimisation d'une machine électrique homopolaire en poudre de fer." Thesis, CentraleSupélec, 2015. http://www.theses.fr/2015SUPL0025/document.
Повний текст джерелаThis thesis presents the study of a claw-pole transverse flux electric machine. At first, SMC material properties and transverse flux structures are studied, leading to the choice of a structure combining a claw-pole stator and a permanent magnet rotor. The machine is modelled by the means of a magnetic equivalent circuit, with a reluctance network, developed with the help of finite elements simulation. The model is then changed with the introduction of the hypothesis that the flux is bent inside the airgap; it is then validated by the test of a prototype.The architecture of the machine is optimized after a detailed analysis of the flux circulation, leading to the identification of the tooth-tip saturation issue. After finite element simulation of the improved machine, a prototype is later tested, which confirms the gain brought by the new architecture.An alternative version of the machine, with a field winding attached to the stator and a massive rotor is then proposed. This machine promises to be cost-effective to build and robust thanks to its massive rotor. An analytical model of the machine is introduced, along with a finite element simulation, to end with the test of a prototype which confirms the possibilities of this new concept. An improved version of the machine with a rotor with isolated teeth is finally studied, with an analytical model and a finite element leading to the validation of the interest of this evolution
Hamida, Mohamed Assaad. "Commande robuste sans capteur mécanique de l'actionneur synchrone à pôles saillants." Ecole centrale de Nantes, 2013. http://www.theses.fr/2013ECDN0010.
Повний текст джерелаThanks to its advantages, the permanent magnet synchronous machines become more usual in many fields (avionics, automotive). This thesis deals with the permanent magnet synchronous machine sensorless control design. Two kinds of nonlinear observers were developed, firstly to reconstruct the rotor position and the rotor speed in order to replace the mechanical sensor and secondly to estimate some parameter and disturbance in order to improve the robustness of the sensorless control laws. An adaptive observer and a high order sliding modes observer have been designed using the interconnected observers theory. The second contribution of our research work is to design efficient nonlinear control laws for the salient pole permanent magnet synchronous machine. For this purpose, three control laws have been designed. First,the classical backsteppingcontrol is improved by adding integral actions at each step of its design algorithm. Then, two kind of sliding mode controllers have been designed. Each control law is associated with an observer allowing to replace the mechanical sensors and to improve the robustness with respect to the parameter uncertainties and the load torque. The stability of both controller and observer is proven. The performance of the proposed sensorless control laws are tested through simulations and experiments on specific industrial benchmarks. Significant robustness tests are tested to illustrate the efficiency and the robustness of the proposed methods
Fellah, Mohamed-Karim. "Commande numérique industrielle des convertisseurs à thyristors d'une machine synchrone autopilotée." Vandoeuvre-les-Nancy, INPL, 1991. http://docnum.univ-lorraine.fr/public/INPL_T_1991_FELLAH_M_K.pdf.
Повний текст джерелаOne of the important points of this study, which has been carried out in cooperation with EDF-CEGELEC-CRAN, is the complete realization of an industrial digital control of a self-controlled synchronous machine. This realization is based 0!l a given operation requirements specification especially for firing angle accuracy and variable-frequency following. In the first part of the thesis, phenomena related to the imperfections of power supply network are studied in a certain depth, especially the extraction of the fundamental of a noisy variable-frequency network. This is a specific research on the synchronizing problem. In the second part, we discuss digital firing circuits for thyristors and gate pulse production algorithms. We will give a description and a comparaison of several existing firing algorithms (reference crossing, time delayed, incremental) and then, propose a firing algorithm said hybrid algorithm. Finally, a complete study is made on firing control (from operation requirements specification to its hardware and software realization) of thyristor bridges for a self-controlled synchronous machine. Note that the rapidity of process, the complexity of the interaction between different functions make us, during the realizing procedure, to' follow the design method MAREL (Méthode de conception d'Applications temps Réel pour la commande de processus ELectromécaniques : design method for real time applications in electromechanical process control) developed in CRAN
Colle, Alexandre. "Étude d’une machine supraconductrice à flux axial pour une application aéronautique." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0036.
Повний текст джерелаThe world is electrifying, especially the world of transport. Global warming and air pollution are the cause, which promotes electric power as a solution to the energy transition. Electricity is more and more a factor of decarbonation with renewable energies. Moreover, the use of this energy is efficient. The efficiency of electric motors can be more than 90% compared to 30% for internal combustion engines. If the possibility of transporting a large number of passengers on the ground with electric energy is a reality, it is different in the air. But change is on the way thanks to projects such as Solar Impulse, the famous solar airplane that has circumnavigated the world in several stages. These projects show that the technology is almost ready. The concern for improvement in the aeronautics industry concerns the mass of equipment. For an all-electric aircraft, the storage of electricity and the electromechanical converters must be more efficient than current technologies. Electrical storage is one of the key issues in the energy transition. The solutions are diverse and can be mechanical (flywheel), electrochemical (fuel cell, batteries), electromagnetic (superconducting coils, supercapacitors) or thermal (latent heat). Electric power generation or motorization is the second aspect of the transition. Permanent magnet electric motors currently have the best power-to-weight ratio, also known as power-to-weight. But this is still insufficient, which is why breakthrough technologies are being studied, such as the use of superconducting materials. The objective of this thesis is to study superconducting materials which have the particularity of having no loss when an electric current flow through them. We can therefore quickly see an advantage concerning their integration in electrical machines. They make it possible to increase the magnetic field in the air gap of an electrical machine and to reduce its volume and mass. This is an important research topic of the GREEN laboratory of the University of Lorraine in Nancy with which this thesis was carried out
Nedjar, Boumedyen. "Modélisation basée sur la méthode des réseaux de perméances en vue de l’optimisation de machines synchrones à simple et à double excitation." Thesis, Cachan, Ecole normale supérieure, 2011. http://www.theses.fr/2011DENS0056/document.
Повний текст джерелаThe electric and / or hybrid driveis are an application area growing with a strong restriction in terms of congestion. This prompted the designers to create appropriate structures. Among these topologies, we find the double-excitation synchronous machine (MSDE). These machines can combine the advantages of permanent magnets machine and those of a coils excited machine.The choice of a model for these machines is an important step in the analysis, optimization and pre-sizing. This thesis presents a contribution to the modeling by magnetic equivalent circuit (MEC) of single and double excitation synchronous machines. Three parties are offered as well. The first part of the thesis presents two states of the art: one on the double-excitation synchronous machines and the other on the modeling of electrical machines, mainly in the modeling by magnetic equivalent circuit. In the second part, we discuss the 2D modeling of flux concentration permanent magnet synchronous machine taking into account the rotation and saturation. The purpose of this section is to find ways to combine both computational time and accuracy. We start by using the magnetic equivalent circuit modeling based on a mesh of the structure and each mesh is replaced by two-way reluctances, then a torque estimation are obtened by two methods flux-FMM and Maxwell stress Tensor. The second section presents a coupling between magnetic equivalent circuit and finite element method. The proposed method is to solve the two models (reluctant and finite elements) simultaneously with software EF. The coupling is performed by an equivalence between the geometric dimensions and magnetic properties of materials. The presentation of different models in terms of time-accurate calculation shows the effectiveness of the use of MEC and coupling method compared to FEM. The third part concerns the three-dimensional modeling of double excitation synchronous machines. At first, we present an adaptation of the MEC to the three-dimensional structures. Then we apply this model to the double excitation synchronous machines (DESM). The DESM with flux concentration configuration is presented. To better control the wund flux of excitation, a buried magnet homopolar machine is also studied with the same approach. Model validation is performed by finite element and experimental measurements. In the last part, a comparison between homopolar and bipolar configurations is made, then the rotor flux concentration is optimized in order to compare it to the machine magnets buried
Zhang, YuQi. "ADVANCED SYNCHRONOUS MACHINE MODELING." UKnowledge, 2018. https://uknowledge.uky.edu/ece_etds/118.
Повний текст джерелаChen, Hao. "Modeling and control of a marine current energy conversion system using a doubly salient permanent magnet generator." Nantes, 2014. http://archive.bu.univ-nantes.fr/pollux/show.action?id=83aa318a-2539-4dda-aa76-c57351bf6c09.
Повний текст джерелаSeveral techniques to extract and exploit ocean energy have been recently suggested. The most studied ones are: marine current energy, wave energy and ocean ̐thermal energy. This Ph. D. Thesis fits in this context and its main objective is to contribute on control and modelling of a Marine Current Energy Conversion System (MCECS). This requires multi-physics modelling from the hydrokinetic resource to the electricity grid, design and control of an innovative low speed non-conventional generator and its associated power electronic interfaces. At first, turbine concepts, relative projects and usual chain of tidal energy conversion are presented. Tidal current and turbine modelling are secondly addressed. The dynamic modelling of a low speed Double Salient Permanent Magnet Generator (DSPMG) based on finite element method and Park transformations is developed. Results are compared to classical Permanent Magnet Synchronous Generator (PMSG) to highlight advantages, originality, complexity and principal characteristics of the proposed structure. Suitable currents are then determined and tested by simulation in order to deliver a quasi-constant torque and minimise Joule losses. The mutual effect on the generator performances is detailed. Finally, several control strategies are applied to DSPMG associated to a bidirectional back-to-back converter and are analysed. The main results, based on the developed marine current turbine simulation tool, are presented and discussed with illustration by several realistic studies and Matlab/Simulink assessment
Bendjoua, Jamel. "Contribution à l'étude de l'alimentation des machines électriques de fortes puissances : minimisation des ondulations de couple lors de l'alimentation par cycloconvertisseur." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL119N.
Повний текст джерелаPaszek, Michal. "Analýza tepelných vlastností synchronního stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219717.
Повний текст джерелаWu, Hailong. "Modelization and control of synchronous reluctance machines for the torque ripple minimization - study of vibrational and acoustic behavior." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCA003.
Повний текст джерелаThis thesis aims to study the control and optimization of a synchronous reluctance machine for the purpose of improving the vibrational performance. The main works of the thesis can be classified into three parts: the proposed torque ripple reduction method, the factors which can influence the proposed method and the influence of the proposed method.At first, the torque ripple of synchronous reluctance machine is reduced by a control method. Firstly, a torque equation is proposed in order to present the relationship between torque ripple and the optimal currents. Then a new parameter, torque function, is put forward. Based on the torque function, the torque ripple reduction strategy is presented. Two different torque ripple minimizations are proposed by applying different torque function harmonics. They are analyzed and compared in order to define the optimal method. In order to test the proposed method further, the selected torque ripple minimization approach is applied to three SynRMs. The results of finite element simulations imply that the proposed method is effective to decrease the torque ripples of these three SynRMs. The proposed torque ripple reduction method is verified according to the models built in MATLAB/Simulink and the experiment results respectively.Then the factors which could influence the proposed torque ripple reduction method are analyzed. Firstly, torque function is a function of rotor position, current angle and saturation. Based on the model in Simulink, the influence of different starting position on the performance of the studied SynSR is analyzed. Besides, the estimated position errors produced by senserless control could also affect the toque ripple minimization by changing torque function. At last, the influence of saturation on the proposed torque ripple reduction method is introduced because the amplitudes of the optimal currents are increased.In addition, the influence of torque ripple reduction on the other perfomances of SynRM is analyzed. The optimal currents have more harmonics than the original sinusoidal currents. So three losses (copper losses, iron losses and inverter losses) are modeled, calculated, analyzed and compared. According to the results, the copper losses are the most sensible losses. The iron losses and the inverter losses are a little increased and the increased parts can be neglected. Besides, reducing torque ripple by adding stator currents could influence the vibro-acoustic of the studied SynRM. Thus this section aims to explain the relationship between torque ripple reduction and acoustic noise. An analytical equation is proposed in order to evaluate the variation of noise produced by torque ripple reduction. Simulations in Flux 2D have been performed in order to calculate the variation of noise resulted by torque ripple reduction. At last, the software Manatee which is professional in studying the vibration and noise is applied for the purpose of comparing the results with those of the finite element analysis
Farah, Philippe-Siad. "Étude de la réduction des vibrations des machines synchrones." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0087.
Повний текст джерелаHounkonnou, Oussou Kassien. "Étude d'un nouveau type de machine synchrone autopilotée." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL116N.
Повний текст джерелаOlofsson, Jens. "Control of a Synchronous Machine." Thesis, Uppsala University, Electricity, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126960.
Повний текст джерелаThe VAWT project at Uppsala University has successfully managed to develop a vertical axis wind turbine (VAWT). The VAWT has many benefits compared to the Horizontal axis wind turbines (HAWT) which are the most common wind turbine design today. One of the many advantages with the VAWT is that it allows the generator to be located on the ground level. That reduces the required tower strength. The wind turbine is not self starting, i.e. the turbine needs a certain speed before the wind can force the turbine to revolve. The wind turbine is therefore in need of special start procedure. During the start, power electronics is used to operate the generator as a motor. Today Hall latches are located in the air gap of the generator which provides the signals that govern the power electronics. However, there is a demand to have a start that does not require Hall latches. Such controller would increase the reliability of the starter system. The design of the wind turbine could be even more simplified. Hence, the diploma work treats a programmed microcontroller to control the start-up without using any sensors at all. A hub motor was obtained for laboratory work, a driver and an inverter were constructed to drive the motor using a microcontroller. The finished start-up program has the ability to start the hub motor both sensorless and using Hall sensors. The microcontroller controls the motor by measuring the phase voltages of the motor. This information is used to decide which phases of the motor the electric current should go through. The current to the motor is limited using pulse width modulation strategy (PWM). Current limitation is necessary to protect the power electronics and limit the torque during the start. The result of start-ups using both Hall sensor and sensorless showed that the two start strategies are able to accelerate the rotor at the same rate. However, the start-ups using Hall sensors reached a higher top speed than the sensorless starts. However, the wind turbine is not in need of a higher speed than what the sensorless start was able to reach. Thus, the sensorless start is considered to be as good as the start using Hall sensors.
Yu, Yang. "Synchronous Machine for Unidirectional Application." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105832.
Повний текст джерелаRajabi, Moghaddam Reza. "Synchronous Reluctance Machine (SynRM) Design." Thesis, KTH, Elektrisk energiomvandling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153663.
Повний текст джерелаGeoffriault, Maud. "Réduction active des vibrations et des bruits d'une machine électrique par la stratégie de commande." Thesis, CentraleSupélec, 2015. http://www.theses.fr/2015SUPL0003/document.
Повний текст джерелаThis work takes place in the context of the development of powertrains for electric vehicles. Those developments have raised new issues such as noise and vibrations of electrical machines, which are important issues in automotive applications. The aim of this thesis is to develop control laws dedicated to the reduction of currents harmonics that are responsible for vibration harmonics.In that purpose, different parts of the system have been modelled. Parameters of the electrical model of the studied machine have then been identified thanks to experimental measurements.Two different control laws are proposed and developed. One the one hand, a controller is synthetized thanks to H-infinity optimization. On the other hand, the studied current harmonic is modelled as coming from an external disturbance. This virtual disturbance is estimated thanks to an observer and compensated
Kocman, Roman. "Analýza budicího proudu u synchronních strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219908.
Повний текст джерелаBouzekri, Hacène. "Contribution à la commande des machines synchrones à aimants permanents." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL054N.
Повний текст джерелаHoang, Emmanuel. "Fragments de machines synchrones." Habilitation à diriger des recherches, École normale supérieure de Cachan - ENS Cachan, 2012. http://tel.archives-ouvertes.fr/tel-00789156.
Повний текст джерелаLamghari-Jamal, My-Ismail. "Modélisation magnéto-thermique et optimisation de machines rapides : application à la machine synchrone à réluctance variable." Nantes, 2006. http://www.theses.fr/2006NANT2093.
Повний текст джерелаLiu, Chao. "Dimensionnements et comparaisons de convertisseurs électromécaniques à bas coût et à grande disponibilité pour véhicules électriques." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC049/document.
Повний текст джерелаToday, the concerns of the energy crisis and the reduction of gas emissions stimulate the research in several electric vehicle domains. As the cost of rare earth magnetic materials has increased significantly in recent years, electrical motors without permanent magnets draw more attention, such as induction motors, wound-synchronous motors, switched reluctance motors, and synchronous reluctant motors. In this thesis, induction and synchronous reluctant machines are chosen to be studied for the electric vehicle traction application since they are low costly and fed up with similar power electronics and control strategies.Nonlinear analytical models of induction and synchronous reluctant machines are established and validated. Besides, economical and mechanical models are developed as well. Based on established analytical models, the geometry and the control parameters of these studied machines are calculated to define the total energy losses during the driving cycle. A bi-objective optimization is carried out to minimize total energy losses and motor costs. At last, the optimized machines are compared from their electric, energetic and economic performances, with the help of the Pareto Fronts obtained
Teixeira, Julio Carlos. "Étude des machines synchrones à aimants permanents fonctionnant en réduction de flux." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0074.
Повний текст джерелаAl, Asmar Abed Al Kader. "Commande tolérante aux défauts statoriques et de convertisseurs d'un entraînement synchrone à aimants pour l'aéronautique." Thesis, Normandie, 2021. http://www.theses.fr/2021NORMLH03.
Повний текст джерелаThe aim is to study an original electromechanical drive structure based on fault tolerant permanent magnet double stator synchronous machines. This structure has the ability to tolerate inverter short and open faults as well as short circuit faults in windings. An original structure of the windings would limit the consequences of these faults and guarantee the availability of actuations under faults. A Multiphysics model based on electro-magneto-thermal coupling is developed to study the performance of this type of machine in case of failure. A control method that tolerates the short-circuit of an IGBT is sought and implemented. This work was concretized on a dedicated experimental bench integrating the target machine, its supply and its control.This thesis support aeronautical activities in the regions. It is part of the axis "Conversion and transformation of electrical energy" of the electronics network and the theme "Reliability of systems and components" of the Normandy region. The proposed research reinforces efforts to enhance the reliability of electrical actuator systems in the growing electrification of the next generation of electric aircraft.This thesis could strengthen cooperation with the SAFRAN group and in particular Aircelle. In addition, certain aspects can be exploited for future development with ADWEN regarding the availability of electric generators for offshore wind turbines
Peng, Kuan. "Comportement d'une butée de groupe turbo-alternateur : aspects théoriques et expérimentaux." Châtenay-Malabry, Ecole centrale de Paris, 1989. http://www.theses.fr/1989ECAP0093.
Повний текст джерелаBOUFAIED, HEDI. "Machines d'execution pour langages synchrones." Nice, 1998. http://www.theses.fr/1998NICE5234.
Повний текст джерелаIbtiouene, Rachid. "Contribution au dimensionnement électromagnétique d'une machine synchrone autopilotée à aimants insérés." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL109N.
Повний текст джерелаVahedi, Abolfazl. "Modélisation et caractérisation des machines synchro-reluctantes saturées par des méthodes numériques." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL074N.
Повний текст джерелаDaguse, Benjamin. "Modélisation analytique pour le dimensionnement par optimisation d’une machine dédiée à une chaîne de traction hybride à dominante électrique." Thesis, Supélec, 2013. http://www.theses.fr/2013SUPL0012/document.
Повний текст джерелаThe work presented in this thesis aims at the modelling and optimisation of electrical machine for an automotive application.The first part shows the constraints required to electric/hybrid automotive specifications. A clustering method which allows to reduce evaluations number of the operating points is described. Next, an optimal pre-sizing of the machine is presented and designed in order to respect this optimal pre-sizing.In what follows an accurate and fast analytical electromagnetic modelling of the machine is performed. Well, the analytical modelling developed is related to a genetic algorithm. Two solutions of permanent magnet synchronous machines (PMSM) designed to automotive application are finally showed and analysed
Mahmoudi, Mohamad. "Thermal modelling of the Synchronous Reluctance Machine." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96299.
Повний текст джерелаLIMA, GUILHERME AUGUSTO FERREIRA. "A SYNCHRONOUS VIRTUAL MACHINE FOR MULTIMEDIA PRESENTATIONS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26547@1.
Повний текст джерелаCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
As linguagens multimídia de alto-nível atuais são limitadas. Suas limitações decorrem não da ausência de funcionalidades mas da complexidade causada pelo excesso delas e, especialmente, da sua definição não-estruturada. Linguagens como NCL, SMIL e HTML definem diversas construções para controlar a apresentação de dados audiovisuais, porém falham ao não descreverem precisamente como essas construções relacionam-se umas com as outras, particularmente em termos de comportamento. Não há uma separação clara entre construções básicas e construções derivadas; nem um princípio aparente de estruturação hierárquica na sua definição. Usuários dessas linguagens podem dispensar tal princípio, mas ele é imprescindível para as pessoas que definem e implementam essas linguagens: o princípio de estruturação hierárquica torna as especificações e implementações controláveis através da redução da linguagem a um conjunto de conceitos básicos (primitivos). Nesta tese, um conjunto de tais conceitos básicos é proposto e adotado como a linguagem de uma máquina virtual para apresentações multimídia. Mais precisamente, uma nova linguagem multimídia de alto-nível, chamada Smix (Synchronous Mixer), é apresentada e definida de forma a servir como camada de abstração adequada para a definição e implementação de linguagens multimídia de nível superior. Ao definir a linguagem Smix, isto é, ao escolher um conjunto de conceitos básicos, este trabalho visa o minimalismo mas ao mesmo tempo trata alguns dos principais problemas das linguagens multimídia de alto-nível atuais, a saber, os modelos semânticos inadequados de suas especificações e as abordagens não-sistemáticas de suas implementações. No lado da especificação, sustenta-se o uso de uma semântica síncrona simples porém expressiva, com uma noção temporal precisa. No lado da implementação, propõe-se uma arquitetura de duas camadas que facilita o mapeamento dos conceitos da especificação em primitivas de processamento digital de sinais. A camada superior (front end) é a realização da semântica e a camada inferior (back end) estrutura-se como um dataflow para processamento digital de sinais multimídia.
Current high-level multimedia languages are limited. Their limitation stems not from the lack of features but from the complexity caused by the excess of them and, more importantly, by their unstructured definition. Languages such as NCL, SMIL, and HTML define innumerable constructs to control the presentation of audiovisual data, but they fail to describe how these constructs relate to each other, especially in terms of behavior. There is no clear separation between basic and derived constructs, and no apparent principle of hierarchical build-up in their definition. Users may not need such principle, but it is indispensable for the people who define and implement these languages: it makes specifications and implementations manageable by reducing the language to a set of basic (primitive) concepts. In this thesis, a set of such basic concepts is proposed and taken as the language of a virtual machine for multimedia presentations. More precisely, a novel high-level multimedia language, called Smix (Synchronous Mixer), is presented and defined to serve as an appropriate abstraction layer for the definition and implementation of higher level multimedia languages. In defining Smix, that is, choosing a set of basic concepts, this work strives for minimalism but also aims at tackling major problems of current high-level multimedia languages, namely, the inadequate semantic models of their specifications and unsystematic approaches of their implementations. On the specification side, the use of a simple but expressive synchronous semantics, with a precise notion of time, is advocated. On the implementation side, a two-layered architecture that eases the mapping of specification concepts into digital signal processing primitives is proposed. The top layer (front end) is the realization of the semantics, and the bottom layer (back end) is structured as a multimedia digital signal processing dataflow.
Di, Nardo Mauro. "Design of high speed synchronous reluctance machine." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/43223/.
Повний текст джерелаGAMBA, MATTEO. "Design of non conventional Synchronous Reluctance machine." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2669965.
Повний текст джерелаBahri, Elmehdi. "Minimisation active des contraintes générées par les défauts dans les machines électriques : application à la MSAPS." Thesis, Artois, 2017. http://www.theses.fr/2017ARTO0201/document.
Повний текст джерелаThe work carried out in this thesis consists in developing a methodology to reduce the torque ripples generated by a stator fault in a surface permanent magnet synchronous machine. Two faults have been treated: the unbalance of the stator winding, illustrated in the study by a lack of turns, and a stator inter-turns short-circuit. The harmonic torque components generated by the both faults have been identified and the inverse current component to be injected in the supply currents has been determined to reduce the main torque component, which is at twice the supply frequency. Two approaches have been used to determine this inverse current component: an approach based on the air gap flux density resulting from an analytical calculation taking into account the magnetic effect of the currents in each slot, and an approach based on the flux and current space phasor. This second approach makes it possible to implement the correction principle in matlab-simulink simulations. These simulations give convincing results whether the machine operates in a frequency-controlled open loop or in a vector control mode inserted in a speed control loop. Experimental tests have been realized to validate the theoretical study. The used test bench includes a Permanent Magnet Synchronous Machine (PMSM) coupled to a DC machine. The PMSM is powered by an inverter controlled by a dSPACE system able to tune the inverse current component and ensure the vector control. A properly positioned accelerometer is used to measure the tangential vibrations generated by torque fluctuations. For both faults, the reduction of the harmonic of tangential vibrations at twice the supply frequency was demonstrated by injection of an inverse current component. A good agreement between theory and experimentation in terms of the amplitude of the inverse component was obtained
Quernheim, Daniel. "Bimorphism Machine Translation." Doctoral thesis, Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-223667.
Повний текст джерелаVoyant, Jean-Yves. "Calcul des performances d'une machine synchrone à poles saillants." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0195.
Повний текст джерелаThis thesis deals with the analysis of separately-excited synchronous machines (field winding). Mathematical expressions are derived under analytic forms for study and design stages (e. G. Pre-calculation of wave shapes and iron losses). The first chapter introduces electric vehicles (E. V. ) and drive-train particularities. This part shows the constraints which can affect magnetic values inside E. V. Machines. The second chapter develops a calculation method relevant to this context. It allows the analysis of harmonic effects as a result of saliency and machine rotation. This method is based on the study of air-gap permeance (data are obtained once only from a numerical resolution) leading to either punctual or harmonic models of this zone. Complementary information is also given in order to apply the characterisation method to synchronous machines excited with permanent magnets. The next chapters are dedicated to the use and validation of the model forvarious machine operating points. Direct and quadrature-axis inductances are ca1culated for steady-state operation ; the instantaneous flux distribution during rotation is also determined. Cases of high speed with a large. Armature reaction field can be investigated as weIl as cases of maximum torque. The analytic-model results have been compared to those obtained with all-numerical computations (finite elements). The model is able to reconstruct the different cases, with excellent accuracy, even for extensive-saturation cases (core non-linearity). These comparisons confirm the validity of the proposed concept
Ennassiri, Hamza. "Analyse magnéto-vibroacoustique des machines synchrones discoides à commutation de flux dédiées aux véhiculex électriques hybrides." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMLH36/document.
Повний текст джерелаThis PhD thesis deals with the issue of vibroacoustic emissions from the first design phases of electrical machines in order to have robust, reliable and above all efficient machines that meet the constraints in a wide range of applications and especially electrical vehicles. This manuscript is not only interested in the identification and highlighting the vibroacoustic problem, but above all to brought solutions and response elements to certain constraints. Knowing that the vibroacoustic problem is too vast and complex, this thesis focuses on vibroacoustic aspects of electromagnetic origin. To do so, the methods of noise reduction are presented but only the passive reduction solutions are used. These solutions are based on the design and optimization of efficient and less noisy electrical machines. This brings us back to the core of this work, which is the development of tools and multi-physics models combining the criteria of genericity, speed, accuracy and simplicity of coupling. In this context, several electric, magnetic, mechanical, thermal and acoustic models are presented. Different coupling strategies and modeling approaches are investigated. Conclusions are drawn each time according to the needs for the application use case
Hudson, William J. "Interactive electromagnetic circuits for synchronous machines." Thesis, Nottingham Trent University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424651.
Повний текст джерелаDIANA, MICHELA. "Tooth-coil wound multiphase synchronous machines." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2713044.
Повний текст джерелаSuemitsu, Walter. "Asservissement numérique d'une machine synchrone autopilotée." Grenoble INPG, 1986. http://www.theses.fr/1986INPG0066.
Повний текст джерелаChillet, Christian. "Machine synchrone multidisque à aimants permanents." Grenoble INPG, 1988. http://www.theses.fr/1988INPG0125.
Повний текст джерелаSuemitsu, Walter. "Asservissement numérique d'une machine synchrone autopilotée." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37601415r.
Повний текст джерелаChillet, Christian. "Machine synchrone multidisque à aimants permanents." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376127407.
Повний текст джерелаGardell, Jonathan David. "Synchronous machine distributed models for internal fault studies." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1341334132.
Повний текст джерелаBruguier, Cyrille. "Commande d'une machine synchrone à aimants sans capteur mécanique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0133.
Повний текст джерелаNeagoe, Cristian Emil. "Étude de nouvelles structures de machines électriques." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0119.
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