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Modèlisation et techniques orientées vers le diagnostic de la machine asynchrone associée à des sources variables / Abdesselam Lebaroud
Titre : Modèlisation et techniques orientées vers le diagnostic de la machine asynchrone associée à des sources variables Type de document : texte imprimé Auteurs : Abdesselam Lebaroud ; Univ. de Constantine, Éditeur scientifique ; Amar Bentounsi, Directeur de thèse Année de publication : 2006 Importance : 163 p. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : Diagnostic Machine asynchrone , Sources variables Index. décimale : 622 Electro-Technique En ligne : ../theses/electrotec/LeB4686.pdf Permalink : index.php?lvl=notice_display&id=386 Modèlisation et techniques orientées vers le diagnostic de la machine asynchrone associée à des sources variables [texte imprimé] / Abdesselam Lebaroud ; Univ. de Constantine, Éditeur scientifique ; Amar Bentounsi, Directeur de thèse . - 2006 . - 163 p.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : Diagnostic Machine asynchrone , Sources variables Index. décimale : 622 Electro-Technique En ligne : ../theses/electrotec/LeB4686.pdf Permalink : index.php?lvl=notice_display&id=386 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LEB/4686 LEB/4686 Thèse Bibliothèque principale Thèses Disponible 
Titre : Modelisations et outils d’aide au diagnostic de defauts de machines synchrones et a reluctance variable Type de document : texte imprimé Auteurs : Ilhem Bouchareb, Auteur ; Ammar Bentounsi, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2013 Importance : 200 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : MRV Synchrones R M Modelisation outils d'aide au diagnostic VRM Synchronous R M Modilisation tools for fault diagnosis الألة ذات المعاوقة ؛الألة المتزامنة ذات المعاوقة؛النمذجة؛ أدوات التشخيص Index. décimale : 622 Electro-Technique Résumé :
The « Condition monitoring » of machines has become an art that can diagnose and precisely
potential defects to act quickly before the « break »!
Monitoring and diagnosis of electric machines represent a scientific and economic challenge
motivated by the goals of dependability and continuity of service of electric drives.
Electromechanical converters (engines, generators, actuators…) occupy an increasingly
important in industrial equipment, especially with the new requirements for electric traction or
decentralized energy production with new structures machines. In addition, these devices can
play a critical role in the process which generates severe constraints in terms of dependability
and availability rates, hence the need for robust diagnosis increased and thus the development
of diagnostic tools more efficient. Effective diagnosis paves the way for a fault tolerant
control, and should therefore increase the robustness of the industrial process.
Many approaches and diagnostic procedures are developed for fault detection and diagnosis
by different research communities’ automatic, productics and artificial intelligence. The
methods differ in the type of a priori knowledge about the process that they require. So they
can be classified generally as model-based methods, based on knowledge and methods based
on historical data. Methods based models consider a structural model of the behavior of the
process based on fundamental physical principles. These models can be quantitative type,
expressed as mathematical or qualitative equations, expressed for example in the form of
logical relations. Methods based knowledge exploits the skills, reasoning and expert
knowledge about the process to turn them into rules, so as to solve specific problems.
Finally, methods for database search to discover information, as typical examples and trends
in the measurements from the sensors and actuators, which can identify the behavior of the
process. These methods include, among others, learning methods and classification (or
recognition).
The most recent studies have been devoted to the electrical monitoring of induction machines
in particular the inspection of the stator current. In recent years, research in the field of
electric motor drives for critical industrial applications such as automotive, aerospace,
robotics, nuclear power plants or decentralized production are focused on research level of the
drive motor and various topologies. The concept of the fault tolerant device and the
development of devices dependability are often required to improve the availability of
systems integrating this type of machine, minimize maintenance costs and ensure more
effectively the security of goods and people in direct or indirect relationship with the
application.
That is why we seek to apply proven methods by asynchronous machine (ASM) for other
machine structures, types, synchronous reluctance machines (SynRM) and variable reluctance
machines (VRM) by their growing presence in the areas of fault tolerance. Therefore, all new
results can be of significant interest to all researchers working in the area of fault tolerance.
The work and research developed within the LGEC (Electrical Engineering Laboratory
Constantine) in collaboration with Electrical Machines and Drives Department Technical
University of Cluj-Napoca, Romania are in this part of the Modeling & support tools to diagnose
faults synchronous machines & a variable reluctance. The research topics cover aspects: digital
finite element modeling, using the FLUX-2D 7.6 software and MATLAB-Simulink with the flowFLUX-2D 10.4 and in order to improve the operation of the first type of machine studied and
modeled we proposed new converter model based on the principle of the separation of the phases
then understanding and analysis of different stator and / or rotor faults, research and development
of monitoring tools, diagnosis and fault monitoring driver assistance and human-system
interaction based on the optimal time-frequency representation, called "dependent class signal
(DCS)" whose plane ambiguity is smoothed by a kernel designed to achieve maximum separation
between the defect class and healthy class machine. The separation of classes is performed by
Fisher contrast, based on compactness and reparability of classes. The assignment criteria or
classification of a new signal is based on several intelligent methods by classification algorithms
in order to automate the process of diagnosis: the hidden Markov model (HMM ), combined with
Neural Networks (RN ), K-means (KPP) and the Mahalanobis (MAH ) or Ecludienne (ED)
distance. Different decision rules are compared in the presence or absence of defects and rejected
observations are analyzed to determine the possible emergence of a new mode of operation. The
Kalman filter approach is used for monitoring of evolution developed and allows prediction
modes included in the training set and determine the future state of these modes.
In this context, the thesis consists of four chapters:
The first presents an overview on the supervision and the different approaches for the detection
and diagnosis of faults developed by different research communities, including the signal
approach and the system approach which we have supported our work.
The second chapter provides a finite element design of the fault tolerant switched reluctance
machine consists in modifying their windings. Splitting phase’s independent coils is the
method most widely used for machinery fault tolerance. It is necessary to compensate for the
absence of a phase fault or coil has the least possible changes in the torque characteristic. The
power converter of the machine must also be designed to be fault tolerant. Using the
programmed intelligence converter must be able to reconfigure its control and power of the
machine according to the severity of defects, to continue operating of the machine
The third chapter explains the failures which may form on a whole ‘converter - variable
reluctance machine’ and the occurrence of each of these defects. This chapter is divided into two
main parts. The first part describes the different sources (electrical, mechanical,) failures that can
occur to the machine variable reluctance. As for the second part, it presents different failures that
can undergo a power converter. Finally analyzing of the different measured signals such as
current flow, and electromagnetic torque through Fourier transform (FFT).
Chapter 4 is dedicated to the development of our diagnostic system for variable reluctance
machines. We describe in this section, the means used to obtain the states, transitions and
events associated with these transitions. We show also how this system can be used by the
operator for the purposes of supervision. The selection algorithms parameters vector form
used by the decision-making system are implemented and presented (learning phase). Failures
correspond to a short circuit, open circuit, for various levels of load supply by voltage inverter.
We conclude this paper with a chapter five dedicated to the experimental results obtained during
the application of our diagnostic classification; a description of the experimental and different
modes studied (healthy, faulty) bench is presented. Classification of the new observations with the
implementation of the proposed methods in combination with the experimental data of the
asynchronous machine and variable reluctance machine proves the effectiveness of these
classification methods independently of the type of fault and the type of machine.Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/BOU6390.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9402 Modelisations et outils d’aide au diagnostic de defauts de machines synchrones et a reluctance variable [texte imprimé] / Ilhem Bouchareb, Auteur ; Ammar Bentounsi, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2013 . - 200 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : MRV Synchrones R M Modelisation outils d'aide au diagnostic VRM Synchronous R M Modilisation tools for fault diagnosis الألة ذات المعاوقة ؛الألة المتزامنة ذات المعاوقة؛النمذجة؛ أدوات التشخيص Index. décimale : 622 Electro-Technique Résumé :
The « Condition monitoring » of machines has become an art that can diagnose and precisely
potential defects to act quickly before the « break »!
Monitoring and diagnosis of electric machines represent a scientific and economic challenge
motivated by the goals of dependability and continuity of service of electric drives.
Electromechanical converters (engines, generators, actuators…) occupy an increasingly
important in industrial equipment, especially with the new requirements for electric traction or
decentralized energy production with new structures machines. In addition, these devices can
play a critical role in the process which generates severe constraints in terms of dependability
and availability rates, hence the need for robust diagnosis increased and thus the development
of diagnostic tools more efficient. Effective diagnosis paves the way for a fault tolerant
control, and should therefore increase the robustness of the industrial process.
Many approaches and diagnostic procedures are developed for fault detection and diagnosis
by different research communities’ automatic, productics and artificial intelligence. The
methods differ in the type of a priori knowledge about the process that they require. So they
can be classified generally as model-based methods, based on knowledge and methods based
on historical data. Methods based models consider a structural model of the behavior of the
process based on fundamental physical principles. These models can be quantitative type,
expressed as mathematical or qualitative equations, expressed for example in the form of
logical relations. Methods based knowledge exploits the skills, reasoning and expert
knowledge about the process to turn them into rules, so as to solve specific problems.
Finally, methods for database search to discover information, as typical examples and trends
in the measurements from the sensors and actuators, which can identify the behavior of the
process. These methods include, among others, learning methods and classification (or
recognition).
The most recent studies have been devoted to the electrical monitoring of induction machines
in particular the inspection of the stator current. In recent years, research in the field of
electric motor drives for critical industrial applications such as automotive, aerospace,
robotics, nuclear power plants or decentralized production are focused on research level of the
drive motor and various topologies. The concept of the fault tolerant device and the
development of devices dependability are often required to improve the availability of
systems integrating this type of machine, minimize maintenance costs and ensure more
effectively the security of goods and people in direct or indirect relationship with the
application.
That is why we seek to apply proven methods by asynchronous machine (ASM) for other
machine structures, types, synchronous reluctance machines (SynRM) and variable reluctance
machines (VRM) by their growing presence in the areas of fault tolerance. Therefore, all new
results can be of significant interest to all researchers working in the area of fault tolerance.
The work and research developed within the LGEC (Electrical Engineering Laboratory
Constantine) in collaboration with Electrical Machines and Drives Department Technical
University of Cluj-Napoca, Romania are in this part of the Modeling & support tools to diagnose
faults synchronous machines & a variable reluctance. The research topics cover aspects: digital
finite element modeling, using the FLUX-2D 7.6 software and MATLAB-Simulink with the flowFLUX-2D 10.4 and in order to improve the operation of the first type of machine studied and
modeled we proposed new converter model based on the principle of the separation of the phases
then understanding and analysis of different stator and / or rotor faults, research and development
of monitoring tools, diagnosis and fault monitoring driver assistance and human-system
interaction based on the optimal time-frequency representation, called "dependent class signal
(DCS)" whose plane ambiguity is smoothed by a kernel designed to achieve maximum separation
between the defect class and healthy class machine. The separation of classes is performed by
Fisher contrast, based on compactness and reparability of classes. The assignment criteria or
classification of a new signal is based on several intelligent methods by classification algorithms
in order to automate the process of diagnosis: the hidden Markov model (HMM ), combined with
Neural Networks (RN ), K-means (KPP) and the Mahalanobis (MAH ) or Ecludienne (ED)
distance. Different decision rules are compared in the presence or absence of defects and rejected
observations are analyzed to determine the possible emergence of a new mode of operation. The
Kalman filter approach is used for monitoring of evolution developed and allows prediction
modes included in the training set and determine the future state of these modes.
In this context, the thesis consists of four chapters:
The first presents an overview on the supervision and the different approaches for the detection
and diagnosis of faults developed by different research communities, including the signal
approach and the system approach which we have supported our work.
The second chapter provides a finite element design of the fault tolerant switched reluctance
machine consists in modifying their windings. Splitting phase’s independent coils is the
method most widely used for machinery fault tolerance. It is necessary to compensate for the
absence of a phase fault or coil has the least possible changes in the torque characteristic. The
power converter of the machine must also be designed to be fault tolerant. Using the
programmed intelligence converter must be able to reconfigure its control and power of the
machine according to the severity of defects, to continue operating of the machine
The third chapter explains the failures which may form on a whole ‘converter - variable
reluctance machine’ and the occurrence of each of these defects. This chapter is divided into two
main parts. The first part describes the different sources (electrical, mechanical,) failures that can
occur to the machine variable reluctance. As for the second part, it presents different failures that
can undergo a power converter. Finally analyzing of the different measured signals such as
current flow, and electromagnetic torque through Fourier transform (FFT).
Chapter 4 is dedicated to the development of our diagnostic system for variable reluctance
machines. We describe in this section, the means used to obtain the states, transitions and
events associated with these transitions. We show also how this system can be used by the
operator for the purposes of supervision. The selection algorithms parameters vector form
used by the decision-making system are implemented and presented (learning phase). Failures
correspond to a short circuit, open circuit, for various levels of load supply by voltage inverter.
We conclude this paper with a chapter five dedicated to the experimental results obtained during
the application of our diagnostic classification; a description of the experimental and different
modes studied (healthy, faulty) bench is presented. Classification of the new observations with the
implementation of the proposed methods in combination with the experimental data of the
asynchronous machine and variable reluctance machine proves the effectiveness of these
classification methods independently of the type of fault and the type of machine.Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/BOU6390.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9402 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6390 BOU/6390 Thèse Bibliothèque principale Thèses Disponible Documents numériques
texte intégraleAdobe Acrobat PDF
Titre : Nouvelles architectures distribuées de gestion et de conversion de l’énergie pour les applications photovoltaïques. Type de document : texte imprimé Auteurs : Reda Merahi, Auteur ; Rachid Chenni, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 120 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : Les énergies renouvelables L’énergie PV La stabilité de la fréquence les systèmes de stockage Renewable energies PV energy Frequency stability frequency regulation the storage system الطاقات المتجددة الطاقة الكهروضوئية استقرار التردد أنظمة التخزي Index. décimale : 622 Electro-Technique Résumé : Nowadays, the configuration of the electrical grid knows several considerable changes, these changes are due mainly to the evolution of the types of electricity generation and the variety of sources of energy. Integrating renewable energy in the grid is necessary and mandatory to reduce the consumption of natural resources such as gas and oil. Several constraints are responsible for limiting the integration of renewable energy into the grid, such as the high cost of equipment, the instability of primary resources (solar illumination and wind intensity). Photovoltaic energy is among EnR, which has known an importante evolution, this is due to the simplicity and ease of their installation. The variation of the solar illumination is a constraint that must be treated in order to produce a stable PV energy, and frequency. In this work, we focus on a study of a system able to regulate the frequency, whatever the variation of climatic conditions and the different abnormal situations in the grid. In this thesis, we presented a new method of frequency regulation, this method consists of installing a resistive load at the busbar, its role is to control only the frequency and ensure the stability. In order to test the capacity of this method, we simulated with Matlab / Simulink the various scenarios and variants. The results obtained are acceptable and confirm the feasibility of this method
Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/MER7415.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11068 Nouvelles architectures distribuées de gestion et de conversion de l’énergie pour les applications photovoltaïques. [texte imprimé] / Reda Merahi, Auteur ; Rachid Chenni, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 120 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : Les énergies renouvelables L’énergie PV La stabilité de la fréquence les systèmes de stockage Renewable energies PV energy Frequency stability frequency regulation the storage system الطاقات المتجددة الطاقة الكهروضوئية استقرار التردد أنظمة التخزي Index. décimale : 622 Electro-Technique Résumé : Nowadays, the configuration of the electrical grid knows several considerable changes, these changes are due mainly to the evolution of the types of electricity generation and the variety of sources of energy. Integrating renewable energy in the grid is necessary and mandatory to reduce the consumption of natural resources such as gas and oil. Several constraints are responsible for limiting the integration of renewable energy into the grid, such as the high cost of equipment, the instability of primary resources (solar illumination and wind intensity). Photovoltaic energy is among EnR, which has known an importante evolution, this is due to the simplicity and ease of their installation. The variation of the solar illumination is a constraint that must be treated in order to produce a stable PV energy, and frequency. In this work, we focus on a study of a system able to regulate the frequency, whatever the variation of climatic conditions and the different abnormal situations in the grid. In this thesis, we presented a new method of frequency regulation, this method consists of installing a resistive load at the busbar, its role is to control only the frequency and ensure the stability. In order to test the capacity of this method, we simulated with Matlab / Simulink the various scenarios and variants. The results obtained are acceptable and confirm the feasibility of this method
Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/MER7415.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11068 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MER/7415 MER/7415 Thèse Bibliothèque principale Thèses Disponible
Titre : Observation et commande non-linéaire de la machine asynchrone avec identification on line des paramètres. Type de document : texte imprimé Auteurs : Said Legrioui, Auteur ; Hocine Benalla, Directeur de thèse Mention d'édition : 25/02/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 167 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : ElectroTechnique: Gestion et Transformation de l’Energie Electrique Machine asynchrone (MAS) commande non lineaire la commande directe du couple DTC la logique floue Index. décimale : 622 Electro-Technique Résumé :
The objective of this thesis is the theoretical study and the practical implementation of the direct torque control of the DTC of a squirrel cage induction motor using non-linear and robust techniques with and without a speed sensor. A practical implementation of the DTC have been realized, then, one aimed at improving the robustness and the stability of the control algorithm by replacing the linear PI Controller used in the speed loop by a nonlinear control law using fuzzy logic control FLC and sliding mode control SMC with exponential reaching law ERL. Using these non-linear techniques with DTC allows for a fast dynamic response, with low ripple rank and robust control against external disturbances and system uncertainties. After that, we inserted a control strategy without speed sensor. The adaptive MRAS reference system was used for the joint on-line estimation of rotational speed, stator resistance, and rotor time constant. Since this technique contains three conventional PI controllers, we will proceed to improve it by combining it with one of the intelligent technologies, namely artificial neural networks.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/electrotec/LEG7741.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11574 Observation et commande non-linéaire de la machine asynchrone avec identification on line des paramètres. [texte imprimé] / Said Legrioui, Auteur ; Hocine Benalla, Directeur de thèse . - 25/02/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 167 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : ElectroTechnique: Gestion et Transformation de l’Energie Electrique Machine asynchrone (MAS) commande non lineaire la commande directe du couple DTC la logique floue Index. décimale : 622 Electro-Technique Résumé :
The objective of this thesis is the theoretical study and the practical implementation of the direct torque control of the DTC of a squirrel cage induction motor using non-linear and robust techniques with and without a speed sensor. A practical implementation of the DTC have been realized, then, one aimed at improving the robustness and the stability of the control algorithm by replacing the linear PI Controller used in the speed loop by a nonlinear control law using fuzzy logic control FLC and sliding mode control SMC with exponential reaching law ERL. Using these non-linear techniques with DTC allows for a fast dynamic response, with low ripple rank and robust control against external disturbances and system uncertainties. After that, we inserted a control strategy without speed sensor. The adaptive MRAS reference system was used for the joint on-line estimation of rotational speed, stator resistance, and rotor time constant. Since this technique contains three conventional PI controllers, we will proceed to improve it by combining it with one of the intelligent technologies, namely artificial neural networks.
Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/electrotec/LEG7741.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11574 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LEG/7741 LEG/7741 Thèse Bibliothèque principale Thèses Disponible
Titre : Optimisation du profil de l'induction magnétique Pour application de la séparation des particules non homogènes en voies sèche et humide. Type de document : texte imprimé Auteurs : Mehdi Ouili, Auteur ; Rabia Mehasni, Directeur de thèse ; Mouloud Feliachi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 115 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : Aimant permanent éléments finis tambour optimisation par essaim de particules séparation magnétique Permanent magnet finite element drum particle swarm optimization magnetic separation مغناطيس دائم العناصر المنتهية أسطوانة عزل مغناطيسي تحسين سرب الجزيئات Index. décimale : 622 Electro-Technique Résumé :
The presented work in this thesis presents a contribution to the process of magnetic separation problems. This study based mainly on study and realization of an eddy current magnetic separator with a horizontal drum dedicated to ferromagnetic, diamagnetic, paramagnetic and conductive particles separation in dry and wet ways. A two-dimensional approach based on the model equations coupling governing the existing phenomena (magnetic, hydraulic and particle dynamics) has been developed and used to treat the magnetic separation problem. In order to achieve a successful separation, optimization of the proposed separator has been accomplished. This optimization requires the key parameters identification on which the separation depends. Such identification requires a resolution and analysis of the separation problem taking into account the existing phenomena evolution. The optimization carried out is based on the minimization of an objective function which is the distance between the end point of the separation and a chosen position in a way to take into account the specifications of the applied magnetic field and the velocities of the belt and liquid. For this, the Particle Swarm Optimization (PSO) method was used. In order to validate the approaches and the developed and implemented calculation codes on one hand, to verify the theoretical analysis carried out and the performances of the designed separator and to define the limits of its use on the other hand, experiments have been carried out in dry way. The device consists mainly of a drum with a succession of identical permanent magnets successively arranged with alternating polarity and driven by a motor controlled by a variable speed drive. Transport of the treated material is ensured by a conveyor belt running independently of the drum. The qualitative comparison of theoretical and experimental results showed a great concordance which validates the different approaches and performed calculations.Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/OUI7556.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11394 Optimisation du profil de l'induction magnétique Pour application de la séparation des particules non homogènes en voies sèche et humide. [texte imprimé] / Mehdi Ouili, Auteur ; Rabia Mehasni, Directeur de thèse ; Mouloud Feliachi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2019 . - 115 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : Aimant permanent éléments finis tambour optimisation par essaim de particules séparation magnétique Permanent magnet finite element drum particle swarm optimization magnetic separation مغناطيس دائم العناصر المنتهية أسطوانة عزل مغناطيسي تحسين سرب الجزيئات Index. décimale : 622 Electro-Technique Résumé :
The presented work in this thesis presents a contribution to the process of magnetic separation problems. This study based mainly on study and realization of an eddy current magnetic separator with a horizontal drum dedicated to ferromagnetic, diamagnetic, paramagnetic and conductive particles separation in dry and wet ways. A two-dimensional approach based on the model equations coupling governing the existing phenomena (magnetic, hydraulic and particle dynamics) has been developed and used to treat the magnetic separation problem. In order to achieve a successful separation, optimization of the proposed separator has been accomplished. This optimization requires the key parameters identification on which the separation depends. Such identification requires a resolution and analysis of the separation problem taking into account the existing phenomena evolution. The optimization carried out is based on the minimization of an objective function which is the distance between the end point of the separation and a chosen position in a way to take into account the specifications of the applied magnetic field and the velocities of the belt and liquid. For this, the Particle Swarm Optimization (PSO) method was used. In order to validate the approaches and the developed and implemented calculation codes on one hand, to verify the theoretical analysis carried out and the performances of the designed separator and to define the limits of its use on the other hand, experiments have been carried out in dry way. The device consists mainly of a drum with a succession of identical permanent magnets successively arranged with alternating polarity and driven by a motor controlled by a variable speed drive. Transport of the treated material is ensured by a conveyor belt running independently of the drum. The qualitative comparison of theoretical and experimental results showed a great concordance which validates the different approaches and performed calculations.Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/OUI7556.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11394 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité OUI/7556 OUI/7556 Thèse Bibliothèque principale Thèses Disponible
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