Modelisation Et Mesure Des Pertes De Fer Dans Les Machines Electriques

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Contribution à la prise en compte des pertes fer dans la modélisation des machines électriques par éléments finis

Author : Mircea Frăţilă
Publisher :
ISBN 13 :
Total Pages : 175 pages
Book Rating : 4.:/5 (867 download)

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Book Synopsis Contribution à la prise en compte des pertes fer dans la modélisation des machines électriques par éléments finis by : Mircea Frăţilă

Download or read book Contribution à la prise en compte des pertes fer dans la modélisation des machines électriques par éléments finis written by Mircea Frăţilă and published by . This book was released on 2012 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: La prise en compte des pertes fer dans les machines électriques est une étape cruciale lors du processus de conception. L’objectif de ce travail a donc été de valider l’implémentation d’un modèle de pertes fer tout en effectuant une modélisation précise des machines électriques étudiées. Le choix s’est porté sur l’utilisation de modèles de calcul des pertes en post-traitement d’un code par éléments finis. Ainsi, différents modèles analytiques ont été comparés en régime sinusoïdal et non sinusoïdal (sans cycles mineurs) en termes de précision, afin de choisir le plus adapté pour une implantation dans code_Carmel. Par ailleurs, nous avons montré que la prise en compte des cycles mineurs peut être améliorée en remplaçant le terme classique de Steinmetz par un modèle d’hystérésis ou par un modèle analytique adapté. L’implémentation et la précision du modèle analytique ont été évaluées d’abord sur des systèmes simples puis sur plusieurs machines tournantes. La comparaison des résultats simulés avec les mesures issues des essais à vide montre une bonne concordance et démontre la capacité du modèle à estimer les pertes fer avec une bonne précision pour une large gamme de machines électriques et pour les deux types d’alimentations utilisés (sinusoïdale et MLI).

Estimation des pertes fer dans les machines électriques

Author : Thierry Gautreau
Publisher :
ISBN 13 :
Total Pages : 137 pages
Book Rating : 4.:/5 (493 download)

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Book Synopsis Estimation des pertes fer dans les machines électriques by : Thierry Gautreau

Download or read book Estimation des pertes fer dans les machines électriques written by Thierry Gautreau and published by . This book was released on 2005 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Suite aux directives européennes incitant les constructeurs de moteurs électriques à supprimer de leur offre, les moteurs à faible rendement, une politique de conception de moteurs à haut rendement est engagée. Toutefois, l'évaluation préalable, en simulation, de ce paramètre, et notamment des pertes fer de la machine reste aujourd'hui un problème difficile. Dans cette optique, depuis quelques années, un modèle, nommé " Loss Surface ", de calcul a posteriori des pertes fer sous le logiciel éléments finis Flux2DTM a été développé. Au cours de ce travail, plusieurs améliorations sont apportées à ce modèle LS. Un nouveau banc de caractérisation à partir d'un onduleur de tension performant a permis de prolonger en fréquence la surface dynamique LS. Une nouvelle formulation de l'identification de la contribution dynamique, plus simple, a également été réalisée. Au final, les gains apportés sont conséquents. Deux machines synchrones à aimants aux caractéristiques très différentes ont ensuite été utilisées pour évaluer les améliorations sur des structures complexes. La première machine, nous a permis de tester l'impact du niveau d'induction sur l'évolution des pertes fer, et la seconde machine, l'influence de la fréquence. Deux phénomènes physiques importants ont également été étudiés afin de connaître leurs contributions aux pertes d'origine magnétique : les pertes par courants induits dans un matériau massif tel qu'un aimant, et l'effet sur les propriétés magnétiques des contraintes mécaniques induites par le poinçonnage du circuit magnétique.

The Finite Element Method for Electromagnetic Modeling

Author : Gérard Meunier
Publisher : John Wiley & Sons
ISBN 13 : 0470393807
Total Pages : 618 pages
Book Rating : 4.4/5 (73 download)

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Book Synopsis The Finite Element Method for Electromagnetic Modeling by : Gérard Meunier

Download or read book The Finite Element Method for Electromagnetic Modeling written by Gérard Meunier and published by John Wiley & Sons. This book was released on 2010-01-05 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by specialists of modeling in electromagnetism, this book provides a comprehensive review of the finite element method for low frequency applications. Fundamentals of the method as well as new advances in the field are described in detail. Chapters 1 to 4 present general 2D and 3D static and dynamic formulations by the use of scalar and vector unknowns and adapted interpolations for the fields (nodal, edge, face or volume). Chapter 5 is dedicated to the presentation of different macroscopic behavior laws of materials and their implementation in a finite element context: anisotropy and hysteretic properties for magnetic sheets, iron losses, non-linear permanent magnets and superconductors. More specific formulations are then proposed: the modeling of thin regions when finite elements become misfit (Chapter 6), infinite domains by using geometrical transformations (Chapter 7), the coupling of 2D and 3D formulations with circuit equations (Chapter 8), taking into account the movement, particularly in the presence of Eddy currents (Chapter 9) and an original approach for the treatment of geometrical symmetries when the sources are not symmetric (Chapter 10). Chapters 11 to 13 are devoted to coupled problems: magneto-thermal coupling for induction heating, magneto-mechanical coupling by introducing the notion of strong and weak coupling and magneto-hydrodynamical coupling focusing on electromagnetic instabilities in fluid conductors. Chapter 14 presents different meshing methods in the context of electromagnetism (presence of air) and introduces self-adaptive mesh refinement procedures. Optimization techniques are then covered in Chapter 15, with the adaptation of deterministic and probabilistic methods to the numerical finite element environment. Chapter 16 presents a variational approach of electromagnetism, showing how Maxwell equations are derived from thermodynamic principles.

Energy Efficiency in Motor Driven Systems

Author : Francesco Parasiliti
Publisher : Springer Science & Business Media
ISBN 13 : 364255475X
Total Pages : 579 pages
Book Rating : 4.6/5 (425 download)

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Book Synopsis Energy Efficiency in Motor Driven Systems by : Francesco Parasiliti

Download or read book Energy Efficiency in Motor Driven Systems written by Francesco Parasiliti and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports the state of the art of energy-efficient electrical motor driven system technologies, which can be used now and in the near future to achieve significant and cost-effective energy savings. It includes the recent developments in advanced electrical motor end-use devices (pumps, fans and compressors) by some of the largest manufacturers. Policies and programs to promote the large scale penetration of energy-efficient technologies and the market transformation are featured in the book, describing the experiences carried out in different parts of the world. This extensive coverage includes contributions from relevant institutions in the Europe, North America, Latin America, Africa, Asia, Australia and New Zealand.

Détermination et analyse des pertes supplémentaires développées dans les tôles des machines alimentées par convertisseur statique

Download Détermination et analyse des pertes supplémentaires développées dans les tôles des machines alimentées par convertisseur statique PDF Online Free

Author : Serge Errard
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (489 download)

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Book Synopsis Détermination et analyse des pertes supplémentaires développées dans les tôles des machines alimentées par convertisseur statique by : Serge Errard

Download or read book Détermination et analyse des pertes supplémentaires développées dans les tôles des machines alimentées par convertisseur statique written by Serge Errard and published by . This book was released on 1993 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'APPARITION DE PERTES SUPPLEMENTAIRES DANS LA PARTIE FERROMAGNETIQUE D'UNE MACHINE ELECTRIQUE DUES A UNE ALIMENTATION PAR CONVERTISSEUR STATIQUE S'EXPLIQUE DIFFICILEMENT PAR DES CONSIDERATIONS THEORIQUES. POUR CETTE ETUDE, DES TOLES FER-SILICIUM ONT ETE SOUMISES A DES CHAMPS MAGNETIQUES SIMULES PAR UN GENERATEUR DE FONCTIONS ARBITRAIRES ET CONFORMES A CEUX DELIVRES PAR LE CONVERTISSEUR. LES MESURES DE PERTES ET LES TRACES DE CARACTERISTIQUES ONT ETE REALISES PAR UNE CHAINE D'ACQUISITION NUMERIQUE SPECIALEMENT CONCUE. LES DISCUSSIONS ET PREMIERES INTERPRETATIONS S'ARTICULENT AUTOUR DU ROLE DES DIFFERENTS PARAMETRES DU COURANT MAGNETISANT, NOTAMMENT LA FREQUENCE DE DECOUPAGE ET LE TEMPS DE MONTEE. LA POURSUITE DES TRAVAUX ET L'EXPLOITATION DU BANC DE MESURES LAISSENT ENTREVOIR UNE APPLICATION INTERESSANTE POUR LE CALCUL DES STRUCTURES DE MACHINES

Proceedings - International Conference on Large High Voltage Electric Systems (CIGRE).

Author : International Conference on Large High Voltage Electric Systems
Publisher :
ISBN 13 :
Total Pages : 1404 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Proceedings - International Conference on Large High Voltage Electric Systems (CIGRE). by : International Conference on Large High Voltage Electric Systems

Download or read book Proceedings - International Conference on Large High Voltage Electric Systems (CIGRE). written by International Conference on Large High Voltage Electric Systems and published by . This book was released on 1988 with total page 1404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mathematical Models for the Design of Electrical Machines

Author : Frédéric Dubas
Publisher : MDPI
ISBN 13 : 3036503986
Total Pages : 252 pages
Book Rating : 4.0/5 (365 download)

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Book Synopsis Mathematical Models for the Design of Electrical Machines by : Frédéric Dubas

Download or read book Mathematical Models for the Design of Electrical Machines written by Frédéric Dubas and published by MDPI. This book was released on 2021-03-15 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive set of articles reflecting the latest advances and developments in mathematical modeling and the design of electrical machines for different applications. The main models discussed are based on the: i) Maxwell–Fourier method (i.e., the formal resolution of Maxwell’s equations by using the separation of variables method and the Fourier’s series in 2-D or 3-D with a quasi-Cartesian or polar coordinate system); ii) electrical, thermal and magnetic equivalent circuit; iii) hybrid model. In these different papers, the numerical method and the experimental tests have been used as comparisons or validations.

Handbook of Electric Machines

Author : S. A. Nasar
Publisher : McGraw-Hill Companies
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Handbook of Electric Machines by : S. A. Nasar

Download or read book Handbook of Electric Machines written by S. A. Nasar and published by McGraw-Hill Companies. This book was released on 1987 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Terra 2008

Author : Leslie Rainer
Publisher : Getty Publications
ISBN 13 : 1606060430
Total Pages : 438 pages
Book Rating : 4.6/5 (6 download)

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Book Synopsis Terra 2008 by : Leslie Rainer

Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.

Electrical Insulation for Rotating Machines

Author : Greg C. Stone
Publisher : John Wiley & Sons
ISBN 13 : 1118892291
Total Pages : 685 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Electrical Insulation for Rotating Machines by : Greg C. Stone

Download or read book Electrical Insulation for Rotating Machines written by Greg C. Stone and published by John Wiley & Sons. This book was released on 2014-07-02 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fully expanded new edition documenting the significant improvements that have been made to the tests and monitors of electrical insulation systems Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing, and Repair, Second Edition covers all aspects in the design, deterioration, testing, and repair of the electrical insulation used in motors and generators of all ratings greater than fractional horsepower size. It discusses both rotor and stator windings; gives a historical overview of machine insulation design; and describes the materials and manufacturing methods of the rotor and stator winding insulation systems in current use (while covering systems made over fifty years ago). It covers how to select the insulation systems for use in new machines, and explains over thirty different rotor and stator winding failure processes, including the methods to repair, or least slow down, each process. Finally, it reviews the theoretical basis, practical application, and interpretation of forty different tests and monitors that are used to assess winding insulation condition, thereby helping machine users avoid unnecessary machine failures and reduce maintenance costs. Electrical Insulation for Rotating Machines: Documents the large array of machine electrical failure mechanisms, repair methods, and test techniques that are currently available Educates owners of machines as well as repair shops on the different failure processes and shows them how to fix or otherwise ameliorate them Offers chapters on testing, monitoring, and maintenance strategies that assist in educating machine users and repair shops on the tests needed for specific situations and how to minimize motor and generator maintenance costs Captures the state of both the present and past “art” in rotating machine insulation system design and manufacture, which helps designers learn from the knowledge acquired by previous generations An ideal read for researchers, developers, and manufacturers of electrical insulating materials for machines, Electrical Insulation for Rotating Machines will also benefit designers of motors and generators who must select and apply electrical insulation in machines.

Magnetism and Superconductivity

Author : Laurent-Patrick Levy
Publisher : Springer Science & Business Media
ISBN 13 : 3662042711
Total Pages : 470 pages
Book Rating : 4.6/5 (62 download)

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Book Synopsis Magnetism and Superconductivity by : Laurent-Patrick Levy

Download or read book Magnetism and Superconductivity written by Laurent-Patrick Levy and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date work presents a modern vision of magnetism and superconductivity covering both microscopic and phenomenological aspects. The basic information is illustrated with the help of current research topics such as the quantum Hall effect or mesoscopic aspects of superconductivity.

Quantum Mechanics, Volume 3

Author : Claude Cohen-Tannoudji
Publisher : John Wiley & Sons
ISBN 13 : 3527345558
Total Pages : 790 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji

Download or read book Quantum Mechanics, Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Faecal Sludge Management

Author : Linda Strande
Publisher : IWA Publishing
ISBN 13 : 1780404735
Total Pages : 428 pages
Book Rating : 4.7/5 (84 download)

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Book Synopsis Faecal Sludge Management by : Linda Strande

Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.

ELECTRIMACS 2019

Author : Walter Zamboni
Publisher : Springer Nature
ISBN 13 : 3030371611
Total Pages : 749 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis ELECTRIMACS 2019 by : Walter Zamboni

Download or read book ELECTRIMACS 2019 written by Walter Zamboni and published by Springer Nature. This book was released on 2020-04-25 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects a selection of papers presented at ELECTRIMACS 2019, the 13th international conference of the IMACS TC1 Committee, held in Salerno, Italy, on 21st-23rd May 2019. The conference papers deal with modelling, simulation, analysis, control, power management, design optimization, identification and diagnostics in electrical power engineering. The main application fields include electric machines and electromagnetic devices, power electronics, transportation systems, smart grids, electric and hybrid vehicles, renewable energy systems, energy storage, batteries, supercapacitors and fuel cells, and wireless power transfer. The contributions included in Volume 1 are particularly focused on electrical engineering simulation aspects and innovative applications.

Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit

Download Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit PDF Online Free

Author : Stuart Hill
Publisher : Birkhäuser
ISBN 13 : 3034863101
Total Pages : 364 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit by : Stuart Hill

Download or read book Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit written by Stuart Hill and published by Birkhäuser. This book was released on 2013-12-14 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906

Author : International Atomic Energy Agency
Publisher : International Atomic Energy Agency
ISBN 13 : 9789201063205
Total Pages : 72 pages
Book Rating : 4.0/5 (632 download)

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Book Synopsis In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 by : International Atomic Energy Agency

Download or read book In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.

Power Plant Engineering

Author : A. K. Raja
Publisher : New Age International
ISBN 13 : 8122418317
Total Pages : 33 pages
Book Rating : 4.1/5 (224 download)

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Book Synopsis Power Plant Engineering by : A. K. Raja

Download or read book Power Plant Engineering written by A. K. Raja and published by New Age International. This book was released on 2006 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Text-Cum-Reference Book Has Been Written To Meet The Manifold Requirement And Achievement Of The Students And Researchers. The Objective Of This Book Is To Discuss, Analyses And Design The Various Power Plant Systems Serving The Society At Present And Will Serve In Coming Decades India In Particular And The World In General. The Issues Related To Energy With Stress And Environment Up To Some Extent And Finally Find Ways To Implement The Outcome.Salient Features# Utilization Of Non-Conventional Energy Resources# Includes Green House Effect# Gives Latest Information S In Power Plant Engineering# Include Large Number Of Problems Of Both Indian And Foreign Universities# Rich Contents, Lucid Manner