Contribution A Letude Des Pertes Magnetiques En Champs Tournants

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Contribution à l'étude des pertes magnétiques en champs tournants

Author : Salah-Eddine Zouzou
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (489 download)

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Book Synopsis Contribution à l'étude des pertes magnétiques en champs tournants by : Salah-Eddine Zouzou

Download or read book Contribution à l'étude des pertes magnétiques en champs tournants written by Salah-Eddine Zouzou and published by . This book was released on 1991 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE TRAITE DE LA MESURE DES PROPRIETES MAGNETIQUES DES TOLES UTILISEES EN CONSTRUCTION ELECTRIQUE, QUAND ELLES SONT SOUMISES A UN CHAMP D'EXCITATION TOURNANT. NOUS AVONS MIS AU POINT AU BANC DE CARACTERISATION DES TOLES MAGNETIQUES, QUI A PERMIS D'ETUDIER L'AIMANTATION ET LES PERTES EN CHAMP TOURNANT MAIS AUSSI EN CHAMP UNIDIRECTIONNEL D'ORIENTATION QUELCONQUE DANS LE PLAN DE LA TOLE. DIFFERENTES QUALITES DE MATERIAUX ONT ETE MESUREES ET UNE ETUDE COMPARATIVE DES PERTES EN CHAMP TOURNANT ET EN CHAMP UNIAXIAL A ETE EGALEMENT MENEE. LES RESULTATS OBTENUS PERMETTENT D'INTERPRETER LE COMPORTEMENT DES MATERIAUX MAGNETIQUES EN CHAMP TOURNANT ET D'AMELIORER NOS CONNAISSANCES DE MECANISMES PHYSIQUES MIS EN JEU

Contribution à l'étude des pertes fer en champ tournant dans les toles magnétiques pour machines électriques mobiles

Author : Rafik Aouli
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis Contribution à l'étude des pertes fer en champ tournant dans les toles magnétiques pour machines électriques mobiles by : Rafik Aouli

Download or read book Contribution à l'étude des pertes fer en champ tournant dans les toles magnétiques pour machines électriques mobiles written by Rafik Aouli and published by . This book was released on 1995 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE EST CONSACRE A L'ETUDE DES PERTES FER, EN CHAMP MAGNETIQUE TOURNANT, DANS DES TOLES SOUMISES A UNE ONDE D'ENTREFER PROGRESSIVE A REPARTITION TRAPEZOIDALE. POUR CE FAIRE, NOUS AVONS MIS AU POINT UN NOUVEAU DISPOSITIF DE MESURES DE PERTES FER. CELUI-CI PERMET DE TESTER DES TOLES CIRCULAIRES DE FORME ANNULAIRE LISSE OU ENCOCHEE ET LES DISPOSE DANS UN ENVIRONNEMENT MAGNETIQUE PROCHE DES CONDITIONS REELLES DE FONCTIONNEMENT, RENCONTREES DANS LES MACHINES ELECTRIQUES TOURNANTES. ON MESURE LES PERTES FER PAR UNE METHODE DE COUPLE. CELLE-CI CONSISTE A APPLIQUER UN CHAMP MAGNETIQUE TOURNANT A L'ECHANTILLON DE TOLES SOUS TEST ET A MESURER L'INTERACTION ENTRE CE CHAMP ET L'AIMANTATION DU MATERIAU. NOUS AVONS MESURE LES PERTES FER, DANS DES TOLES FER-3%SILICIUM ET ACIER, EN FONCTION DE PARAMETRES ELECTROMAGNETIQUES ET GEOMETRIQUES. L'ENSEMBLE DE CES RESULTATS EXPERIMENTAUX A PERMIS DE METTRE EN EVIDENCE L'INFLUENCE DES CES PARAMETRES SUR L'EVOLUTION DES PERTES FER, POUR LES DIFFERENTES TOLES TESTEES. A PARTIR DE CES RESULTATS EXPERIMENTAUX, NOUS AVONS MODELISE L'EVOLUTION DES PERTES FER EN FONCTION DES PARAMETRES DE MESURES. LA FORMULATION GLOBALE DES PERTES POUR LES DEUX TYPES DE TOLES DE FORME LISSE NE DIFFERE QUE PAR LA VALEUR DE LEURS COEFFICIENTS. POUR LES TOLES FER-3%SILICIUM DE FORME ENCOCHEE, LE MODELE EST DIFFERENT DE CELUI ELABORE POUR LA MEME TOLE DE FORME LISSE. CE QUI CONFIRME QUE CHACUNE D'ELLE CONSTITUE UN SYSTEME ELECTROMAGNETIQUE DIFFERENT. CETTE PREMIERE EXPLOITATION DU BANC DE MESURES OFFRE PLUSIEURS PERSPECTIVES. PARMI CELLES-CI, NOUS PROPOSONS L'ETUDE DE L'INFLUENCE, SUR LES PERTES FER DANS LES TOLES, DE LA FORME DE LEUR ENCOCHAGE, DE LEUR PRESSION D'ASSEMBLAGE, ET DE LA FORME D'ONDE D'ENTREFER

International Conference on Electrical Machines and Drives

Author :
Publisher :
ISBN 13 :
Total Pages : 684 pages
Book Rating : 4.3/5 (91 download)

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Download or read book International Conference on Electrical Machines and Drives written by and published by . This book was released on 1993 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

CONTRIBUTION A L'ETUDE DE L'INFLUENCE DE L'HETEROGENEITE DU CHAMP MAGNETIQUE SUR LES PERTES DANS LES TOLES FESI

Author : JEAN-LUC.. ANDRIAMIFIDY
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis CONTRIBUTION A L'ETUDE DE L'INFLUENCE DE L'HETEROGENEITE DU CHAMP MAGNETIQUE SUR LES PERTES DANS LES TOLES FESI by : JEAN-LUC.. ANDRIAMIFIDY

Download or read book CONTRIBUTION A L'ETUDE DE L'INFLUENCE DE L'HETEROGENEITE DU CHAMP MAGNETIQUE SUR LES PERTES DANS LES TOLES FESI written by JEAN-LUC.. ANDRIAMIFIDY and published by . This book was released on 1995 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS UN PREMIER TEMPS, NOUS AVONS ETABLI UNE METHODE DE PREDETERMINATION DE PERTES DANS LES MACHINES ELECTRIQUES EN SE BASANT SUR LES METHODES NUMERIQUES CLASSIQUEMENT UTILISEES. L'ORDRE DE GRANDEUR DE L'ECART ENTRE LES RESULTATS DE NOTRE PREDETERMINATION EST D'ENVIRON 30% PAR RAPPORT AUX PERTES REELLES. CET ECART EST DU A DES SOURCES DE PERTES SUPPLEMENTAIRES DONT ON N'A PAS TENU COMPTE DANS LES CALCULS. PARMI CES SOURCES DE PERTES NOUS AVONS CHOISI D'ETUDIER L'INFLUENCE DE L'HETEROGENEITE DE L'INDUCTION SUR LES PERTES. DANS UNE DEUXIEME PARTIE, NOUS AVONS MODELISE UNE TOLE MAGNETIQUE SOUMIS A UN GRADIENT D'INDUCTION A L'AIDE D'UN LOGICIEL DE CALCUL DE CHAMP. LA STRUCTURE GEOMETRIQUE D'UNE MACHINE ETANT COMPLEXE, UN ECHANTILLON DE FORME TRAPEZOIDALE EST CHOISIE. CETTE ETUDE A MONTRE QUE LA CONTRIBUTION DE L'EFFET DE FORME DE L'ECHANTILLON SUR LES PERTES PEUT ATTEINDRE 15% DES PERTES TOTALES. ENFIN, DANS LA DERNIERE PARTIE, NOUS AVONS ESSAYE DE METTRE AU POINT DISPOSITIF DE CARACTERISATION D'UNE TOLE SOUMISE A UN GRADIENT D'INDUCTION. CETTE ETUDE A PERMIS DE SOULEVER CERTAINS NOMBRES DE PROBLEMES SUR LE CHOIX DES CAPTEURS ET LA PREPARATION DE L'ECHANTILLON. NOUS AVONS AUSSI PREDETERMINE LES CARACTERISTIQUES MAGNETIQUES DE L'ECHANTILLON DE FORME TRAPEZOIDALE A PARTIR DES CARACTERISTIQUES MAGNETIQUES DES TOLES STANDARDS

Contribution à l'étude des champs magnétiques de deux régions actives

Author : Elisabeth Ribes
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (492 download)

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Book Synopsis Contribution à l'étude des champs magnétiques de deux régions actives by : Elisabeth Ribes

Download or read book Contribution à l'étude des champs magnétiques de deux régions actives written by Elisabeth Ribes and published by . This book was released on 1969 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Contribution à l'étude de l'influence de recuits sur sous-champ croisé sur les pertes magnétiques d'alliages amorphes à base bore

Author : Pierre BAJON
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (494 download)

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Book Synopsis Contribution à l'étude de l'influence de recuits sur sous-champ croisé sur les pertes magnétiques d'alliages amorphes à base bore by : Pierre BAJON

Download or read book Contribution à l'étude de l'influence de recuits sur sous-champ croisé sur les pertes magnétiques d'alliages amorphes à base bore written by Pierre BAJON and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

The telephone, the microphone, and the phonograph. Transl

Author : comte Théodore Achille L. Du Moncel
Publisher :
ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.R/5 (5 download)

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Book Synopsis The telephone, the microphone, and the phonograph. Transl by : comte Théodore Achille L. Du Moncel

Download or read book The telephone, the microphone, and the phonograph. Transl written by comte Théodore Achille L. Du Moncel and published by . This book was released on 1879 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Genie Civil

Author :
Publisher :
ISBN 13 :
Total Pages : 802 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Genie Civil by :

Download or read book Genie Civil written by and published by . This book was released on 1927 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

An Introduction to Differential Manifolds

Author : Jacques Lafontaine
Publisher : Springer
ISBN 13 : 3319207350
Total Pages : 408 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis An Introduction to Differential Manifolds by : Jacques Lafontaine

Download or read book An Introduction to Differential Manifolds written by Jacques Lafontaine and published by Springer. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.

Aeronomy

Author : P. M. Banks
Publisher : Elsevier
ISBN 13 : 1483260666
Total Pages : 445 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis Aeronomy by : P. M. Banks

Download or read book Aeronomy written by P. M. Banks and published by Elsevier. This book was released on 2013-09-24 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.

Annette and Sylvie ...

Author : Romain Rolland
Publisher : New York : H. Holt
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.:/5 (319 download)

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Download or read book Annette and Sylvie ... written by Romain Rolland and published by New York : H. Holt. This book was released on 1925 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Soul Enchanted is a book about the life of a woman. It starts with a twist. A girl is engaged to a wealthy and credited man, from a noble family. On the verge of the wedding, she deeply questions their relationship and calls it off.

Minimum competence in scientific English

Author : Sue Blattes
Publisher : L'Editeur : EDP Sciences
ISBN 13 : 9782868835888
Total Pages : 264 pages
Book Rating : 4.8/5 (358 download)

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Book Synopsis Minimum competence in scientific English by : Sue Blattes

Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.

Walt Whitman

Author : León Bazalgette
Publisher : Legare Street Press
ISBN 13 : 9781016802512
Total Pages : 0 pages
Book Rating : 4.8/5 (25 download)

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Download or read book Walt Whitman written by León Bazalgette and published by Legare Street Press. This book was released on 2022-10-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Popular Astronomy

Author : Camille Flammarion
Publisher :
ISBN 13 :
Total Pages : 732 pages
Book Rating : 4.A/5 ( download)

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Book Synopsis Popular Astronomy by : Camille Flammarion

Download or read book Popular Astronomy written by Camille Flammarion and published by . This book was released on 1894 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Glowworm Swarm Optimization

Author : Krishnanand N. Kaipa
Publisher : Springer
ISBN 13 : 3319515950
Total Pages : 265 pages
Book Rating : 4.3/5 (195 download)

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Book Synopsis Glowworm Swarm Optimization by : Krishnanand N. Kaipa

Download or read book Glowworm Swarm Optimization written by Krishnanand N. Kaipa and published by Springer. This book was released on 2017-01-10 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive account of the glowworm swarm optimization (GSO) algorithm, including details of the underlying ideas, theoretical foundations, algorithm development, various applications, and MATLAB programs for the basic GSO algorithm. It also discusses several research problems at different levels of sophistication that can be attempted by interested researchers. The generality of the GSO algorithm is evident in its application to diverse problems ranging from optimization to robotics. Examples include computation of multiple optima, annual crop planning, cooperative exploration, distributed search, multiple source localization, contaminant boundary mapping, wireless sensor networks, clustering, knapsack, numerical integration, solving fixed point equations, solving systems of nonlinear equations, and engineering design optimization. The book is a valuable resource for researchers as well as graduate and undergraduate students in the area of swarm intelligence and computational intelligence and working on these topics.

An Historical Geography of France

Author : Xavier de Planhol
Publisher : Cambridge University Press
ISBN 13 : 9780521322089
Total Pages : 602 pages
Book Rating : 4.3/5 (22 download)

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Book Synopsis An Historical Geography of France by : Xavier de Planhol

Download or read book An Historical Geography of France written by Xavier de Planhol and published by Cambridge University Press. This book was released on 1994-03-17 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this 1994 book, Xavier de Planhol and Paul Claval, two of France's leading scholars in the field, trace the historical geography of their country from its roots in the Roman province of Gaul to the 1990s. They demonstrate how, for centuries, France was little more than an ideological concept, despite its natural physical boundaries and long territorial history. They examine the relatively late development of a more complex territorial geography, involving political, religious, cultural, agricultural and industrial unities and diversities. The conclusion reached is that only in the twentieth century had France achieved a profound territorial unity and only now are the fragmentations of the past being overwritten.