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Determination Et Analyse Des Pertes Supplementaires Developpees Dans Les Toles Des Machines Alimentees Par Convertisseur Statique
Download Determination Et Analyse Des Pertes Supplementaires Developpees Dans Les Toles Des Machines Alimentees Par Convertisseur Statique full books in PDF, epub, and Kindle. Read online Determination Et Analyse Des Pertes Supplementaires Developpees Dans Les Toles Des Machines Alimentees Par Convertisseur Statique ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
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
Book Synopsis DETERMINATION DES PERTES SUPPLEMENTAIRES DES CONDUCTEURS PLACES DANS DES ENCOCHES by : MAMMOUD.. SFAXI
Download or read book DETERMINATION DES PERTES SUPPLEMENTAIRES DES CONDUCTEURS PLACES DANS DES ENCOCHES written by MAMMOUD.. SFAXI and published by . This book was released on 1995 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: EN RAISON DE L'ORIENTATION DES CONVERTISSEURS VERS LES HAUTES FREQUENCES ET L'EVOLUTION DES MOTEURS VERS DES PUISSANCES PLUS GRANDES, L'IMPORTANCE DES PERTES SUPPLEMENTAIRES DEVIENT DE PLUS EN PLUS EVIDENTE. L'OBJET DE CE TRAVAIL EST L'ANALYSE ET LA DETERMINATION DES PERTES SUPPLEMENTAIRES QUI APPARAISSENT DANS LES CONDUCTEURS DES ENCOCHES. UN RAPPEL DES PHENOMENES PHYSIQUES LIEES AUX PERTES SUPPLEMENTAIRES EST PRESENTE PAR UN CALCUL ANALYTIQUE. CE CALCUL, PAR HYPOTHESE, EST LIMITE. AFIN, D'ETENDRE L'ANALYSE ET D'ETUDIER L'IMPACT DES PARAMETRES PHYSIQUES ET GEOMETRIQUES SUR LA VARIATION DES PERTES SUPPLEMENTAIRES, NOUS AVONS DEVELOPPE UN MODELE NUMERIQUE. LA MODIFICATION DE LA GEOMETRIE DE L'ENCOCHE, DE LA CONFIGURATION DES CONDUCTEURS AINSI QUE LEUR MODE DE CONNEXION (SERIE-PARALLELE) ET LA VARIATION DE LA PERMEABILITE DES MATERIAUX MAGNETIQUES PRESENTENT UN MAJEUR FACTEUR A PRENDRE EN COMPTE LORS DE LA DETERMINATION DES PERTES. DEUX ASPECTS DES PERTES SUPPLEMENTAIRES SONT PRESENTES ; LES PERTES DUES AUX VARIATIONS DES COURANTS DANS LES CONDUCTEURS, LES PERTES DUES AUX VARIATIONS DU CHAMP INDUCTEUR. UNE ETUDE EXPERIMENTALE BASE SUR LA METHODE CALORIMETRIQUE A PERMIS DE VALIDER LE MODELE DE CALCUL. CETTE METHODE CONCERNE LE COMPORTEMENT THERMIQUE DES BARRES ROTORIQUES, CELLES-CI SONT SOUMISES A UN CHAMP TOURNANT. LE MODELE ETANT VALIDE EST APPLIQUE A UNE MACHINE INDUSTRIELLE A COURANT CONTINU. DANS CETTE APPLICATION, LA VARIATION DU COURANT INDUIT AU MOMENT DE LA COMMUTATION, AINSI QUE LA CARTOGRAPHIE DU CHAMP INDUCTEUR ONT ETE INTRODUITES DANS LE MODELE DE CALCUL. LES RESULTATS AINSI DETERMINES SONT ENSUITE COMPARES AUX RESULTATS EXPERIMENTAUX OBTENUS PAR LA METHODE DES PERTES SEPAREES
Book Synopsis L'Esprit de L'Escalier by : Dominique / D. Bonten /
Download or read book L'Esprit de L'Escalier written by Dominique / D. Bonten / and published by CreateSpace. This book was released on 2014-01 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'esprit de L'escalier is a French term for when you think of what you should have said after it is too late. This is a collection of poetry; These are things you wish you said.
Book Synopsis The Evolution of Technology by : George Basalla
Download or read book The Evolution of Technology written by George Basalla and published by Cambridge University Press. This book was released on 1989-02-24 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an evolutionary theory of technological change based upon recent scholarship in the history of technology and upon relevant material drawn from economic history and anthropology. It challenges the popular notion that technology advances by the efforts of a few heroic individuals who produce a series of revolutionary inventions owing little or nothing to the technological past. Therefore, the book's argument is shaped by analogies taken selectively from the theory of organic evolution, and not from the theory and practice of political revolution. Three themes appear, and reappear with variations, throughout the study. The first is diversity: an acknowledgment of the vast numbers of different kinds of made things (artifacts) that have long been available to humanity; the second is necessity: the belief that humans are driven to invent new artifacts in order to meet basic biological requirements such as food, shelter, and defense; and the third is technological evolution: an organic analogy that explains both the emergence of novel artifacts and their subsequent selection by society for incorporation into its material life without invoking either biological necessity or technological progress. Although the book is not intended to provide a strict chronological account of the development of technology, historical examples - including many of the major achievements of Western technology: the waterwheel, the printing press, the steam engine, automobiles and trucks, and the transistor - are used extensively to support its theoretical framework. The Evolution of Techology will be of interest to all readers seeking to learn how and why technology changes, including both students and specialists in the history of technology and science.
Book Synopsis Technology in Western Civilization: Technology in the twentieth century by : Melvin Kranzberg
Download or read book Technology in Western Civilization: Technology in the twentieth century written by Melvin Kranzberg and published by Oxford University Press, USA. This book was released on 1967 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete and well-planned account of the history of technology in Western civilization from pre-historic man to the present age of the computer.
Book Synopsis An Encyclopaedia of the History of Technology by : Ian McNeil
Download or read book An Encyclopaedia of the History of Technology written by Ian McNeil and published by . This book was released on 1996 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt: Available for the first time in paperback, this volume includes twenty-two chapters by international experts covering the entire history of technology from humankind's earliest use of stone tools to the exploration of space. Written clearly and without unnecessary jargon, each chapter traces the development of its subject from earliest times to the present day, stressing the social context and its place in scientific thought. * Usefully drawn with over 150 tables, drawings and photographs * Two comprehensive indexes of names and subjects * Essential reading for teachers and students in the History and Philosophy of Science and Technology, Industrial History and Archaeology.
Book Synopsis A History of Technology: The Mediterranean civilizations and the Middle Ages, c. 700 B.C. to c. 1500 A.D by : Charles Singer
Download or read book A History of Technology: The Mediterranean civilizations and the Middle Ages, c. 700 B.C. to c. 1500 A.D written by Charles Singer and published by . This book was released on 1954 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
