Etude et réalisation d'un convertisseur statique de fréquence destiné à l'alimentation d'un moteur diphasé PDF Download

Author: Philippe Rouland
Publisher:
ISBN:
Category :
Languages : fr
Pages : 72

View

Book Description

Author: Philippe Graff
Publisher:
ISBN:
Category :
Languages : fr
Pages : 334

View

Book Description
Dans un premier temps d'étude il convient de connaître les réactions d'une machine classique à ce nouveau genre d'alimentation, étant bien entendu que le but final de l'étude sera, dans un second temps, la mise au point d'une machine, peut être différente dans sa réalisation, mais parfaitement adaptée à cette alimentation. Nous nous proposons donc ici de considérer une machine asynchrone classique et d'étudier ses différents modes de fonctionnement quand on l'alimente à travers un système de commutation statique. On peut alors conduire l'étude de deux façons différentes selon qu'on considère que la structure de la machine est fixée (donc qu'on ne modifiera pas le nombre de phases statoriques) et qu'on fait varier la fréquence de l'alimentation ou selon qu'on se fixe le mode d'alimentation et qu'on modifie la structure de la machine en faisant varier le nombre de ses phases. Nous avons fait ces deux types d'étude, mais nous avons mis l'accent sur la deuxième partie, c'est-à-dire qu'on s'est plutôt attaché à étudier les performances comparées d'une machine dont on modifiait la structure dans le sens d'une multiplication de ses phases statoriques. Néanmoins, pour chacune de ces structures nous avons étudié les réactions de la machine alimentée à des fréquences différentes. On se propose d'atteindre deux objectifs : étudier un moteur asynchrone alimenté à fréquence variable (variation de vitesse) ; multiplier le nombre de phases d'alimentation du moteur de façon à se rapprocher d'une machine à commutation.

Author: Miloud BENHAMOU
Publisher:
ISBN:
Category :
Languages : fr
Pages : 7

View

Book Description

Author: Daniel Botte
Publisher:
ISBN:
Category :
Languages : fr
Pages : 67

View

Book Description

Author: Guy Vessillier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 102

View

Book Description

Author: Philippe Gourbesville
Publisher: Springer
ISBN: 9812876154
Category : Science
Languages : en
Pages : 616

View

Book Description
This book is a collection of extended papers based on presentations given during the SIMHYDRO 2014 conference, held in Sophia Antipolis in June 2014. It focuses on the modeling and simulation of fast hydraulic transients, on 3D modeling, and on uncertainties and multiphase flows. The book explores both the limitations and performance of current models and presents the latest developments based on new numerical schemes, high-performance computing, multiphysics and multiscale methods, and better interaction with field or scale model data. It addresses the interests of practitioners, stakeholders, researchers and engineers active in this field.

Author: A. Gerald Rainey
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 316

View

Book Description

Author: Dominique / D. Bonten /
Publisher: CreateSpace
ISBN: 9781494798741
Category :
Languages : en
Pages : 140

View

Book Description
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.

Author: George Basalla
Publisher: Cambridge University Press
ISBN: 1316101584
Category : Technology & Engineering
Languages : en
Pages : 262

View

Book Description
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.

Author: Melvin Kranzberg
Publisher: Oxford University Press, USA
ISBN:
Category : Language Arts & Disciplines
Languages : en
Pages : 792

View

Book Description
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.