Optimisation de l'alimentation des convertisseurs électromécaniques linéaires à induction PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Optimisation de l'alimentation des convertisseurs électromécaniques linéaires à induction PDF full book. Access full book title Optimisation de l'alimentation des convertisseurs électromécaniques linéaires à induction by Noureddine Takorabet. Download full books in PDF and EPUB format.
Author: Noureddine Takorabet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 136
Get Book Here
Book Description
Ce travail est consacré à l'étude des convertisseurs électromécaniques linéaires à induction que l'on peut rencontrer dans la traction ou dans le pompage électromagnétique des métaux liquides. L’adéquation de l'alimentation électrique des convertisseurs linéaires à un effet recherche (pompage, traction ou freinage) est essentielle. Un modèle suffisamment rapide pour se prêter à l'optimisation vis-à-vis de différents critères est développé. La difficulté principale de la modélisation par la méthode des éléments finis réside dans le mouvement de l'induit. Cette difficulté est contournée en introduisant une condition aux limites particulières sur la surface de l'induit (convolution entre le potentiel vecteur et sa dérivée normale), ce qui permet de restreindre les parties numériques de la résolution au domaine fixe. Le modèle est utilisé pour la recherche des alimentations qui optimisent le rendement, la poussée ou bien la force de freinage. On a pu ainsi concevoir des enroulements spécifiques, pour différents modes de fonctionnement et à différentes vitesses, qui autorise un gain appréciable sur le rendement ou sur la poussée ramenée aux pertes joule dans l'inducteur. On a aussi analysé les différents champs de force dans l'induit avant et après optimisation
Author: Noureddine Takorabet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 136
Get Book Here
Book Description
Ce travail est consacré à l'étude des convertisseurs électromécaniques linéaires à induction que l'on peut rencontrer dans la traction ou dans le pompage électromagnétique des métaux liquides. L’adéquation de l'alimentation électrique des convertisseurs linéaires à un effet recherche (pompage, traction ou freinage) est essentielle. Un modèle suffisamment rapide pour se prêter à l'optimisation vis-à-vis de différents critères est développé. La difficulté principale de la modélisation par la méthode des éléments finis réside dans le mouvement de l'induit. Cette difficulté est contournée en introduisant une condition aux limites particulières sur la surface de l'induit (convolution entre le potentiel vecteur et sa dérivée normale), ce qui permet de restreindre les parties numériques de la résolution au domaine fixe. Le modèle est utilisé pour la recherche des alimentations qui optimisent le rendement, la poussée ou bien la force de freinage. On a pu ainsi concevoir des enroulements spécifiques, pour différents modes de fonctionnement et à différentes vitesses, qui autorise un gain appréciable sur le rendement ou sur la poussée ramenée aux pertes joule dans l'inducteur. On a aussi analysé les différents champs de force dans l'induit avant et après optimisation
Author: Philippe Basset
Publisher: John Wiley & Sons
ISBN: 1848217161
Category : Technology & Engineering
Languages : en
Pages : 244
Get Book Here
Book Description
Harvesting kinetic energy is a good opportunity to power wireless sensor in a vibratory environment. Besides classical methods based on electromagnetic and piezoelectric mechanisms, electrostatic transduction has a great perspective in particular when dealing with small devices based on MEMS technology. This book describes in detail the principle of such capacitive Kinetic Energy Harvesters based on a spring-mass system. Specific points related to the design and operation of kinetic energy harvesters (KEHs) with a capacitive interface are presented in detail: advanced studies on their nonlinear features, typical conditioning circuits and practical MEMS fabrication.
Author: Herbert H. Woodson
Publisher:
ISBN:
Category : Electromechanical devices
Languages : en
Pages : 436
Get Book Here
Book Description
Author: Vladimir N. Kestelman
Publisher: Springer Science & Business Media
ISBN: 9780792377542
Category : Technology & Engineering
Languages : en
Pages : 300
Get Book Here
Book Description
Recently a new sphere in materials science· has formed which subject is structure and properties of electret materials used in engineering, medicine, biotechnology and other branches. It is characterized by specific methods of experimental investigations based on recording charge transfer, polarization and depolarization of dielectrics and involves original techniques and physico-mathematical aids where notions that exist at the interface of several natural and technical sciences are concentrated. It embraces a vast area of applications mainly in engineering, instrument making, electronics, medical technique, biotechnology, and etc., has a specialized technological base for electric polarization of dielectrics composed of uncommon technological methods, equipment and instrumentation. Apparently, future fundamental investigations in the domain of electret materials science are to be developed at the interface of computer of dielectrics. Elaboration of a simulation, physics and physical chemistry model for electric polarization of solid media with uneven charge density distribution, complicated by surface phenomena, outer electromagnetic, heat, chemical and other effects, presents a grave methodological problem. The simulation of structures in which polarization follows diffusion mechanism of chemically active molecules or their fragments, and the development of calculation methods for polarized charge relaxation and regularities of dielectric nonlinear properties, are the most urgent objectives of current research. Success in bioelectret effect studies is anticipated to result in profound widening of natural science knowledge.
Author: Jacek F. Gieras
Publisher: CRC Press
ISBN: 1439842221
Category : Technology & Engineering
Languages : en
Pages : 524
Get Book Here
Book Description
Considered to be the first book devoted to the subject, Linear Synchronous Motors: Transportation and Automation Systems, Second Edition evaluates the state of the art, demonstrating the technological innovations that are improving the design, construction, and performance of modern control systems. This new edition not only illustrates the development of linear synchronous motor drives, but it also discusses useful techniques for selecting a motor that will meet the specific requirements of linear electrical drives. New Features for the Second Edition: Several updated and expanded sections, as well as two new chapters on FEM Even more numerical examples, calculations, and mathematical models Broadened target audience that includes researchers, scientists, students, and more Evaluating trends and practical techniques for achieving optimal system performance, the authors showcase ready-to-implement solutions for common roadblocks in this process. The book presents fundamental equations and calculations used to determine and evaluate system operation, efficiency, and reliability, with an exploration of modern computer-aided design of linear synchronous motors, including the finite element approach. It covers topics such as linear sensors and stepping motors, magnetic levitation systems, elevators, and factory automation systems. It also features case studies on flat PM, tubular PM, air-cored, and hybrid linear synchronous motors, as well as 3D finite element method analysis of tubular linear reluctance motors, and linear oscillatory actuators. With such an exceptional presentation of practical tools and conceptual illustrations, this volume is an especially powerful resource. It will benefit readers from all walks by providing numerical examples, models, guidelines, and diagrams to help develop a clear understanding of linear synchronous motor operations, characteristics, and much more.
Author: Jean-Marie Basset
Publisher: Wiley-VCH
ISBN: 9783527319725
Category : Science
Languages : en
Pages : 725
Get Book Here
Book Description
Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Author: Georgios B. Giannakis
Publisher: John Wiley & Sons
ISBN: 047146287X
Category : Technology & Engineering
Languages : en
Pages : 488
Get Book Here
Book Description
Eine vielversprechende Technologie zur Maximierung der Bandbreiteneffizienz in der breitbandigen drahtlosen Kommunikation ist die Raum-Zeit-Kodierung. Theorie und Praxis verbindend, ist dieses Buch die erste umfassende Diskussion von Grundlagen und designorientierten Aspekten von Raum-Zeit-Codes. Single-Carrier und Multi-Carrier-Übertragungen für Einzel- und Mehrnutzerkommunikation werden behandelt.
Author: Miroslav Chomat
Publisher: BoD – Books on Demand
ISBN: 9533075481
Category : Technology & Engineering
Languages : en
Pages : 278
Get Book Here
Book Description
The subject of this book is an important and diverse field of electric machines and drives. The twelve chapters of the book written by renowned authors, both academics and practitioners, cover a large part of the field of electric machines and drives. Various types of electric machines, including three-phase and single-phase induction machines or doubly fed machines, are addressed. Most of the chapters focus on modern control methods of induction-machine drives, such as vector and direct torque control. Among others, the book addresses sensorless control techniques, modulation strategies, parameter identification, artificial intelligence, operation under harsh or failure conditions, and modelling of electric or magnetic quantities in electric machines. Several chapters give an insight into the problem of minimizing losses in electric machines and increasing the overall energy efficiency of electric drives.
Author: F Lasnier
Publisher: CRC Press
ISBN: 9780852743119
Category : Science
Languages : en
Pages : 576
Get Book Here
Book Description
The Photovoltaic Engineering Handbook is the first book to look closely at the practical problems involved in evaluating and setting up a photovoltaic (PV) power system. The author's comprehensive knowledge of the subject provides a wealth of theoretical and practical insight into the different procedures and decisions that designers need to make. Unique in its coverage, the book presents technical information in a concise and simple way to enable engineers from a wide range of backgrounds to initiate, assess, analyze, and design a PV system. It is beneficial for energy planners making decisions on the most appropriate system for specific needs, PV applications engineers, and anyone confronting the practical difficulties of setting up a PV power system.
