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Author : Roger Champagne
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (798 download)
Download or read book Conception et validation d'un modèle de machine synchrone avec saturation magnétique written by Roger Champagne and published by . This book was released on 1997 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thierry Lubin
Publisher :
ISBN 13 :
Total Pages : 199 pages
Book Rating : 4.:/5 (492 download)
Download or read book Modélisation et commande de la machine synchrone à réluctance variable written by Thierry Lubin and published by . This book was released on 2003 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce mémoire porte sur la modélisation et la commande d'une machine synchrone à réluctance variable présentant une cage au rotor. La première partie est consacrée au développement d'un modèle prenant en compte les effets de la saturation magnétique des matériaux. Ce modèle est basé sur une modification des équations de Park. La saturation magnétique est modélisée par un coefficient variable en fonction de l'ensemble des courants circulants dans la machine. Le modèle présente l'avantage de ne faire apparaître que des paramètres électriques mesurables. La deuxième partie est consacrée à la validation du modèle saturé. Pour cela, nous avons comparé des résultats de simulation avec des résultats expérimentaux. Nous avons étudié le cas où la machine est directement reliée au réseau et le cas où la machine est pilotée en commande vectorielle. Pour la commande vectorielle, nous avons étudié les effets de la saturation sur la dynamique et sur le régime permanent pour une commande en couple et une commande en vitesse. La troisième partie porte sur le développement de deux stratégies de commande pour le régime permanent. La première stratégie permet d'obtenir le couple maximal pour un courant donné. La loi de commande est obtenue à partir des équations du modèle saturé. La deuxième stratégie consiste à optimiser le rendement de la machine. Pour cela, nous recherchons le minimum de la puissance absorbée en utilisant des algorithmes d'optimisation (Fibonacci, section dorée). Les résultats expérimentaux ont montré la faisabilité d'une recherche d'optimum en ligne à partir d'un système mettant en œuvre un DSP (Digital Signal Processor)
Author : SOPHIE.. LASQUELLEC
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (49 download)
Download or read book ELABORATION D'UN MODELE DE MACHINE SYNCHRONE SATUREE COMPATIBLE AVEC LA SIMULATION DE L'ENSEMBLE CONVERTISSEUR-MACHINE-COMMANDE written by SOPHIE.. LASQUELLEC and published by . This book was released on 1998 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS LE DOMAINE DE LA SIMULATION DES ENSEMBLES CONVERTISSEUR-MACHINE-COMMANDE (CMC), LE MODELE DE LA MACHINE DOIT ETRE PRECIS ET RAPIDE EN TEMPS DE CALCUL. LES MODELES EXISTANTS SONT GENERALEMENT BASES SUR LA TRANSFORMATION DE PARK CLASSIQUE (PHENOMENES LINEAIRES) OU MODIFIEE (PRISE EN COMPTE PARTIELLE DE LA SATURATION). NOTRE CONTRIBUTION DANS CE DOMAINE A CONSISTE PRINCIPALEMENT A PROPOSER UN MODELE DE PARK COUPLE A UN CALCUL DE CHAMPS (MAGNETOSTATIQUE, MAGNETODYNAMIQUE) DANS LE CAS DE LA MACHINE SYNCHRONE SATUREE. UNE ETUDE ANALYTIQUE A COMPLETE LA REPRESENTATION DES AMORTISSEURS. LE CALCUL DES PARAMETRES DE LA MACHINE A ETE AINSI OBTENU PUIS VALIDE. L'ETUDE A MONTRE QUE CES PARAMETRES VARIENT DE MANIERE SIGNIFICATIVE AVEC L'ETAT DE SATURATION MAGNETIQUE. OUTRE LES QUALITES DE RAPIDITE ET DE PRECISION, LE COUPLAGE DES MODELES DE PARK ET DE CALCUL DE CHAMPS PERMET EGALEMENT DE S'AFFRANCHIR D'ESSAIS SUR LA MACHINE. LE MODELE AINSI DETERMINE A ETE APPLIQUE A L'ETUDE DE LA MACHINE SYNCHRONE EN REGIME PERMANENT ET TRANSITOIRE. A CETTE APPROCHE, NOUS AVONS ASSOCIE UN MODELE AUX FLUX QUI PERMET DE TENIR COMPTE DES VARIATIONS DES PARAMETRES OBTENUS PAR LE CALCUL DE CHAMPS. NOUS AVONS ENSUITE INTRODUIT LE MODELE DE SATURATION DANS LA SIMULATION DES ENSEMBLES CMC. LES RESULTATS DE SIMULATION DE CES ENSEMBLES ONT ETE VALIDES PAR COMPARAISON AVEC LES MESURES EXPERIMENTALES. CETTE SIMULATION A PERMIS DE METTRE EN EVIDENCE L'EFFICACITE DE L'APPROCHE PROPOSEE EN TERME DE PRECISION ET DE RAPIDITE.
Author : Liva Eric Radaorozandry
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (113 download)
Download or read book Conception et optimisation des machines synchrones avec des modèles analytiques en tenant compte de la saturation magnétique written by Liva Eric Radaorozandry and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hossein-Ali Anvari
Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.:/5 (496 download)
Download or read book Caractérisation des machines synchrones saturées et alimentées par convertisseurs statiques written by Hossein-Ali Anvari and published by . This book was released on 1989 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJET DE CE MEMOIRE EST DE CARACTERISER LES MACHINES SYNCHRONES SATUREES A L'AIDE DES PARAMETRES MESUREES A LEURS BORNES, AFIN DE DEVELOPPER DES MODELES MATHEMATIQUES APPROPRIES POUR L'ETUDE DE LEUR COMPORTEMENT, AUSSI BIEN EN REGIME PERMANENT QU'EN REGIME TRANSITOIRE. CE MEMOIRE EST DIVISE EN 6 CHAPITRES ET POURSUIT LES TROIS BUTS SUIVANTS: LA PRESENTATION DES DIFFERENTS MODELES ET DES PRINCIPALES METHODES D'ANALYSES NUMERIQUES RELATIVES AU PHENOMENE DE LA SATURATION DANS UNE MACHINE SYNCHRONE. L'OBTENTION DES MODELES D'ETAT POUR LES MACHINES SATUREES ET LA FORMULATION DES NOUVELLES FORMES D'EQUATIONS ET LEURS METHODES DE RESOLUTION; L'ETUDE DETAILLEE DE L'EFFET CROISE DE LA SATURATION MAGNETIQUE; L'APPLICATION DES MODELES OBTENUS AUX MACHINES SATUREES ALIMENTEES PAR CONVERTISSEURS STATIQUES ET EN PARTICULIER L'ETUDE DES COMPORTEMENTS D'UNE MACHINE A REDUCTANCE ALIMENTEE PAR UN ONDULEUR OU UN COMMUTATEUR DE COURANT. COMPARAISON DES RESULTATS EXPERIMENTAUX AVEC LES RESULTATS DE SIMULATION POUR S'ASSURER DE LA VALIDITE DES MODELES PRESENTES. LES PARTIES LES PLUS ORIGINALES SONT: INTRODUCTION DES INDUCTANCES DE CARACTERISATION STATIQUES ET DYNAMIQUES EN CIRCUIT OUVERT ET EN COURT-CIRCUIT, REPRESENTATION ANALYTIQUE DES FAMILLES DE COURBES D'AIMANTATION ET INTRODUCTION DE NOTION DE SURFACE D'AIMANTATION; VERIFICATION DE L'EFFET CROISE PAR UNE METHODE DE CALCUL DE CHAMP; PRESENTATION DES MODELES D'ETAT, POUR LA MACHINE ALIMENTEE PAR CONVERTISSEUR EN CONSIDERANT L'EFFET CROISE DE SATURATION
Author : Nicola Bianchi
Publisher : IET
ISBN 13 : 1839532637
Total Pages : 368 pages
Book Rating : 4.8/5 (395 download)
Download or read book Synchronous Reluctance Machines written by Nicola Bianchi and published by IET. This book was released on 2021-12-21 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The comprehensive reference on synchronous reluctance machines, which offer high power density at low cost and support the electrification in the transport sector. This book, written by top academic and industry experts, covers all topics required to design these machines.
Author : Ahmed Belasri
Publisher : Springer Nature
ISBN 13 : 9811554447
Total Pages : 659 pages
Book Rating : 4.8/5 (115 download)
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author : Giorgio Bertotti
Publisher : Academic Press
ISBN 13 : 0080534376
Total Pages : 576 pages
Book Rating : 4.0/5 (85 download)
Download or read book Hysteresis in Magnetism written by Giorgio Bertotti and published by Academic Press. This book was released on 1998-05-21 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive treatment of the physics of hysteresis in magnetism and of the mathematical tools used to describe it. Hysteresis in Magnetism discusses from a unified viewpoint the relationsof hysteresis to Maxwells equations, equilibrium and non-equilibrium thermodynamics, non-linear system dynamics, micromagnetics, and domain theory. These aspects are then applied to the interpretation of magnetization reversal mechanisms: coherent rotation and switching in magnetic particles, stochastic domain wall motion and the Barkhausen effect, coercivity mechanisms and magnetic viscosity, rate-dependent hysteresis and eddy-current losses. The book emphasizes the connection between basic physical ideas and phenomenological models of interest to applications, and, in particular, to the conceptual path going from Maxwells equations and thermodynamics to micromagnetics and to Preisach hysteresis modeling. The reader will get insight into the importance and role of hysteresis in magnetism; In particular, he will learn: which are the fingerprints of hysteresis in magnetism which are the situations in which hysteresis may appear how to describe mathematically these situations how to apply these descriptions to magnetic materials how to interpret and predict magnetic hysteresis phenomena observed experimentally
Author : Wade H. Shafer
Publisher : Springer
ISBN 13 : 9780306341205
Total Pages : 320 pages
Book Rating : 4.3/5 (412 download)
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1976 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Author : International Livestock Research Institute
Publisher : ILRI (aka ILCA and ILRAD)
ISBN 13 : 9789291460038
Total Pages : 268 pages
Book Rating : 4.4/5 (6 download)
Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Author : André Heck
Publisher : Springer
ISBN 13 : 9780792365105
Total Pages : 813 pages
Book Rating : 4.3/5 (651 download)
Download or read book StarBriefs 2001 written by André Heck and published by Springer. This book was released on 2000-11-01 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: When working in the highly technical fields of astronomy and the related space sciences, the practitioner is constantly confronted with a baffling array of different abbreviations, acronyms, contractions, and symbols. The identification and differentiation of these terms is a task which, all too often, can prove to be a near impossible one. With over 140,000 separate dictionary-style entries, and over 20 years in collation, StarBriefs 2001 represents the most comprehensive and accurately validated collection of abbreviations, acronyms, contractions, and symbols within astronomy, related space sciences and other related fields. As such, this invaluable reference source (and its companion volume, StarGuides 2001 should be on the reference shelf of every library, organisation or individual with any interest in these areas. Besides astronomy and space sciences, related fields such as aeronautics, aeronomy, astronautics, atmospheric sciences, chemistry, communications, computer sciences, data processing, education, electronics, engineering, energetics, environmental, geodesy, geophysics, information handling, management, mathematics, meteorology, optics, physics, remote sensing, and so on, are also covered when justified. In addition, there are separate sections devoted to Greek letters, mathematical symbols, special signs and characters, as well as to entries with a numerical prefix. Finally, terms in common use and/or of general interest have also been included where appropriate.
Author : Henry Ericsson Theis
Publisher : CRC Press
ISBN 13 : 1482224100
Total Pages : 670 pages
Book Rating : 4.4/5 (822 download)
Download or read book Handbook of Metalforming Processes written by Henry Ericsson Theis and published by CRC Press. This book was released on 1999-05-26 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting hands-on experience of materials, equipment, tooling and processes used in the industry, this work provides up-to-date information on flat-rolled sheet metal products. It addresses the processing and forming of light-to-medium-gauge flat-rolled sheet metal, illustrating the versatility and myriad uses of this material.
Author : Gerald Joseph Home McCall
Publisher : Geological Society of London
ISBN 13 : 9781862391949
Total Pages : 536 pages
Book Rating : 4.3/5 (919 download)
Download or read book The History of Meteoritics and Key Meteorite Collections written by Gerald Joseph Home McCall and published by Geological Society of London. This book was released on 2006 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Publication has 24 papers with an international authorship, and is prefaced by an introductory overview which presents highlights in the field. The first section covers the acceptance by science of the reality of the falls of rock and metal from the sky, an account that takes the reader from BCE (before common era) to the nineteenth century. The second section details some of the world's most important collections in museums - their origins and development. The Smithsonian chapter also covers the astonishingly numerous finds in the cold desert of Antarctica by American search parties. There are also contributions covering the finds by Japanese parties in the Yamato mountains and the equally remarkable discoveries in the hot deserts of Australia, North Africa, Oman and the USA. The other seven chapters take the reader through the revolution in scientific research on meteoritics in the later part of the twentieth century, including terrestrial impact cratering and extraordinary showers of glass from the sky; tektites, now known to be Earth-impact-sourced. Finally, the short epilogue looks to the future.
Author : C. C. Goodloe
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (317 download)
Download or read book Lightning Protection Guidelines for Aerospace Vehicles written by C. C. Goodloe and published by . This book was released on 1999 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Chevalier François Le
Publisher : Artech House
ISBN 13 : 9781608071357
Total Pages : 422 pages
Book Rating : 4.0/5 (713 download)
Download or read book Principles of Radar and Sonar Signal Processing written by Chevalier François Le and published by Artech House. This book was released on 2002 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Henry Lorentz
Publisher : Historical Dictionaries of Asia, Oceania, and the Middle East
ISBN 13 :
Total Pages : 570 pages
Book Rating : 4.F/5 ( download)
Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Author : Bekir Sami Yilbas
Publisher : Elsevier
ISBN 13 : 0128129832
Total Pages : 332 pages
Book Rating : 4.1/5 (281 download)
Download or read book The Laser Cutting Process written by Bekir Sami Yilbas and published by Elsevier. This book was released on 2017-11-13 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Laser Cutting Process: Analysis and Applications presents a comprehensive understanding of the laser cutting process and its practical applications. The book includes modeling, such as thermal and stress analysis, along with lamp parameter analysis for kerf width predictions and their practical applications, such as laser cutting of metallic and non-metallic materials and assessment of quality. The book provides analytical considerations for laser cutting, the importance of the affecting parameters, stress levels formed in the cutting section, cutting efficiency and cut morphology and metallurgy. It is designed to be used by individuals working in laser machining and high energy processing. Fills the gap between a fundamental understanding of the laser cutting process and the shortcomings of the industrial (practical) applications Discusses new developments in the laser cutting process of difficult to cut materials Includes thermal analysis for various metallic and non-metallic materials Provides information on Quality Assessment Methods
