Download or read book Etude de l int gration d une protection par fusible dans les convertisseurs IGBT written by Viet-Son Duong and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les progrès technologiques réalisés en matière d'interrupteurs semiconducteurs de puissance, ont conduit au début des années 80, à l'apparition du transistor bipolaire à grille isolée, plus couramment désigné sous l'abréviation IGBT. Etant donnés les niveaux de puissance que ces composants sont aujourd'hui aptes à commuter, une protection contre les défauts devient nécessaire. Un fusible rapide associé au composant permet d'éviter l'explosion du boîtier en cas de court-circuit, et ainsi de garantir la sécurité des personnes et des divers composants à proximité. Une étude du comportement de l'IGBT en régime de court-circuit a été entreprise afin d'évaluer une valeur caractéristique de l'explosion, et de dimensionner précisément le calibre du fusible. L'intégration d'un fusible dans un convertisseur à IGBT passe en premier lieu par l'étude des perturbations générées par le convertisseur sur le fusible. Ces perturbations, associées aux effets de proximité, se traduisent par une répartition déséquilibrée des courants entre des fusibles en parallèle ou même entre les éléments fusibles. Ainsi, nous nous sommes attachés à élaborer un modèle électrothermique du fusible permettant de calculer la répartition des courants et la température des éléments fusibles. Ce modèle permet de définir des abaques, en liaison avec un critère thermique de bon fonctionnement des fusibles. En second lieu, nous avons analysé les perturbations engendrées par le fusible sur le convertisseur. Celles-ci se traduisent principalement par l'introduction d'une inductance supplémentaire dans le circuit, laquelle pouvant être néfaste au fonctionnement du convertisseur. Nous avons proposé quelques règles de conception permettant de réduire l'inductance rajoutée.
Download or read book ETUDE DE L INTEGRATION D UNE PROTECTION PAR FUSIBLE DANS LES CONVERTISSEURS A IGBT written by VIET-SON.. DUONG and published by . This book was released on 1997 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES PROGRES TECHNOLOGIQUES REALISES EN MATIERE D'INTERRUPTEURS SEMICONDUCTEURS DE PUISSANCE, ONT CONDUIT AU DEBUT DES ANNEES 80, A L'APPARITION DU TRANSISTOR BIPOLAIRE A GRILLE ISOLEE, PLUS COURAMMENT DESIGNE SOUS L'ABREVIATION IGBT. ETANT DONNES LES NIVEAUX DE PUISSANCE QUE CES COMPOSANTS SONT AUJOURD'HUI APTES A COMMUTER, UNE PROTECTION CONTRE LES DEFAUTS DEVIENT NECESSAIRE. UN FUSIBLE RAPIDE ASSOCIE AU COMPOSANT PERMET D'EVITER L'EXPLOSION DU BOITIER EN CAS DE COURT-CIRCUIT, ET AINSI DE GARANTIR LA SECURITE DES PERSONNES ET DES DIVERS COMPOSANTS A PROXIMITE. UNE ETUDE DU COMPORTEMENT DE L'IGBT EN REGIME DE COURT-CIRCUIT A ETE ENTREPRISE AFIN D'EVALUER UNE VALEUR CARACTERISTIQUE DE L'EXPLOSION, ET DE DIMENSIONNER PRECISEMENT LE CALIBRE DU FUSIBLE. L'INTEGRATION D'UN FUSIBLE DANS UN CONVERTISSEUR A IGBT PASSE EN PREMIER LIEU PAR L'ETUDE DES PERTURBATIONS GENEREES PAR LE CONVERTISSEUR SUR LE FUSIBLE. CES PERTURBATIONS, ASSOCIEES AUX EFFETS DE PROXIMITE, SE TRADUISENT PAR UNE REPARTITION DESEQUILIBREE DES COURANTS ENTRE DES FUSIBLES EN PARALLELE OU MEME ENTRE LES ELEMENTS FUSIBLES. AINSI, NOUS NOUS SOMMES ATTACHES A ELABORER UN MODELE ELECTROTHERMIQUE DU FUSIBLE PERMETTANT DE CALCULER LA REPARTITION DES COURANTS ET LA TEMPERATURE DES ELEMENTS FUSIBLES. CE MODELE PERMET DE DEFINIR DES ABAQUES, EN LIAISON AVEC UN CRITERE THERMIQUE DE BON FONCTIONNEMENT DES FUSIBLES. EN SECOND LIEU, NOUS AVONS ANALYSE LES PERTURBATIONS ENGENDREES PAR LE FUSIBLE SUR LE CONVERTISSEUR. CELLES-CI SE TRADUISENT PRINCIPALEMENT PAR L'INTRODUCTION D'UNE INDUCTANCE SUPPLEMENTAIRE DANS LE CIRCUIT, LAQUELLE POUVANT ETRE NEFASTE AU FONCTIONNEMENT DU CONVERTISSEUR. NOUS AVONS PROPOSE QUELQUES REGLES DE CONCEPTION PERMETTANT DE REDUIRE L'INDUCTANCE RAJOUTEE.
Download or read book Conference Record Industry Applications Society IEEE IAS Annual Meeting 1981 written by IEEE Industry Applications Society and published by . This book was released on 1999 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dictionary of Acronyms and Technical Abbreviations written by Jakob Vlietstra and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Dictionary covers information and communication technology (ICT), including hardware and software; information networks, including the Internet and the World Wide Web; automatic control; and ICT-related computer-aided fields. The Dictionary also lists abbreviated names of relevant organizations, conferences, symposia and workshops. This reference is important for all practitioners and users in the areas mentioned above, and those who consult or write technical material. This Second Edition contains 10,000 new entries, for a total of 33,000.
Download or read book Oral History Collections written by Ruth McMullin and published by New York : Bowker. This book was released on 1975 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Doing Oral History written by Donald A. Ritchie and published by Oxford University Press, USA. This book was released on 2015 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doing Oral History is considered the premier guidebook to oral history, used by professional oral historians, public historians, archivists, and genealogists as a core text in college courses and throughout the public history community. The recent development of digital audio and video recording technology has continued to alter the practice of oral history, making it even easier to produce and disseminate quality recordings. At the same time, digital technology has complicated the preservation of the recordings, past and present. This basic manual offers detailed advice for setting up an oral history project, conducting interviews and using oral history for research, making video recordings, preserving oral history collections in archives and libraries, and teaching and presenting oral history.
Download or read book Civil Space Technology Initiative written by and published by . This book was released on 1990 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solder Joint Technology written by King-Ning Tu and published by Springer Science & Business Media. This book was released on 2007-07-27 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The European Union’s directive banning the use of lead-based (Pb) solders in electronic consumer products has created an urgent need for research on solder joint behavior under various driving forces in electronic manufacturing, and for development of lead-free solders. This book provides a comprehensive examination of advanced materials reliability issues related to copper-tin reaction and electromigration in solder joints, and presents methods for preventing common reliablity problems.
Download or read book Advanced Record System ARS written by United States. Automated Data and Telecommunications Service and published by . This book was released on 1977 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Newnes Electronics Assembly Handbook written by Keith Brindley and published by Elsevier. This book was released on 2016-06-30 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Newnes Electronics Assembly Handbook
Download or read book Nuclear Geophysics and Its Applications written by International Atomic Energy Agency and published by . This book was released on 1999 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report aims at providing background information and a comprehensive account of the nature of nuclear geophysics, its fundamentals, its objectives, its tools for investigation and its wide range of applications benefiting society and industry. It reviews the achievements and performance of nuclear geophysical measurements, particularly in applications to mining, industry and agriculture. It also analyses many of these important applications for their economic impact and updates the available information on nuclear geophysics by giving an account of the most relevant achievements and concepts introduced during recent years.
Download or read book DC Crane Control 2011 Reprint written by and published by . This book was released on 2011-06 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asset Depreciation Range ADR System written by United States. Department of the Treasury and published by . This book was released on 1971 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global Warming and Climate Change written by Emma Carlson Berne and published by Referencepoint Press. This book was released on 2008 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the world, the cause and impact of global warming and climate change is being passionately debated. While many claim that a climate crisis is imminent if greenhouse gases are not curbed, others argue that the effects have been overblown. Through objective overviews, primary sources, and full-color illustrations, this title will examine What Is Global Warming and Climate Change? What Are the Consequences of Global Warming? What Are the Controversies Surrounding Global Warming? What Are the Solutions for Global Warming?
