Handbook of Giant Magnetostrictive Materials

Author: Göran Engdahl
Publisher: Elsevier
ISBN: 9780080533605
Format: PDF, Docs
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Handbook of Giant Magnetostrictive Materials contains the knowledge that a mechanical or an electrical engineer needs when considering the use of magnetostrictive materials in a construction project. The book covers the physical origin of giant magnetostriction, its manufacturing and metallurgy, and grain related processes under operation. Comprehensive descriptions of useful models of design methods and tools are given, including the performance of devices and systems comprised of magnetostrictive materials, considering the electrical, magnetic, mechanical, and thermal effects. The book covers all major characterization methods of giant magnetostrictive bulk materials, actuators, and systems. A structured inventory of current and emerging applications of giant magnetostrictive materials is given, covering areas such as sound and vibration sources, vibration control, motional control, material processing, and electromechanical converters. The final chapter offers an up-to-date review of the emerging giant magnetostrictive thin film technologies. The book also contains a market inventory with valuable contact information. Offers all necessary information for the reader to decide on the applicability of giant magnetostrictive material in a construction Allows readers to create their own computational design tools based on the model algorithms given in the book; specific programs are also proposed Gives the reader numerous pieces of advice and hints regarding the further details of construction design, pre-and detail engineering Provides the reader with information necessary to perform the needed experimental evaluation of materials and actuators in specific applications Guides the reader through current and potential areas of successful applications of giant magnetostrive materials Supplies the reader with the necessary contact information to act in the field of giant magnetostrictive materials applications

Permanent Magnet and Electromechanical Devices

Author: Edward P. Furlani
Publisher: Elsevier
ISBN: 0080513697
Format: PDF, Kindle
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The book provides both the theoretical and the applied background needed to predict magnetic fields. The theoretical presentation is reinforced with over 60 solved examples of practical engineering applications such as the design of magnetic components like solenoids, which are electromagnetic coils that are moved by electric currents and activate other devices such as circuit breakers. Other design applications would be for permanent magnet structures such as bearings and couplings, which are hardware mechanisms used to fashion a temporary connection between two wires. This book is written for use as a text or reference by researchers, engineers, professors, and students engaged in the research, development, study, and manufacture of permanent magnets and electromechanical devices. It can serve as a primary or supplemental text for upper level courses in electrical engineering on electromagnetic theory, electronic and magnetic materials, and electromagnetic engineering.

Characterization and Measurement of Magnetic Materials

Author: Fausto Fiorillo
Publisher: Academic Press
ISBN: 0080528929
Format: PDF, Mobi
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Correct and efficient measurements are vital to the understanding of materials properties and applications. This is especially so for magnetic materials for which in last twenty years, our understanding and use have changed dramatically. New or improved materials have been created and have reached the market. The Soft amorphous alloys, the Fe-based rare-earth magnets and the giant magnetorestrictive and magnetoresistive materials have all posed challenges to measurement. At the same time new digital measurement techniques have forced a change in laboratory and commercial measuring setups. A revision of measuring standards also occurred in the 1990s with the result that there is now a lack of up-to-date works on the measurement of magnetic materials. The basic objective of this work is to provide a comprehensive overview of the properties of the hard and soft magnetic materials relevant to applications and of thoroughly discussing the modern methodologies for employed in the measurement of these properties. The balance of these topics results in a complete text on the topic, which will be invaluable to researchers, students and practitioners in industry. It will be of significant interest not only to scientists working in the fields of power engineering and materials science but also to specialists in measurement who be able to easily find all the information they need. Comprehensive overview of the properties of the hard and soft magnetic materials Provides applications and discusses thoroughly the modern methodologies for employed in the measurement of these properties Provides the latest up-to-date works on the measurement of magnetic materials

The Science of Hysteresis Hysteresis in materials

Author: Giorgio Bertotti
Publisher: Gulf Professional Publishing
ISBN: 9780123694331
Format: PDF, Docs
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This third volume of 'The Science of Hysteresis' deals with hysteresis phenomena in materials. It contains contributions on hysteresis of type II superconductors with sharp and gradual resistive transitions and hysteresis of piezoelectric and ferroelectric materials.

Numerical Methods in Electromagnetism

Author: M. V. K. Chari
Publisher: Academic Press
ISBN: 9780126157604
Format: PDF, Docs
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Electromagnetics is the foundation of our electric technology. It describes the fundamental principles upon which electricity is generated and used. This includes electric machines, high voltage transmission, telecommunication, radar, and recording and digital computing. This book will serve both as an introductory text for graduate students and as a reference book for professional engineers and researchers. This book leads the uninitiated into the realm of numerical methods for solving electromagnetic field problems by examples and illustrations. Detailed descriptions of advanced techniques are also included for the benefit of working engineers and research students. * Comprehensive descriptions of numerical methods * In-depth introduction to finite differences, finite elements, and integral equations * Illustrations and applications of linear and nonlinear solutions for multi-dimensional analysis * Numerical examples to facilitate understanding of the methods * Appendices for quick reference of mathematical and numerical methods employed

Handbook of Magnetic Materials

Author: K.H.J. Buschow
Publisher: Gulf Professional Publishing
ISBN: 9780444511447
Format: PDF, Docs
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Magnetoelectronics is a novel and rapidly developing field. This new field is frequently referred to as spin-electronics or spintronics. It includes spin-utilizing devices that need neither a magnetic field nor magnetic materials. In semiconductor devices, the spin of the carriers has only played a very modest role so far because well established semiconductor devices are non-magnetic and show only negligible effects of spin. Nanoscale thin films and multilayers, nanocrystalline magnetic materials, granular films, and amorphous alloys have attracted much attention in the last few decades, in the field of basic research as well as in the broader field of materials science. Such heterogeneous materials display uncommon magnetic properties that virtually do no occur in bulk materials. This is true, in particular with respect to surface (interface) magnetic anisotropy and surface (interface) magnetostrictive strains and giant magnetoresistance. The local atomic arrangement at the interface differs strongly from that in the bulk. The local symmetry is lowered, so that some interactions are changed or are missing altogether. The interface atoms may envisaged as forming a new phase and some properties characteristic of this phase may become predominant for the entire system. This becomes particularly evident in the case of interfacial magnetostriction which can lead to a decrease (almost to zero) or to an increase(over the bulk value) of the resulting magnetostriction of the nanoscale system. There are various forms of the interplay of magnetism and superconductivity, which can be divided into competition and coexistence phenomena. For instance, a strong competition is found in high-Tc cuprates. In these materials, depending on the doping rate, either Neel-type antiferromagnetism moments (e.g. from 4f-elements) with superconductivity is known to occur in systems where the concentration of these moments is sufficiently small or where they are antiferromagnetically ordered and only weakly coupled to the conduction electrons. During the years, intermetallic gadolinium compounds have adopted a special position in the study of 4f electron magnetism. The reason for this is the fact that the gadolinium moment consists only of a pure spin moment, orbital contributions to the moment being absent. As a consequence, gadolinium compounds have been regarded as ideal test benches for studying exchange interactions, free from complications due to crystal effects. Volume 14 of the Handbook of Magnetic Materials, as the preceding volumes, has a dual purpose. As a textbook it is intended to be of assistance to those who wish to be introduced to a given topic in the field of magnetism without the need to read the vast amount of literature published. As a work of reference it is intended for scientists active in magnetism research. To this dual purpose, volume 14 of the Handbook is composed of topical review articles written by leading authorities. In each of these articles an extensive description is given in graphical as well as tabular form, much emphasis being placed on the discussion of the experimental material in the framework of physics, chemistry and material science.

Automotive Electronics Handbook

Author: Ronald K. Jurgen
Publisher: McGraw Hill Professional
ISBN: 9780070344532
Format: PDF, Docs
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Bestselling auto electronics bible Brimming with the latest advances in auto electronics, Automotive Electronics Handbook, Second Edition makes you an instant expert on today's leading edge technologies--stability control, object detection, collision warning, adaptive cruise control, and more. Plus, you get under-the-hood engineering details on automotive antitheft systems, navigation aids, and intelligent vehicle-highway systems--completely updated for 21st century vehicle design. Nearly 50 well-known auto electronics gurus at firms ranging from Chrysler to Motorola hand you ready-to-use templates and powerful on-the-job shortcuts, taking you far beyond basic sensors and actuators for schematic-level working explanations of everything from front and side airbags, smart instrument displays and sleep warning systems to seat occupancy detectors, all-electric vehicles, electric hybrids and more. With hundreds of all-new design secrets and previews of emerging digital technologies, this exhaustive guide is the most comprehensive of its kind.

Robuste Regelung

Author: Jürgen Ackermann
Publisher: Springer-Verlag
ISBN: 366209777X
Format: PDF, Docs
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Robuste Regelung stellt einen für die praktische Umsetzung wichtigen Aspekt der Regelungstheorie dar. Sie gibt Auskunft, ob die Einschwingvorgänge linearer Regelsysteme rasch abklingen. Dies ist wichtig bei realen Systemen, bei denen sich starke Änderungen der Betriebsbedingungen einstellen, in der Praxis z.B. bei einem Kran mit variabler Seillänge oder Lastmasse, aber auch bei einem Flugzeug, das mit verschiedenen Geschwindigkeiten in verschiedenen Höhen fliegt. Robuste Regelung von Jürgen Ackermann liefert den neuesten Stand der Verfahren zur Robustheitsanalyse. Es werden Entwurfswerkzeuge (Parameterraum-Verfahren, Gütevektor-Optimierung) vorgestellt und auf die Regelung praktischer mechanischer Systeme aus Automobil- und Luftfahrttechnik angewendet. Angesprochen sind in erster Linie Ingenieure der Elektrotechnik und des Maschinenbaus.