Rare Earth Free Permanent Magnets And Permanent Magnet Synchronous Motors
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| Author | : Marc Humphries |
| Publisher | : DIANE Publishing |
| Total Pages | : 18 |
| Release | : 2010-11 |
| Genre | : Science |
| ISBN | : 1437937985 |
Contents: (1) Intro.; (2) What are Rare Earth Elements (REE)?; (3) Major End Uses and Applications: Demand for REE; The Application of REE in National Defense; (4) Rare Earth Resources and Production Potential; Supply Chain Issues; Role of China; (5) Rare Earth Legislation in the 111th Congress: H.R. 4866, and S. 3521, the Rare Earths Supply-Chain Technology and Resources Transformation Act of 2010; H.R. 5136, the FY 2011 Nat. Defense Authorization Act; P.L. 111-84, the FY 2010 Nat. Defense Authorization Act; (6) Possible Policy Options: Authorize and Appropriate Funding for a USGS Assessment; Support and Encourage Greater Exploration for REE; Challenge China on Its Export Policy; Establish a Stockpile. Illustrations.
| Author | : Gianmario Pellegrino |
| Publisher | : Springer |
| Total Pages | : 142 |
| Release | : 2016-04-28 |
| Genre | : Technology & Engineering |
| ISBN | : 3319322028 |
This book offers an essential compendium on the analysis and design of synchronous motors for variable-speed applications. Focusing on synchronous reluctance and ferrite permanent-magnet (PM) synchronous reluctance machines, it provides a broad perspective on three-phase machines for variable speed applications, a field currently dominated by asynchronous machines and rare-earth PM synchronous machines. It also describes synchronous reluctance machines and PM machines without rare-earth materials, comparing them to state-of-the-art solutions. The book provides readers with extensive information on and finite element models of PM synchronous machines, including all relevant equations and with an emphasis on synchronous-reluctance and PM-assisted synchronous-reluctance machines. It covers ferrite-assisted machines, modeled as a subcase of PM-assistance, fractional slot combinations solutions, and a quantitative, normalized comparison of torque capability with benchmark PM machines. The book discusses a wealth of techniques for identifying machine parameters, with an emphasis on self-commissioning algorithms, and presents methods for automated machine design and optimization, including a software tool developed for this purpose. Addressing an important gap in the field of PM-less and less-PM electrical machines, it is intended as a self-contained reference guide for both graduate students and professional machine designers, and as a useful text for university courses on automated and/or optimized design of electrical machines and drives.
| Author | : Jihoon Park |
| Publisher | : |
| Total Pages | : 184 |
| Release | : 2016 |
| Genre | : Electronic dissertations |
| ISBN | : |
In this dissertation, basic and applied research programs are engaged that range from the fundamental magnetism and magnetic properties of ferro- and ferrimagnetic materials to the design and fabrication of rare earth (RE) free permanent and soft magnetic materials for an interior permanent magnet synchronous motor (IPMSM) (i.e., motor for electric vehicles and plug-in electric vehicles) and heat assisted magnetic recording media (HAMR) with 4 Tb/in2 information storage applications. The applied research program emphasizes the design and synthesis of new RE-free permanent magnetic materials and magnetic exchange coupled core(hard)-shell(soft) particles to achieve a high maximum energy product [(BH)max], and the design of an advanced IPMSM based on RE free permanent magnets. The electronic structures of hard magnetic materials such as Mn-Al, Mn-Bi, Mn-Bi-X, Fe-Pt, Fe-Pt-X, SrFe12O19, and SrFe12O19-X (X = transition elements) and soft magnetic materials such as nanocrystalline and Mn-B were calculated based on the density functional theory (DFT), and their exchange coupled magnetic properties with soft magnets were designed according to the size and shape of the particles. The calculated magnetic and electronic properties were used to obtain the temperature dependence of saturation magnetization Ms(T) and anisotropy constant K(T) within the mean field theory. Thereby, the temperature dependence of the maximum energy product [(BH)max(T)] is calculated using the calculated Ms(T) and K(T). The experimental approaches were based on chemical and ceramic processes to synthesize hard and soft magnetic materials. Prior to synthesis, material design parameters were optimized by first-principles calculations and micromagnetic simulations. Lastly, performance of RE-free MnAl, MnBi, SrFe12O19, and Alnico IPMSMs, designed with the finite element method (FEM), at 23 and 200 oC were evaluated and compared to a RE Nd Fe B IPMSM. The performance parameters include torque, efficiency, and power. It was found that the performance of the MnBi and Alnico IPMSM is comparable with the Nd-Fe-B IPMSM.
| Author | : Ekkes H. Brück |
| Publisher | : Elsevier |
| Total Pages | : 216 |
| Release | : 2020-11-29 |
| Genre | : Technology & Engineering |
| ISBN | : 0128210249 |
Handbook of Magnetic Materials, Volume 29, highlights new advances in the field, with this new volume presenting interesting chapters written by an international board of authors on topics such as spin-orbit torque. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in the Handbook of Magnetic Materials series
| Author | : Jacek F. Gieras |
| Publisher | : CRC Press |
| Total Pages | : 591 |
| Release | : 2009-08-25 |
| Genre | : Technology & Engineering |
| ISBN | : 1439859019 |
The importance of permanent magnet (PM) motor technology and its impact on electromechanical drives has grown exponentially since the publication of the bestselling second edition. The PM brushless motor market has grown considerably faster than the overall motion control market. This rapid growth makes it essential for electrical and electromechanical engineers and students to stay up-to-date on developments in modern electrical motors and drives, including their control, simulation, and CAD. Reflecting innovations in the development of PM motors for electromechanical drives, Permanent Magnet Motor Technology: Design and Applications, Third Edition demonstrates the construction of PM motor drives and supplies ready-to-implement solutions to common roadblocks along the way. This edition supplies fundamental equations and calculations for determining and evaluating system performance, efficiency, reliability, and cost. It explores modern computer-aided design of PM motors, including the finite element approach, and explains how to select PM motors to meet the specific requirements of electrical drives. The numerous examples, models, and diagrams provided in each chapter facilitate a lucid understanding of motor operations and characteristics. This 3rd edition of a bestselling reference has been thoroughly revised to include: Chapters on high speed motors and micromotors Advances in permanent magnet motor technology Additional numerical examples and illustrations An increased effort to bridge the gap between theory and industrial applications Modified research results The growing global trend toward energy conservation makes it quite possible that the era of the PM brushless motor drive is just around the corner. This reference book will give engineers, researchers, and graduate-level students the comprehensive understanding required to develop the breakthroughs that will push this exciting technology to the forefront.
| Author | : Jacques Lucas |
| Publisher | : Elsevier |
| Total Pages | : 407 |
| Release | : 2014-09-09 |
| Genre | : Technology & Engineering |
| ISBN | : 0444627448 |
High-technology and environmental applications of the rare-earth elements (REE) have grown dramatically in diversity and importance over the past four decades. This book provides a scientific understanding of rare earth properties and uses, present and future. It also points the way to efficient recycle of the rare earths in end-of-use products and efficient use of rare earths in new products. Scientists and students will appreciate the book's approach to the availability, structure and properties of rare earths and how they have led to myriad critical uses, present and future. Experts should buy this book to get an integrated picture of production and use (present and future) of rare earths and the science behind this picture. This book will prove valuable to.non-scientists as well in order to get an integrated picture of production and use of rare earths in the 21st Century, and the science behind this picture. - Defines the chemical, physical and structural properties of rare earths. - Gives the reader a basic understanding of what rare earths can do for us. - Describes uses of each rare earth with chemical, physics, and structural explanations for the properties that underlie those uses. - Allows the reader to understand how rare earths behave and why they are used in present applications and will be used in future applications. - Explains to the reader where and how rare earths are found and produced and how they are best recycled to minimize environmental impact and energy and water consumption.
| Author | : Keisuke Fujisaki |
| Publisher | : Springer Nature |
| Total Pages | : 431 |
| Release | : 2019-11-29 |
| Genre | : Technology & Engineering |
| ISBN | : 9813299061 |
This book focuses on how to use magnetic material usefully for electrical motor drive system, especially electrical vehicles and power electronics. The contents have been selected in such a way that engineers in other fields might find some of the ideas difficult to grasp, but they can easily acquire a general or basic understanding of related concepts if they acquire even a rudimentary understanding of the selected contents.The cutting-edge technologies of magnetism are also explained. From the fundamental theory of magnetism to material, equipment, and applications, readers can understand the underlying concepts. Therefore, a new electric vehicle from the point of view of magnetic materials or a new magnetic material from the point of a view of electric vehicles can be envisioned: that is, magnetic material for motor drive systems based on fusion technology of an electromagnetic field. Magnetic material alone does not make up an electric vehicle, of course. Other components such as mechanical structure material, semiconductors, fuel cells, and electrically conductive material are important, and they are difficult to achieve. However, magnetic material involves one of the most important key technologies, and there are high expectations for its use in the future. It will be the future standard for motor-drive system researchers and of magneticmaterial researchers as well. This book is a first step in that direction.
| Author | : S. Ganesh Kumar |
| Publisher | : John Wiley & Sons |
| Total Pages | : 836 |
| Release | : 2023-06-23 |
| Genre | : Science |
| ISBN | : 1119792894 |
POWER CONVERTERS, DRIVES AND CONTROLS FOR SUSTAINABLE OPERATIONS Written and edited by a group of experts in the field, this groundbreaking reference work sets the standard for engineers, students, and professionals working with power converters, drives, and controls, offering the scientific community a way towards combating sustainable operations. The future of energy and power generation is complex. Demand is increasing, and the demand for cleaner energy and electric vehicles (EVs) is increasing with it. With this increase in demand comes an increase in the demand for power converters. Part one of this book is on switched-mode converters and deals with the need for power converters, their topologies, principles of operation, their steady-state performance, and applications. Conventional topologies like buck, boost, buck-boost converters, inverters, multilevel inverters, and derived topologies are covered in part one with their applications in fuel cells, photovoltaics (PVs), and EVs. Part two is concerned with electrical machines and converters used for EV applications. Standards for EV, charging infrastructure, and wireless charging methodologies are addressed. The last part deals with the dynamic model of the switched-mode converters. In any DC-DC converter, it is imperative to control the output voltage as desired. Such a control may be achieved in a variety of ways. While several types of control strategies are being evolved, the popular method of control is through the duty cycle of the switch at a constant switching frequency. This part of the book briefly reviews the conventional control theory and builds on the same to develop advanced techniques in the closed-loop control of switch mode power converters (SMPC), such as sliding mode control, passivity-based control, model predictive control (MPC), fuzzy logic control (FLC), and backstepping control. A standard reference work for veteran engineers, scientists, and technicians, this outstanding new volume is also a valuable introduction to new hires and students. Useful to academics, researchers, engineers, students, technicians, and other industry professionals, it is a must-have for any library.
| Author | : Olga Arsenyeva |
| Publisher | : Springer Nature |
| Total Pages | : 480 |
| Release | : 2023-12-18 |
| Genre | : Technology & Engineering |
| ISBN | : 3031468775 |
This book offers a comprehensive review of smart technologies and provides perspectives on their applications in urban engineering. It covers a wide range of applications, from manufacturing engineering and transport logistics to information and computation technologies, providing readers with fresh ideas for future research and collaborations. The book showcases selected papers from the International Conference on Smart Technologies in Urban Engineering (STUE-2023), hosted by O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine. The conference, held on June 8–10, 2023, aimed to address the complex rehabilitation of areas damaged by military conflicts and natural disasters. The contributions within this book offer a wealth of valuable information, fostering a meaningful exchange of experiences among scientists in the field of urban engineering. By delving into this book, readers explore innovative approaches to tackle urban challenges, gain insights from experts, and contribute to the advancement of smart technologies for the betterment of cities worldwide.
| Author | : Ali Ghasemi |
| Publisher | : Elsevier |
| Total Pages | : 658 |
| Release | : 2022-06-16 |
| Genre | : Technology & Engineering |
| ISBN | : 0128240156 |
As a fast-emerging and growing class of magnetic materials, ferrites have generated an increasing amount of interest for providing specific magnetic properties through controlled mixture in composites. The study of magnetic ferrite nanocomposites requires a multidisciplinary approach, involving novel synthesis techniques and an understanding of solid-state physics, electronic engineering, and material science. Magnetic Ferrites and Related Nanocomposites covers recent trends of various types of ferrite nanocomposites and evaluating the mechanisms for interpreting static and dynamic magnetic properties. Sections cover the fundamentals of magnetism, introducing different kinds of ferrites, ferrite characterization techniques, magneto-electric ferrite nanocomposites, exchange spring ferrite nanocomposites, shielding effectiveness and microwave absorption characteristics of ferrite-carbon materials, photocatalytic application of ferrite nanocomposites, and novel synthesis techniques for fabricating ferrite in nanoparticles, bulks, thin films, and nanofiber configurations. This book is an important reference for scientists, researchers, graduate students, and practitioners active in this field in order to broaden their understanding of ferrite nanocomposites and their impact on modern technology. - Provides background information regarding various basic magnetic phenomena and related theories, and defines the different natures of magnetic materials - Covers a wide range of hard and soft ferrites and related nanocomposites, particularly focusing on the correlation between structural features and magnetic analysis - Explores the role of substituted cations on the structural, thermal, magnetic, and microwave characteristics of ferrites and their nanocomposites - Discusses the mechanism involved for magnetic properties of major types of ferrite-ferroelectric magneto-electric components, exchange spring ferrite nanocomposites for fabricating next-generation permanent magnets, ferrite carbon nanocomposites for suppressing high-frequency electromagnetic radiation, and ferrite photocatalysts for omitting pollutants from our environment - Assesses the major challenges of experimental characterization and novel manufacturing techniques for fabrication of high quality ferrite, in terms of purity, shape, size, and distribution, and the application on an industrial scale
