Research Progress of Magnetic Levitating Bearings and Some Advanced Technology
Research Progress of Magnetic Levitating Bearings and Some Advanced Technology

Author: Xi Ping Wang

Publisher: Trans Tech Publications Ltd

Published: 2012-01-03

Total Pages: 265

ISBN-13: 3038137294

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This collection of peer-reviewed papers covers innovations and practical experience in magnetic suspension systems and new magnetic bearing structures, all types of magnetic actuators, passive suspension, new measuring method and sensing technology, magnetic-field expertise and case studies, safety and reliability studies, key components and materials, modeling and identification, self-bearing (bearing-less) motors, self-sensing (sensor-less) techniques, low-loss magnetic bearings, superconductor magnetic bearings, micro-bearings and other novel research areas. This work will be invaluable to production and research engineers, research students and academics.

Research progress of magnetic levitating bearings and some advanced technology : selected, peer reviewed papers from the Fourth Chinese Symposium on Magnetic Bearings (CSMB-4, Mechatronics 2011), August 20 - 22, 2011
Research progress of magnetic levitating bearings and some advanced technology : selected, peer reviewed papers from the Fourth Chinese Symposium on Magnetic Bearings (CSMB-4, Mechatronics 2011), August 20 - 22, 2011

Author: Xiping Wang

Publisher:

Published: 2012

Total Pages: 0

ISBN-13: 9783037951644

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This collection of peer-reviewed papers covers innovations and practical experience in magnetic suspension systems and new magnetic bearing structures, all types of magnetic actuators, passive suspension, new measuring method and sensing technology, magnetic-field expertise and case studies, safety and reliability studies, key components and materials, modeling and identification, self-bearing (bearing-less) motors, self-sensing (sensor-less) techniques, low-loss magnetic bearings, superconductor magnetic bearings, micro-bearings and other novel research areas. This work will be invaluable to production and research engineers, research students and academics. Review from Book News Inc.: Drawn from papers presented at the Fourth Chinese Symposium on Magnetic Bearings held in Shanghai, China in August, 2011, this collection showcases current scholarship in a wide range of theoretical and practical topics related to electromagnetic bearing design and applications. The volume is divided into sections covering magnetic bearing theory, the design and development of magnetic suspension systems, and miscellaneous magnetic bearing applications, and individual essays address topics such as direct torque control of bearing-less synchronous reluctance motors, back-stepping nonlinear robust controllers for AMB spindles, and modal analysis of maglev linear feed units. Articles include keywords, abstracts, illustrations and formulas, and both keyword and author indexes are provided. Contributors are Chinese academics in engineering fields from a variety of institutions.

Magnetic Bearings
Magnetic Bearings

Author: Gerhard Schweitzer

Publisher: Springer Science & Business Media

Published: 2009-06-10

Total Pages: 541

ISBN-13: 3642004970

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Compiling the expertise of nine pioneers of the field, Magnetic Bearings - Theory, Design, and Application to Rotating Machinery offers an encyclopedic study of this rapidly emerging field with a balanced blend of commercial and academic perspectives. Every element of the technology is examined in detail, beginning at the component level and proceeding through a thorough exposition of the design and performance of these systems. The book is organized in a logical fashion, starting with an overview of the technology and a survey of the range of applications. A background chapter then explains the central concepts of active magnetic bearings while avoiding a morass of technical details. From here, the reader continues to a meticulous, state-of-the-art exposition of the component technologies and the manner in which they are assembled to form the AMB/rotor system. These system models and performance objectives are then tied together through extensive discussions of control methods for both rigid and flexible rotors, including consideration of the problem of system dynamics identification. Supporting this, the issues of system reliability and fault management are discussed from several useful and complementary perspectives. At the end of the book, numerous special concepts and systems, including micro-scale bearings, self-bearing motors, and self-sensing bearings, are put forth as promising directions for new research and development. Newcomers to the field will find the material highly accessible while veteran practitioners will be impressed by the level of technical detail that emerges from a combination of sophisticated analysis and insights gleaned from many collective years of practical experience. An exhaustive, self-contained text on active magnetic bearing technology, this book should be a core reference for anyone seeking to understand or develop systems using magnetic bearings.

Magnetic Bearings
Magnetic Bearings

Author: G. Schweitzer

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 387

ISBN-13: 3642517242

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Magnetic Bearings are bearings where the suspension forces are generated magnetically without any contact. The advantages to modern machinery are obvious: no mechanical wear, no lubrication, potential for high rotor speed, accuracy, and high dynamic performance, new constructional solutions to a classical problem in machine dynamics. The realization of such bearings is in rapid progress. Examples for application areas are turbomachinery, centrifuges, vacuum techniques, machine tool spindles, chemical industry, medical devices, robotics, high speed drives, spacecraft equipment, con tactless actuators, vibration isolation. The Symposium is demonstrating the current state of the art in this developing field of mechatronics, showing actual research efforts, reporting on applications in the various areas, and discussing open questions. The main purpose of the Symposium has been to establish a common information basis for people working on magnetic bearings. It will point to promising areas, and it will help to facilitate decisions on research and development projects, and on investments for applications.

Superconducting Levitation
Superconducting Levitation

Author: Francis C. Moon

Publisher: John Wiley & Sons

Published: 2008-09-26

Total Pages: 310

ISBN-13: 3527617531

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Presents the fundamental principles governing levitation of material bodies by magnetic fields without too much formal theory. Defines the technology of magnetic bearings, especially those based on superconductivity, and demonstrates the key roles that magnetics, mechanics and dynamics play in the complete understanding of magnetic levitation and its bearings. Features extensive figures and photos of Mag-Lev devices and summarizes recent U.S. research studies in an effort to regain the lead in Mag-Lev technologies.

Magnetic Bearings
Magnetic Bearings

Author: Gerhard Schweitzer

Publisher: Springer

Published: 2009-06-05

Total Pages: 535

ISBN-13: 9783642004964

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Compiling the expertise of nine pioneers of the field, Magnetic Bearings - Theory, Design, and Application to Rotating Machinery offers an encyclopedic study of this rapidly emerging field with a balanced blend of commercial and academic perspectives. Every element of the technology is examined in detail, beginning at the component level and proceeding through a thorough exposition of the design and performance of these systems. The book is organized in a logical fashion, starting with an overview of the technology and a survey of the range of applications. A background chapter then explains the central concepts of active magnetic bearings while avoiding a morass of technical details. From here, the reader continues to a meticulous, state-of-the-art exposition of the component technologies and the manner in which they are assembled to form the AMB/rotor system. These system models and performance objectives are then tied together through extensive discussions of control methods for both rigid and flexible rotors, including consideration of the problem of system dynamics identification. Supporting this, the issues of system reliability and fault management are discussed from several useful and complementary perspectives. At the end of the book, numerous special concepts and systems, including micro-scale bearings, self-bearing motors, and self-sensing bearings, are put forth as promising directions for new research and development. Newcomers to the field will find the material highly accessible while veteran practitioners will be impressed by the level of technical detail that emerges from a combination of sophisticated analysis and insights gleaned from many collective years of practical experience. An exhaustive, self-contained text on active magnetic bearing technology, this book should be a core reference for anyone seeking to understand or develop systems using magnetic bearings.

An Overview of Magnetic Bearing Technology for Gas Turbine Engines
An Overview of Magnetic Bearing Technology for Gas Turbine Engines

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-06-21

Total Pages: 28

ISBN-13: 9781721666249

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The idea of the magnetic bearing and its use in exotic applications has been conceptualized for many years, over a century, in fact. Patented, passive systems using permanent magnets date back over 150 years. More recently, scientists of the 1930s began investigating active systems using electromagnets for high-speed ultracentrifuges. However, passive magnetic bearings are physically unstable and active systems only provide proper stiffness and damping through sophisticated controllers and algorithms. This is precisely why, until the last decade, magnetic bearings did not become a practical alternative to rolling element bearings. Today, magnetic bearing technology has become viable because of advances in micro-processing controllers that allow for confident and robust active control. Further advances in the following areas: rotor and stator materials and designs which maximize flux, minimize energy losses, and minimize stress limitations; wire materials and coatings for high temperature operation; high-speed micro processing for advanced controller designs and extremely robust capabilities; back-up bearing technology for providing a viable touchdown surface; and precision sensor technology; have put magnetic bearings on the forefront of advanced, lubrication free support systems. This paper will discuss a specific joint program for the advancement of gas turbine engines and how it implies the vitality of magnetic bearings, a brief comparison between magnetic bearings and other bearing technologies in both their advantages and limitations, and an examination of foreseeable solutions to historically perceived limitations to magnetic bearing. Clark, Daniel J. and Jansen, Mark J. and Montague, Gerald T. Glenn Research Center NASA/TM-2004-213177, ARL-TR-3254, E-14672

Magnetic Bearings for Assist Devices
Magnetic Bearings for Assist Devices

Author: Stephen Day

Publisher: Momentum Press

Published: 2015-12-16

Total Pages: 63

ISBN-13: 1606509209

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This book introduces magnetic bearings--mechatronic devices that produce contact-free electromagnetic force to support a load, such as a moving train or a spinning rotor. Compared to traditional bearings, magnetic bearings offer several advantages: no friction, low heat generation, no required lubrication, quiet operation, and fast and stable rotation. For these reasons, magnetic bearings have been used in rotary ventricular assist devices (VADs) to increase design life, reduce or eliminate material wear and bearing maintenance, as well as to increase biocompatibility by eliminating high fluid stresses and heat generation, both of which are associated with hemolysis, platelet activation and aggregation, and thrombus growth. The book covers the principles of these bearings, how they are used in integrated control and electronics systems, and useful information on several major brands of current assist devices.

Superconducting Levitation: Applications to Bearing & Magnetic Transportation
Superconducting Levitation: Applications to Bearing & Magnetic Transportation

Author: Francis C. Moon

Publisher:

Published: 2004

Total Pages: 310

ISBN-13:

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This study presents the fundamental principles governing the levitation of material bodies by magnetic fields. It defines the technology of magnetic bearings, especially those based on superconductivity, and demonstrates the key roles that magnetics, mechanics and dynamics play in the complete understanding of magnetic levitation and its bearings. The text features extensive illustrations of MagLev devices and summarizes the recent US research studies carried out in an effort to regain the lead in MagLev technologies.

Development and Testing of an Axial Halbach Magnetic Bearing
Development and Testing of an Axial Halbach Magnetic Bearing

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-05-30

Total Pages: 30

ISBN-13: 9781720477266

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The NASA Glenn Research Center has developed and tested a revolutionary Axial Halbach Magnetic Bearing. The objective of this work is to develop a viable non-contact magnetic thrust bearing utilizing Halbach arrays for all-electric flight, and many other applications. This concept will help to reduce harmful emissions, reduce the Nation s dependence on fossil fuels and mitigate many of the concerns and limitations encountered in conventional axial bearings such as bearing wear, leaks, seals and friction loss. The Axial Halbach Magnetic Bearing is inherently stable and requires no active feedback control system or superconductivity as required in many magnetic bearing designs. The Axial Halbach Magnetic Bearing is useful for very high speed applications including turbines, instrumentation, medical systems, computer memory systems, and space power systems such as flywheels. Magnetic fields suspend and support a rotor assembly within a stator. Advanced technologies developed for particle accelerators, and currently under development for maglev trains and rocket launchers, served as the basis for this application. Experimental hardware was successfully designed and developed to validate the basic principles and analyses. The report concludes that the implementation of Axial Halbach Magnetic Bearings can provide significant improvements in rotational system performance and reliability.Eichenberg, Dennis J. and Gallo, Christopher A. and Thompson, William K.Glenn Research CenterMAGNETIC BEARINGS; THRUST BEARINGS; HIGH SPEED; MAGNETIC SUSPENSION; MAGNETIC FIELDS; PARTICLE ACCELERATORS; RELIABILITY; SPACECRAFT POWER SUPPLIES; MEMORY (COMPUTERS); ROTORS; STATORS; TURBINES