NDLI: Magnetic bearings: fifty years of progress

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Magnetic bearings: fifty years of progress

Content Provider	NASA Technical Reports Server (NTRS)
Author	Swann, Michael K.
Copyright Year	1993
Description	Magnetic bearings are just beginning to be flown in spacecraft systems, but their development spans more than 50 years. The promise of completely noncontacting, unlubricated rotating systems operating at speeds substantially beyond the range of conventional bearings, and with no wear and virtually no vibration, has provided the incentive to develop magnetic bearing technology for many diverse applications. Earnshaw theorized in 1842 that stable magnetic suspension is not possible in all three spatial directions unless the magnetic field is actively controlled. Since that time, researchers have attempted to successfully support spinning rotors in a stable manner. Development of magnetic suspension systems over the past fifty years has included progress on both passive (permanent magnet) and active (electromagnet) systems. The improvements in bearing load capacity, stiffness, and damping characteristics are traced. The trends in rotor size, rotational kinetic energy, and improvements in active control systems capabilities are also reviewed. Implications of superconductivity on suspension system design and performance are discussed.
File Size	948647
Page Count	20
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930018367
Archival Resource Key	ark:/13960/t1ck39w4s
Language	English
Publisher Date	1993-01-01
Access Restriction	Open
Subject Keyword	Mechanical Engineering Spacecraft Equipment Rotor Blades Turbomachinery Superconductors Materials Electromagnets Permanent Magnets Magnetic Bearings Magnetic Fields Active Control Magnetic Suspension Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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