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Magnetic bearings for spacecraftMagnetic bearings have been successfully applied to motorized rotor systems in the multi-kilogram range, at speeds up to 1200 radians per second. These engineering models also indicated the need for continued development in specific areas to make them feasible for spacecraft applications. Significant power reductions have recently been attained. A unique magnetic circuit, combining permanent magnets with electromagnetic control, has a bidirectional forcing capability with improved current sensitivity. The multi-dimensional nature of contact-free rotor support is discussed. Stable continuous radial suspension is provided by a rotationally symmetric permanent magnet circuit. Two bearings, on a common shaft, counteract the normal instability perpendicular to the rotational axis. The axial direction is servoed to prevent contact. A new bearing technology and a new field of application for magnetics is foreseen.
Document ID
19730003772
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Studer, P. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1972
Subject Category
Machine Elements And Processes
Report/Patent Number
X-721-72-56
NASA-TM-X-66111
Accession Number
73N12499
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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