Application of high temperature superconductors on levitation bearings, torque transmissions and vibration dampers

The transfer of momentum between a permanent magnet and a type II superconductor without mutual physical contact is the central theme behind many mechanical applications of the new class of high-temperature ceramic superconductors. The properties of this momentum transfer and its applications were s...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 1993-03, Vol.3 (1), p.388-391
Main Authors: Ma, K.B., McMichael, C.K., Lamb, M.A., Chu, W.K.
Format: Article
Language:English
Subjects:
Applied sciences
Bearings, bushings, rolling bearings
Ceramics
Couplings
Drives
Exact sciences and technology
High temperature superconductors
Machine components
Magnetic devices
Magnetic levitation
Magnetic materials
Mechanical engineering. Machine design
Permanent magnets
Shafts, couplings, clutches, brakes
Springs and dampers
Superconducting magnets
Torque
Type II superconductors
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Summary:The transfer of momentum between a permanent magnet and a type II superconductor without mutual physical contact is the central theme behind many mechanical applications of the new class of high-temperature ceramic superconductors. The properties of this momentum transfer and its applications were studied in a series of experiments as a proof of principle. The authors discuss the application of the force between permanent magnets and high-temperature superconductors (HTSs) in three different mechanical devices-a torque coupler, a magnetic bearing, and a vibration damper-based on the following two broad features of this forces. (1) A restoring force is generated by a piece of HTS material to oppose the motion of a magnet if and only if the magnet moves in such a way as to produce a change in the magnetic field in the space occupied by HTS material. (2) Back and forth cyclic motion of a magnet relative to a piece of HTS in the vicinity experiences hysteretic forces with loss of mechanical energy as a result. All the studies refer to melt-textured HTS material.< >
ISSN:1051-8223
1558-2515
DOI:10.1109/77.233726