Stable thrust on a finite-sized magnet above a Meissner superconducting torus

Abstract

Forces and torques exerted by a superconducting torus on a permanent magnet have been mapped. It is demonstrated that stable orbits exist. Moreover, provided that the magnet remains in any of these orbits, the first critical field in the superconductor is never overpassed and the superconductor remains in the Meissner state. The consequent absence of hysteresis makes these kinds of device perfect candidates for non-frictional bearings or gyroscopes. V C 2013 American Institute of Physics.

Design and analysis of a non-hysteretic passive magnetic linear bearing for cryogenic environments

“…It is also possible to obtain equilibrium levitation positions and direction working in a complete Meissner state. In order to achieve a stable and passive displacement direction, it is necessary to summarize some design rules for a magnet-superconductor mechanism in the Meissner state obtained from various literatures: [26][27][28][29][30][31] -A magnetic dipole is always repelled by a superconducting surface. -A magnetic dipole tends always to be oriented parallel to a superconducting surface.…”

Contactless Mechanical Components: Gears, Torque Limiters and Bearings

“…Superconducting Magnetic Bearings (SMBs) find application in many fields where lack of contact is a requirement or an advantage such as in flywheel systems and transportation [18], cryogenic turbine flow meters, cryocoolers and sensitive gyroscopes for space applications among other applications for cryogenic and space mechanisms [19][20][21][22][23][24][25]. Recently, it has been explored different shapes, sizes and combination of magnet-superconductor in order to obtain stable levitation positions [26][27][28][29][30][31]. There are some models that are useful to describe this interaction and that can be applied in finite elements programs as it is commonly used in mechanical engineering [32][33][34].…”

Modelling and Test of an Integrated Magnetic Spring-Eddy Current Damper for Space Applications

“…High performant magnetic systems appeared after the development of high magnetic 2 of 18 product magnets based on Nd-Fe-B alloys [8,9]. This type of new magneto-mechanisms have in common some unique features: cleanness, oil-free, reliability, low wear, no power consumption, long life, and low noise [10][11][12][13][14][15][16][17][18][19][20].…”