Cross-coupling of Translational Motions of a Spinning Magnet above a High-T c Superconductor

Sugiura, Toshihiko; Matsunaga, Kimihiro; Uematsu, Yoshitaka; Aoyagi, Takaaki; Yoshizawa, Masatsugu

doi:10.1007/978-4-431-66879-4_318

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Cross Stiffness1

Bearing Dynamics1

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2000

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“…The PM/HTS system exhibits an anisotropic form of cross stiffness, which has only recently been investigated [38,65,66]. If the PM moves in the vertical direction, horizontal force is negligible.…”

Section: Cross Stiffnessmentioning

confidence: 99%

“…The dynamics of HTS bearings under the influence of the inherent nonlinear forces are still actively studied [65,143]. The cross-stiffness term in which the vertical force varies with radial displacement has been shown to cause a bifurcation of the solution for steady-state motion near the resonance [66], a prediction that has been verified by COF measurements [38]. A ramification of this result is that the torque needed to continue acceleration of the rotor requires a substantial step increase at a frequency slightly below the resonance peak.…”

Section: Bearing Dynamicsmentioning

confidence: 99%

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Superconducting bearings

Hull

2000

Supercond. Sci. Technol.

468

203

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The physics and technology of superconducting bearings is reviewed. Particular attention is given to the use of high-temperature superconductors (HTSs) in rotating bearings. The basic phenomenology of levitational forces is presented, followed by a brief discussion of the theoretical models that can be used for conceptual understanding and calculations. The merits of various HTS bearing designs are presented, and the behaviour of HTS bearings in typical situations is discussed. The article concludes with a brief survey of various proposed applications for HTS bearings.

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Section: Cross Stiffnessmentioning

confidence: 99%