Experimental Characterization of the Temperature Influence on the Stiffness and Damping of a Field-Cooled Superconducting Magnetic Suspension
| Autor: | Fernando Rodriguez-Celis, Cristian Cristache, Ignacio Valiente-Blanco, Jose-Luis Perez-Diaz, Juan Sanchez-Garcia-Casarrubios |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Superconductivity
Materials science Bearing (mechanical) Magnetic bearing Electromagnetic suspension Superconducting magnet Mechanics Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention Thrust bearing law Condensed Matter::Superconductivity 0103 physical sciences Levitation Electrical and Electronic Engineering 010306 general physics Magnetic levitation |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 29:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2019.2915310 |
| Popis: | Superconducting magnetic levitation has been used in contactless mechanical components for different applications like bearings or positioning devices. This technology is currently being investigated for its potential use as a vibration isolation and thermal disconnect passive mechanism to support the focal plane array of the ESA ATHENA scientific telescope. Although it is well known that superconducting levitation properties depends on temperature, theoretical models have difficulties with complex bearing geometries or capturing inhomogeneity in material properties. In addition, experimental studies focused on the characterization of the mechanical properties of superconducting magnetic bearings are scant and mostly carried out with zero-field-cooled thrust bearing configurations. In order to increase the maturity of the technology for its potential use in space applications, further experimental research of the superconducting levitation properties at different temperatures is required. In this paper, we present the results of an experimental study of the levitation mechanical properties of a journal superconducting suspension in a high vacuum and temperatures from 90 to 12 K. Axial stiffness quadratically increases at lower temperature and linearly in the radial direction. However, the hysteresis loss factor decreases when decreasing the temperature for both axial and radial directions of displacement. These results demonstrate that the temperature influence on superconducting levitation systems is significant, and thus, mechanical engineers must consider it for design of superconducting levitation systems subjected to temperature variations. |
| Databáze: | OpenAIRE |
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