Magnetic flux penetration in high Tc superconducting bearing in zero-field cooling process

✍ Scribed by M. Komori; T. Matsushita; M. Takeo

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 542 KB
• Volume: 33
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(93)90106-x

✦ Synopsis

The properties of high T c superconducting bearings, consisting of a set of alternatingpolarity magnets and a superconductor, are studied in this paper. The superconducting bearing has a large surface area, contributing to levitation forces, and is zero-field cooled in liquid nitrogen. To investigate the mechanisms related to the levitation pressures of the superconducting bearing, the distribution of the magnetic flux density at the surface of the superconductor is studied. The results indicate that the magnetic flux density perpendicular to the superconductor plays an important role in flux penetration. The Maxwell stress tensor is applied to estimate the levitation pressure of a superconducting bearing with a large surface area and the results show that this method is applicable, to a certain extent, for such an estimation. This paper discusses the possibility of applying the Maxwell stress tensor to the estimation of the pressure.