Article ID Journal Published Year Pages File Type
1820002 Physica C: Superconductivity and its Applications 2007 4 Pages PDF
Abstract

Superconducting maglev vehicle system requires that the surface magnetic field of the guideway is uniform along the forward direction. But in practice the surface magnetic field of the NdFeB permanent magnet guideway is not always immutable. So the HTS bulks in this case are exposed to AC external magnetic field, which may induce the energy loss in the bulk and influence the guidance force between the HTS bulks and the NdFeB guideway. In this paper, we experimentally studied the influence of the AC external magnetic field perturbation on the guidance force of a HTS bulk over the NdFeB guideway. The experimental results showed that the guidance force was influenced by the application of the AC external magnetic. The guidance fore hysteresis became more evident with the amplitude of the AC field and was independent of the frequency in the range 90–400 Hz. We attributed the reason to magnetic hysteresis loss in the superconductor.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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