Magnetic Force Investigation of High-Tc Superconducting Bulk over Permanent Magnet Railway under Different Lateral Offsets with Experimental Methods

Abstract

<p align="justify"> <span><span style="font-family:Verdana;">The magnetic levitation transportation system is one of the potential applications of high-</span><i><span style="font-family:Verdana;">T</span></i>_{<span style="font-family:Verdana;">c</span>}<span style="font-family:Verdana;"> superconducting (HTS) maglev system. The prototype HTS magnetic levitation system is composed of one HTS bulk and a permanent magnet railway (PMR). The maglev transportation system performance is influenced by the maximum levitation force, the maximum guidance force and the maximum of external applied magnetic flux density. The applied magnetic field dis</span></span><span style="font-family:Verdana;">tribution also needs to be considered carefully. In the paper, the magnetic levitation force of cylindrical HTS bulk over PMR is experimentally studied. During the experiment, symmetrical PMR and Halbach PMR are used separately. The levitation force-gap loops of different lateral offset of the HTS bulk above PMRs are obtained experimentally. The re</span><span style="font-family:Verdana;">sults show that the HTS bulk levitation performance is tightly relative to the external applied magnetic field distribution. The maximum magnetic levitation forces of HTS bulk above symmetrical PMR decrease</span><span> </span><span style="font-family:Verdana;">linearly with the lateral offset increasing. When the lateral offset changes from 0 mm to 25 mm, the maximum magnetic levitation forces of HTS bulk above Halbach PMR increase</span><span> </span><span style="font-family:Verdana;">with the lateral offset increasing. When the lateral offset exceeds the center of the Hal</span><span style="font-family:Verdana;">bach PMR by 25 mm, the maximum force decreases rapidly with the increase of the lateral offset of the bulk sample.</span> </p

The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

“…However, by decreasing the temperature the phenomena becomes less evident and the profile of force measured during the subsequent descending and ascending runs become closer. All the phenomenology outlined in this section with reference to the ZFC case, as well as the one discussed in the next section for the FC case, is widely reported in the literature [10], [13], [21], [22]. Same phenomenology also applies for different SC materials, like MgB2 [14], [23].…”

Variation of Pinning Force Density Throughout the TSMG Y123 Superconductor with Location

“…Discovery of the high temperature superconductor (HTS) which offer a superconducting transition at the liquid nitrogen temperature have been lead to many studies on the usability of superconductors in both materials science and its engineering applications. It is essential to achieve high superconducting properties such as critical current density (Jc), critical transition temperature (Tc) and field trapping capabilities for the applications [1][2][3]. On the other hand the magnetic field penetrates in the form of vortices in the HTSs and vortices can move easily when the temperature approaches the Tc or when high fields are applied.…”