Abstract
In the study of high temperature superconducting maglev, the analysis of the forces acted on a high temperature superconductor (HTS) bulk is a basic issue, which can directly reflect the levitation and guidance performances of an HTS maglev system. In previous studies, the electromagnetic guideway was verified to be an alternative guideway type for HTS maglev. Recently, we carried out experimental and simulation work to investigate how a field cooled HTS bulk to interact with a reversed magnetic field. An E-type electromagnet is used to generate the required magnetic field. During the field reversing, forces acted on the HTS bulk were measured with a 3D force measuring system. In this paper, the forces on an HTS bulk in a reversed magnetic field are analyzed according to the experimental data and the results of finite element simulation. The magnetized status of a field cooled HTS bulk in a reversed magnetic field is discussed with a two region supposition. The influences of a reversed magnetic field on HTS maglev are summarized. These results may be of great significance not only for further study of HTS maglev, but also for some other applications, such as superconducting magnetic bearing and superconducting magnetic shielding.
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