Magnetism

Comparative analysis of the magnetic force characteristics of the permanent magnet- and superconducting ribbon-based magnetic lines

A. I. Podlivaev^ab, I. A. Rudnev<sup>ac

a</sup> National Engineering Physics Institute "MEPhI", Москва, Россия
^b Research Institute for the Development of Scientific and Educational Potential of Youth, Moscow
^c University of Science and Technology "Sirius", Sochi, Russia

Abstract: The characteristics of maglev systems of two types with a gradient magnetic field induced by different methods are theoretically investigated. In the first case, the gradient magnetic field in a magnetic field source–superconductor system is induced by a magnetic line (set) consisting of NdFeB permanent magnets. In the second case, the magnetic line is a set of high-temperature superconductor ribbons magnetized by an external field and acting as a gradient field source. The calculation has shown that, at liquid nitrogen temperature, the HTS ribbon stack-based magnetic lines are inferior in efficiency to the sets of permanent magnets with magnetic line periods of up to 38 mm. At a larger period, the HTS ribbon stack-based magnetic lines are more efficient. In addition, it is shown that the efficiency of the HTS ribbon stack-based magnetic lines sharply increases with a decrease in temperature.

Keywords: superconductor, critical current, GdBaCuO magneto-levitation systems.

Received: 28.04.2021
Revised: 28.04.2021
Accepted: 11.05.2021

DOI: 10.21883/FTT.2021.10.51398.100

 English version: Physics of the Solid State, 2021, 63:12, 1757–1764

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