The influence of inhomogeneous magnetic field over a NdFeB guideway on levitation force of the HTS bulk maglev system
•A new way to vary the amplitude of magnetic field over permanent guideway is proposed to discuss the effect of inhomogeneous magnetic field distribution of permanent magnet guideway on levitation performance.•The instantaneous levitation force is found to be depended on the variation rate of magnet...
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Published in | Physica. C, Superconductivity Vol. 547; pp. 41 - 45 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.04.2018
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | •A new way to vary the amplitude of magnetic field over permanent guideway is proposed to discuss the effect of inhomogeneous magnetic field distribution of permanent magnet guideway on levitation performance.•The instantaneous levitation force is found to be depended on the variation rate of magnetic field (dB/dt).•The decay of levitation force almost increases linearly with the increase of alternating magnetic field amplitude.
Dynamic responses of high temperature superconducting bulk to inhomogeneous magnetic field distribution of permanent magnet guideway, as well as enlarged amplitude of magnetic field obtained by partially covering the permanent magnet guideway (PMG) with iron sheets in different thickness, are investigated. Experiments show that the instantaneous levitation force increases with the increase of the variation rate of magnetic field (dB/dt). Meanwhile, inhomogeneous magnetic field from PMG causes the decay of levitation force. The decay of levitation force almost increases linearly with the increase of alternating magnetic field amplitude. It should be very important for the application of high-speed maglev system. |
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ISSN: | 0921-4534 1873-2143 |
DOI: | 10.1016/j.physc.2018.01.003 |