Affiliations: [a] College of Civil Engineering and Mechanics, Lanzhou
University, Lanzhou, Gansu 730000, China | [b] School of Civil Engineering, Lanzhou Jiaotong
University, Lanzhou, Gansu 730070, China
Correspondence:
[*]
Corresponding author: Xian-Feng Zhao, doctor candidate, major in
electromagnetic solid mechanics. Tel.: +86 0931 8910340; Fax: +86 0931 8625576;
E-mail: [email protected], [email protected]
Abstract: The equilibrium height (EH) of a levitated permanent magnet (PM) is
investigated in an oscillation system composed of the PM and a high temperature
superconductor (HTS). Two kinds of initial quasi-static magnetization processes
are performed respectively, and then the EH is achieved after a damped
vibration of the PM. A peak value of the EH, associated with a transitional
magnetization height (TMH), is found for the first initial process. When the
magnetization height (MH) is less than the TMH, the EH increases with the
increasing of the MH nonlinearly. Otherwise the EH decreases linearly with the
MH. For the second initial magnetization process a minimum value of the EH is
also presented. The magnetic energy of the system is believed to be responsible
for these two different dependences.
Keywords: Equilibrium height, initial magnetization process, Preisach model, current distribution
