Abstract
Magnetic forces of a cylinder shape bulk high-temperature superconductor (HTS) over a permanent magnet guideway (PMG) are studied mathematically. One cylindrical bulk HTS with a diameter of 30 mm and 15 mm in height is used. Two types of PMG are employed for external magnetic fields consideration. The relationship of magnetic forces of bulk HTS under different lateral offsets over PMG is studied with 3D-model finite element method (FEM). The calculation results show that the maximum magnetic levitation force of bulk HTS over PMG is tightly related to the applied magnetic field distribution. For the symmetrical PMG, the maximum magnetic levitation force decreases linearly with the increase of lateral offset of the bulk sample. For the Halbach PMG, when lateral offset changes from 0 mm to 25 mm, the maximum magnetic levitation force increases with the increase of lateral offset of the bulk HTS. When the lateral offset exceeds the center of the Halbach by 25 mm, the maximum levitation force decreases rapidly with the increase of the lateral offset of the bulk sample.
Highlights
Since the discovery of bulk high temperature superconductor (HTS) which can stably levitate above permanent magnet (PM), the magnetic levitation transportation system has attracted many researchers focus on its potential application [1, 2]
The simulation results show that the maximum value of magnetic levitation forces of different lateral offsets of bulk HTS over permanent magnet guideway (PMG) is tightly related to the applied magnetic field distribution
The simulation results show that the levitation force will decrease monotonously with the increase of lateral offset of the bulk HTS over symmetrical PMG
Summary
Since the discovery of bulk high temperature superconductor (HTS) which can stably levitate above permanent magnet (PM), the magnetic levitation transportation system has attracted many researchers focus on its potential application [1, 2]. Zhang experimentally researched the magnetic levitation force relaxation characteristics of bulk HTS over PM under different temperatures [8]. The maximum magnetic force is tightly related with bulk HTS critical current density, flux pinning ability, and the peak value of applied magnetic fields. How to arrange the bulk HTS arrays above the PMG and the magnetic field distribution induced by the PMG needs to be investigated. The simulation results show that the maximum value of magnetic levitation forces of different lateral offsets of bulk HTS over PMG is tightly related to the applied magnetic field distribution. For the symmetrical PMG, the maximum value of magnetic levitation forces decreases linearly with the lateral offset increasing of the bulk HTS. When the lateral offset exceeds the center of the Halbach by 25 mm, the maximum value decreases rapidly with the increase of the lateral offset of the bulk sample
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
