Influences of Permanent Magnets Temperature Characteristic on the Levitation Force of YBaCuO Bulk Superconductors

2011 ◽  
Vol 25 (4) ◽  
pp. 857-860 ◽  
Author(s):  
Xing-Yi Zhang ◽  
You-He Zhou ◽  
Jun Zhou
Keyword(s):  
Permanent Magnets ◽  
Levitation Force ◽  
Temperature Characteristic ◽  
Bulk Superconductors ◽  
Ybacuo Bulk

The Effect of the Distance between the Permanent Magnets on the Levitation Force in Hybrid Magnetic Levitation System

2013 ◽  
Vol 721 ◽  
pp. 278-281
Author(s):  
Jun Ma
Keyword(s):  
Permanent Magnet ◽  
Liquid Nitrogen ◽  
Permanent Magnets ◽  
Magnetic Levitation ◽  
Levitation Force ◽  
Liquid Nitrogen Temperature ◽  
Interaction Force ◽  
Bulk Superconductors ◽  
Levitation System ◽  
Magnetic Levitation System

t has been investigated that the interaction force in hybrid magnetic levitation systems with two GdBCO bulk superconductors and two permanent magnets system and a cubic permanent magnet (PM2) and a cubic permanent magnet (PM3) system in their coaxial configuration at liquid nitrogen temperature. The two single-domain GdBCO samples are of φ20mm and 10mm in thickness, the permanent magnet PM1 is of rectangular parallelepiped shape, the permanent magnets PM2 and PM3 are of cubic shape; the system placed on the middle of system and their coaxial configuration; It is found that the maximum levitation force decreases from 40.6N to 17.8N while the distance (Dpp) between the permanent magnets is increased from 0mm to 24mm and the distance (Dsp) between the two GdBCO bulk superconductors and a cubic permanent magnet PM3 is 0mm, The results indicate that the higher levitation force can be obtained by introducing PM-PM levitation system based on scientific and reasonable design of the hybrid magnetic levitation system, which is helpful for designing and constructing superconducting magnetic levitation systems.

Basic Analysis of Magnetic Field in High Temperature Bulk Superconductors

2007 ◽  
Vol 546-549 ◽  
pp. 2115-2118
Author(s):  
Jian Qing Yang ◽  
G.D. Chen ◽  
Xiao Yang Yuan ◽  
You Zhang Zhu
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Lorentz Force ◽  
Analytical Method ◽  
Critical State ◽  
Permanent Magnets ◽  
Levitation Force ◽  
Field Equations ◽  
Force Equation ◽  
Bulk Superconductors

The analysis of magnetic field in high temperature bulk superconductors is presented in this paper. The macroscopic field equations were constructed on the basis of the critical state model and levitation forces ware analyzed between permanent magnets (PM) and HTSC using analytical method. The levitation force between permanent magnets (PM) and HTSC calculation were obtained by using Lorentz force equation [1]. The analytical results show that the presented method is comparatively accurate by comparing the measured levitation forces and the calculation ones. Some relations between B(r, t) and levitation force’s hysteresis are investigated.

INFLUENCE OF WAITING TIME ON THE LEVITATION FORCE BETWEEN A PERMANENT MAGNET AND A SUPERCONDUCTOR

2008 ◽  
Vol 22 (07) ◽  
pp. 499-506 ◽  
Author(s):  
XING-YI ZHANG ◽  
YOU-HE ZHOU ◽  
JUN ZHOU
Keyword(s):  
Permanent Magnet ◽  
Liquid Nitrogen ◽  
Waiting Time ◽  
Levitation Force ◽  
Liquid Nitrogen Temperature ◽  
Zero Field ◽  
Bulk Superconductors ◽  
Growth Method ◽  
Ndfeb Permanent Magnet ◽  
Ybacuo Bulk

This paper describes the experimental results of the levitation force of single-grained YBaCuO bulk superconductors preparing by the top-seeded melt-growth method with different waiting time tw below an NdFeB permanent magnet. It was found that waiting time has large effects on the zero-field-cooled (ZFC) and field-cooled (FC) levitation force, and the levitation force shows aging characteristics at the liquid nitrogen temperature.

Magnetic Properties of YBaCuO Superconductors Fabricated Using Melt Growth

2019 ◽  
Vol 14 (12) ◽  
pp. 1660-1663
Author(s):  
Sang Heon Lee ◽  
Jin Hyuck Kim
Keyword(s):  
Magnetic Properties ◽  
Permanent Magnets ◽  
Magnetic Levitation ◽  
Diffusion Reaction ◽  
Energy Storage Devices ◽  
Melt Growth ◽  
Storage Devices ◽  
Bulk Superconductors ◽  
Grain Bulk ◽  
Ybacuo Bulk

YBa2Cu3O7–y (YBaCuO) superconductors used in energy storage devices are superconducting permanent magnets in bulk form. YBaCuO bulk superconductors are fabricated by interior seeded melt growth. Because the seed crystal growth is based on a slow diffusion reaction, long-term heat treatment is required to fabricate a single crystal in order to improve the magnetic properties of the bulk YBaCuO superconductor. We fabricated a single-grain bulk YBaCuO superconductor by controlling the distance between the seed and the upper surface of the YBaCuO bulk. The magnetic levitation force and trapped magnetic field were measured for the YBaCuO superconducting bulk. The correlation between the superconducting magnetic properties of the specimens and the microstructure of each crystallographic plane were evaluated.

scholarly journals The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

2018 ◽  
Vol 28 (5) ◽  
pp. 1-10 ◽  
Author(s):  
Antonio Morandi ◽  
Massimo Fabbri ◽  
Pier Luigi Ribani ◽  
Anthony Dennis ◽  
John Durrell ◽  
...  
Keyword(s):  
Permanent Magnets ◽  
Levitation Force ◽  
Ybco Bulk ◽  
Bulk Superconductors ◽  
Single Grain

Influence of shape and thickness on the levitation force of YBaCuO bulk HTS over a NdFeB guideway

2003 ◽  
Vol 384 (1-2) ◽  
pp. 159-162 ◽  
Author(s):  
Zhongyou Ren ◽  
Jiasu Wang ◽  
Suyu Wang ◽  
He Jiang ◽  
Min Zhu ◽  
...  
Keyword(s):  
Levitation Force ◽  
Ndfeb Guideway ◽  
Ybacuo Bulk

The relationship of levitation force between single and multiple YBCO bulk superconductors

2002 ◽  
Vol 371 (3) ◽  
pp. 219-223 ◽  
Author(s):  
W.M Yang ◽  
L Zhou ◽  
Y Feng ◽  
P.X Zhang ◽  
C.P Zhang ◽  
...  
Keyword(s):  
Levitation Force ◽  
Ybco Bulk ◽  
Bulk Superconductors ◽  
Relationship Of ◽  
The Relationship

Superconducting Properties of YBaCuO Bulk Superconductors

2019 ◽  
Vol 14 (12) ◽  
pp. 1755-1758 ◽  
Author(s):  
Sang Heon Lee
Keyword(s):  
High Temperature ◽  
Large Scale ◽  
High Temperature Superconductor ◽  
High Temperature Superconductivity ◽  
Liquid Nitrogen Temperature ◽  
Industrial Applications ◽  
Power Cables ◽  
Ceramic Superconductors ◽  
Bulk Superconductors ◽  
Ybacuo Bulk

The use of a high-temperature superconductor to manufacture products for commercialization requires a superconductor with a flexible function designed to meet the characteristics of each product. Appropriate mechanical properties need to be maintained to overcome the Lorenz force generated under high magnetic fields. Several studies focused on the improvement of superconductivity and the development of processing technology. However, high temperature superconductivity wires are not intended for large-scale applications at liquid nitrogen temperature (77 K). Recently, ceramic superconductors have been fabricated into bulk and thin films or wire rods for electric power applications; however, ceramics are hard to deform due to increased hardness, which is one of the biggest limitations of a superconductor, and a major obstacle to industrial applications. To overcome these limitations, a synthetic method for superconductivity to reduce the hardness of ceramic superconductor and prevent its degradation was proposed for applications such as superconductivity power cables and wires in energy and electric machines using superconductors.

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