Levitation Force Characteristics of Magnetic Levitation Type Seismic Isolation Device Composed of Radial Arrangement of HTS Bulks and Permanent Magnets

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.

Download Full-text

Magnetic levitation force exerted on the cylindrical magnet in a ferrofluid damper

Journal of Vibration and Control ◽

10.1177/1077546315616516 ◽

2015 ◽

Vol 23 (14) ◽

pp. 2345-2354 ◽

Cited By ~ 5

Author(s):

Wenming Yang

Keyword(s):

Permanent Magnets ◽

Magnetic Levitation ◽

Levitation Force ◽

Radius Ratio ◽

Analytical Equation ◽

Bipolar Coordinates ◽

Magnetic Levitation Force

The levitation phenomenon of permanent magnets immersed in ferrofluid is the foundation of ferrofluid dampers. According to the model built using bipolar coordinates, the analytical equation describing the force exerted on the cylindrical magnets in ferrofluid dampers is obtained, which is different from that of the previous results. The analysis of the equation indicates that the magnetic levitation force increases with the eccentricity of the magnet, the radius of the magnet and the permeability of ferrofluid, respectively, when other factors are definite. As a result, we can increase the permeability of ferrofluid and decrease the radius ratio of the magnet and the tube to enhance the levitation stability.

Download Full-text

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.987 ◽

2013 ◽

Vol 750-752 ◽

pp. 987-990

Author(s):

Jun Ma

Keyword(s):

Permanent Magnet ◽

Permanent Magnets ◽

Magnetic Levitation ◽

Levitation Force ◽

Liquid Nitrogen Temperature ◽

Horizontal Distance ◽

Bulk Superconductor ◽

Magnet System ◽

Levitation System ◽

Magnetic Levitation System

It has been investigated that the interaction force in hybrid magnetic levitation systems with a GdBCO bulk superconductor and a permanent magnet system and two permanent magnets (PM2) and two cubic permanent magnets (PM3) system in their coaxial configuration at liquid nitrogen temperature. A single-domain GdBCO sample is of 20mm 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 46.3N to 16.3N while the horizontal distance (Dpp) between the rectangle permanent magnet and two cubic permanent magnets (PM2) is increased from 0mm to 24mm and the horizontal distance (Dsp) between a GdBCO bulk superconductor and two cubic permanent magnets (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.

Download Full-text