Explanation

The magnetic suspension is realized by using the diamagnetism of superconductors. When the superconductor is close to the permanent magnet, because the magnetic line of force cannot enter the superconductor, a large gradient of magnetic flux density is formed on the surface of the superconductor, which induces a high critical current and repels the permanent magnet. The repulsive force gradually increases with the decrease of relative distance, which can overcome the gravity of superconductors and suspend them at a certain height above the permanent magnet. A maglev train is a type of train that is propelled by magnetic levitation forces (i.e. magnetic attraction and repulsion).

Classification