SCHULTZ Ludwig Leibniz Institute for Solid State and Materials Research Dresden

High Temperature Superconductors and their Application for Levitation

New means of urban transportation and logistics will become realistic with superconducting magnetic bearings using nanostructured bulk high temperature superconductors. Superconducting magnetic levitation works passively stable without any electronic control but with attracting and repelling forces to suspend a vehicle pendant or standing upright from zero to high speed - perfect conditions for the idea of rail-bound individual transport with cabins for 4 - 5 passengers called on demand only. They will levitate noiseless over the track made of RE permanent magnets to the chosen destination saving energy and travel time. A big step forward to this vision can be tested at Dresden. The world largest research and test facility for transport systems using HTS bulk material in the levitation and guidance system in combination with a permanent magnet track was put into operation. A vehicle for 2 passengers, equipped with linear drive propulsion, non-contact energy supply, second braking system and various test and measurement systems is running on an 80 m long oval driveway. In the presentation the superconducting materials as well as the principle of superconducting levitation by flux pinning in high temperature superconductors will be described. An overview of the SupraTrans II research facility and future directions of superconductivity-based magnetic levitation and bearing for automation technology and transportation will be given.