HTS Magnetic Bearings in Prototype Application

• Published in: IEEE transactions on applied superconductivity Vol. 20; no. 3; pp. 874 - 879
• Main Authors: Werfel, Frank N, Floegel-Delor, Uta, Riedel, Thomas, Rothfeld, Rolf, Wippich, Dieter, Goebel, Bernd
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Bearings; Cooling; Cryostats; Density; Design engineering; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electromagnets; Electronics; Energy accumulation; Exact sciences and technology; Flywheel; Flywheels; General (including economical and industrial fields); High temperature superconductors; HTS magnetic bearing; Machinery; MAGLEV; Magnetic bearings; Magnetic levitation; Magnetic properties; Magnetic semiconductors; Miscellaneous; Modular; Power system reliability; Prototypes; Semiconductors; Superconducting magnetic energy storage; Superconductivity; Various equipment and components; Prototype; Cooling; Flywheel; Thermal management (packaging); Thermal insulation; Spacing; Energy storage system; MAGLEV; Magnetically levitated vehicle; Load capacity; Linear system; Kinetic energy storage; Electronics industry; Magnetic bearing; Magnetic coupling; High speed; Cooling system; Cryostat; Rail transportation; HTS magnetic bearing; Wafer; High temperature superconductor; Energy storage; Magnetic properties
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2010.2040261

ATZ Company has successfully developed high temperature superconducting (HTS) magnetic bearings for power energy application and high-speed machinery. Journal-type design and improved HTS magnetic properties increasingly fulfill industrial prototype requirements. Maximum load up to 1.1 ton, stiffnesses in 3-4 kN/mm level, simultaneous self-stabilization in axial and radial directions, largegap operation of 5-6 mm and reliable machine cooling in the 50-60 K region characterize the present progress of HTS magnetic bearings. A 200 mm HTS bearing of 10 kN load capacity is fabricated and integrated in a 5 kWh/250 kW flywheel energy storage system. We report about a new large-gap HTS magnetic coupling system ensuring 300 mm wafer treatment inside a closed processing chamber in semiconductor industry. A linear MAGLEV transport system consisting of four modular cryostat units have been recently fabricated in a prototyping process. The four HTS cryostats can carry almost 1 ton at 10 mm magnetic gap above a magnetic guideway with a force density of about 5 N/cm 2 . Due to perfect thermal insulation each cryostat operates more than 24 hours without refilling LN 2 .