High – Speed Wheel Systems with HTS Bearings for Electric Power Applications

  1. Dr. K. Grassie2,
  2. Prof. Dr. E. Teuckhoff3,
  3. Prof. Dr. G. Wegner4,
  4. Prof. Dr. J. Hausselt5 and
  5. Prof. Dr. H. Hanselka6
  1. Frank N. Werfel

Published Online: 27 APR 2006

DOI: 10.1002/3527607420.ch22

Functional Materials, Volume 13

Functional Materials, Volume 13

How to Cite

Werfel, F. N. (2000) High – Speed Wheel Systems with HTS Bearings for Electric Power Applications, in Functional Materials, Volume 13 (eds K. Grassie, E. Teuckhoff, G. Wegner, J. Hausselt and H. Hanselka), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607420.ch22

Editor Information

  1. 2

    Philips Forschungslaboratorium, Postfach 500145, 52085 Aachen, Germany

  2. 3

    Siemens AG, Postfach 3240, 91050 Erlangen, Germany

  3. 4

    Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany

  4. 5

    Forschungszentrum Karlsruhe, Postfach 3640, 76201 Karlsruhe, Germany

  5. 6

    Institut für Mechanik, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39160 Magdeburg, Germany

Author Information

  1. Adelwitz Technologiezentrum GmbH (ATZ), Rittergut Adelwitz, D-04886 Adelwitz, Germany

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527302543

Online ISBN: 9783527607426



  • functional materials;
  • high-speed wheel systems with HTS bearings;
  • electric power applications


Fast rotating wheel assemblies with passive high temperature superconducting magnetic bearings (SMB) have been developed with magnetic suspension and radial centering of the rotors. Due to air friction the speed of a 4 cm rotor is limited to about 90 000 rpm and higher than 105 rpm under vacuum conditions. Measurements of bearing properties and wheel performance are presented. Among several advantages of SMB, this concept does not limit the rotation speed at the level of the bearings. With v = 560 m/s circumference velocity the rotors are designed to accept high stresses to maximize the profit of the high rotation speed and to open the possibility of kinetic energy storage using flywheel energy storage systems. The double-bearing construction increases the maximum wheel imbalance relative to commercial one by a factor of five.

It is concluded that the superconducting magnetic bearings with integrated cooling devices are capable of providing reliable, long-life operation in high-speed rotating machines.