Magnetic Bearings

  • G. Schweitzer
Part of the International Centre for Mechanical Sciences book series (CISM, volume 297)


Magnetic bearings have some distinct advantages. They do not generate wear and they do not need lubrication. These features make them attractive for vacuum applications. And their dynamic behaviour can be adjusted in a wide range, which allows active vibration damping and control.

This chapter presents the state of the art for the design of an electromagnetic bearing system. It introduces first the main elements and then discusses control and system aspects. Models for describing an elastic rotor and its active vibration control are included. The characteristics and the losses of such a suspension system are detailed.

Several applications are demonstrated, and future trends are indicated.


Rigid Rotor Centrifugal Compressor Magnetic Bearing Bearing System Active Vibration Control 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. /BL 84/.
    Bleuler, H.: Decentralized control of magnetic rotor— bearing systems. Diss. ETH Zurich No. 7573, 1984.Google Scholar
  2. /BR 39/.
    Braunknecht, W.: Freischwebende Körper im elektrischen und magnetischen Feld. Zeitschr. f. Physik, 1939, S. 753–763.Google Scholar
  3. /BU 85/.
    Bucher, Ch.: Contributions to the modeling of flexible structures for vibration control. Diss. ETH Zurich, No. 7700, 1985.Google Scholar
  4. /BY 46/.
    Beams, J.W., Young, J.L., and J.W. Moore: The production of high centrifugal fields. J. Appl. Phys., 1946, pp. 886–890.Google Scholar
  5. /GH 84/.
    Gondhalekar, V., and R. Holmes: Design of electromagnetic bearing for vibration control of flexible transmission shaft. NASA Conf. Publ. 2338, 1984.Google Scholar
  6. /GO 84/.
    Gottzein, E.: Das “Magnetische Rad” als autonome Funktionseinheit modularer Trag— und Führsysteme für Magnetbahnen. Fortschr.Ber. VDI—Z., R.B. Nr. 68, Düsseldorf VDI—Verlag, 1984.Google Scholar
  7. /HB 85/.
    Habermann, M., and M. Brunet: The active magnetic bearing enables optimum control of machine vibrations. ASME Paper 85-GT-22, Gas Turbine Conf. Houston, March 1985.Google Scholar
  8. /HK 85/.
    Hustak, J., Kirk, G.R., and K.A. Schoeneck: Active magnetic bearings for optimum turbomachinery design. Symp. on Instability in Rotating Machinery, Carson City, June 1985, NASA Conf. Publ. 2409.Google Scholar
  9. /MA 82/.
    MADYN-Handbuch, Krämer Klement, TH-Darmstadt, 1982.Google Scholar
  10. /PW 82/.
    Pietruszka, W.D., and N. Wagner: Aktive Beeinflussung des Schwingungsverhaltens eines magnetisch gelagerten Rotors. VDI—Bericht Nr. 456, 1982.Google Scholar
  11. /SA 84/.
    Salm, J., and G. Schweitzer: Modeling and control of a flexible rotor with magnetic bearings. Conf. on Vibrations in Rotating Machinery, Inst. of Mech. Eng., York, 1984, pp. 553–561.Google Scholar
  12. /SC 85/.
    Szczygielski, W., and G. Schweitzer: Dynamics of a highspeed rotor touching a boundary. IUTAM/IFToMM-Symp. on Multibody Dynamics, CISM Udine, Sept. 1985, Springer-Verlag, 1986.Google Scholar
  13. /SL 76/.
    Schweitzer, G., and R. Lange: Characteristics of a Magnetic Rotor Bearing for Active Vibration Control. Conf. on Vibrations in Rotating Machinery, Inst. of Mech. Eng., Cambridge, U.K., 1976.Google Scholar
  14. /ST 83/.
    Schweitzer, G., Traxler, A., Bleuler, H., Bauser, E., und P. Koroknay: Magnetische Lagerung einer Epitaxiezentrifuge bei Hochvakuumbedingungen. Vakuumtechnik 32 (1983), S. 70–74.Google Scholar
  15. /TM 84/.
    Traxler, A., Meyer, F., and H.P. Murbach: Fast digital control of a magnetic bearing with a microprocessor. 11. Internat. Congr. Microelectronics, Munich, Nov. 1984.Google Scholar
  16. /TR 85/.
    Traxler, A.: Eigenschaften und Auslegung berührungsfreier elektromagnetischer Lager. Diss. ETH Zürich No. 7851, 1985.Google Scholar

Copyright information

© Springer-Verlag Wien 1988

Authors and Affiliations

  • G. Schweitzer
    • 1
  1. 1.Institute for MechanicsETH ZurichSwitzerland

Personalised recommendations