Share

IIR document

Levitation and acceleration of a thermo-magnetic wheel.

Author(s) : PALMY C., EGOLF P. W.

Summary

A thin cylindrical permanent magnet is kept by levitation between the pole faces of two permanent magnets. Suitably placed diamagnetic bismuth plates make that Earnshaw's theorem does not apply and, therefore, stabilize the cylinder. The floating magnet, if locally heated at the upper surface, spontaneously starts to oscillate with increasing amplitude. After continuous heating the critical amplitude is reached and permanent rotation sets in. A thermodynamic model leads to the driving torque of a non-linear pendulum equation. An outlook of the application of this method to convert heat to mechanical/electrical energy is given.

Available documents

Format PDF

Pages: 2007-1

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Levitation and acceleration of a thermo-magnetic wheel.
  • Record ID : 2007-1408
  • Languages: English
  • Source: 2nd International Conference on Magnetic Refrigeration at Room Temperature
  • Publication date: 2007/04/11

Links


See other articles from the proceedings (48)
See the conference proceedings

Indexing