Title :
Calculation of the Torque on a Permanent Magnet Rotating in a Conducting Tube
Author :
Preis, K. ; Biro, O. ; Ticar, I.
Author_Institution :
IGTE, Graz Univ. of Technol.
fDate :
April 30 2006-May 3 2006
Abstract :
The aim of the present paper is to investigate the behavior of a permanent magnet rotating inside a conducting tube of finite length. Especially, the linearity of the dependence of the torque acting on the magnet due to the eddy currents induced in the tube on the number of revolutions per minute is of interest. The movement of the conductor relative to the magnet is taken into account by a Minkowsky transformation. The resulting non symmetrical equations system is solved by a biconjugate gradient method. The calculations have been verified by comparison with a time stepping method and with measurements
Keywords :
conducting materials; conjugate gradient methods; eddy currents; permanent magnets; pipes; torque; Minkowsky transformation; biconjugate gradient method; conducting tube; eddy currents; finite length; magnet; nonsymmetrical equations system; permanent magnet rotating; time stepping method; torque; Computer science; Conductors; Current density; Eddy currents; Equations; Gradient methods; Linearity; Permanent magnets; Time measurement; Torque;
Conference_Titel :
Electromagnetic Field Computation, 2006 12th Biennial IEEE Conference on
Conference_Location :
Miami, FL
Print_ISBN :
1-4244-0320-0
DOI :
10.1109/CEFC-06.2006.1632966