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.

fYear

2006

fDate

April 30 2006-May 3 2006

Firstpage

174

Lastpage

174

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Field Computation, 2006 12th Biennial IEEE Conference on

Conference_Location

Miami, FL

Print_ISBN

1-4244-0320-0

Type

conf

DOI

10.1109/CEFC-06.2006.1632966

Filename

1632966