An optimal formulation for 3D moving conductor eddy current problems with smooth rotors

Author

Rodger, D. ; Leonard, P.J. ; Karaguler, T.

Author_Institution

Bath Univ., UK

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2359

Lastpage

2363

Abstract

A finite-element technique for modeling 3D transient eddy currents in smooth-rotor conductors moving at a constant velocity is described. The method does not require the electric scalar potential inside conducting regions in moving-conductor problems. The interface between moving and stationary conductors requires a jump in magnetic vector potential when the electric scalar is not present. This is handled using a thin-surface element. The method has been implemented in the MEGA software package for modeling 2D and 3D electromagnetic fields. Eddy-current regions are modeled using a magnetic vector potential. Nonconducting regions require magnetic scalar potentials. Validation by comparison with experiment has been carried out. The study of eddy currents in an electromagnetic launcher is considered

Keywords

conductors (electric); eddy currents; electrical engineering computing; electromagnetic fields; electromagnetic launchers; finite element analysis; physics computing; transients; 3D moving conductor eddy current problems; MEGA software package; constant velocity; electromagnetic fields; electromagnetic launcher; finite-element technique; magnetic scalar potentials; magnetic vector potential; modeling; optimal formulation; smooth rotors; thin-surface element; transient eddy currents; Conductors; Couplings; Eddy currents; Equations; Finite element methods; Induction machines; Laboratories; Magnetic levitation; Software packages; Vehicles;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104731

Filename

104731