2D nonlinear finite element modelling of electromagnetic retarders using time-stepping algorithms, and the Petrov-Galerkin method with homogenization techniques

Author

Labbe, N. ; Maréchal, Y. ; Meunier, G. ; Harara, H.B.

Author_Institution

Lab. d´´Electrotech. de Grenoble, CNRS, St. Martin d´´Heres, France

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

772

Lastpage

775

Abstract

This paper describes a method for finite element modelling of transient 2D eddy currents in the nonlinear moving conductor of an electromagnetic retarder. The magnetic vector potential A formulation is used, with a general single-step time-marching algorithm, and the fixed and moving coordinate systems are compared. A homogenization technique, inspired by the lamination modelling, is used to make the geometry of a moving region invariant along the speed direction, in order to use a more direct method to compute the steady state eddy currents in the whole rotor. Results are compared to measurements

Keywords

Galerkin method; eddy current braking; eddy currents; electromagnetic devices; finite element analysis; laminations; magnetic devices; rotors; 2D nonlinear finite element modelling; Petrov-Galerkin method; braking devices; electromagnetic retarders; fixed coordinate systems; homogenization technique; homogenization techniques; lamination modelling; magnetic vector potential A formulation; moving coordinate systems; nonlinear moving conductor; rotor; single-step time-marching algorithm; time-stepping algorithms; transient 2D eddy currents; Coils; Computational geometry; Conductors; Cooling; Eddy currents; Electromagnetic modeling; Electromagnetic transients; Finite element methods; Lamination; Magnetic flux; Maxwell equations; Moment methods; Solid modeling; Steady-state;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497354

Filename

497354