Problem-oriented adaptive mesh-generation for accurate finite-element calculation

Author

Tärnhuvud, T. ; Reichert, K. ; Skoczylas, J.

Author_Institution

Dept. of Electr. Machines, Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

779

Lastpage

782

Abstract

Various sources of error in the finite-element method are examined. It is shown that the approximation of the vector potential, the discretization of the mesh, and the boundary discontinuity of H _t can have a great influence on the accuracy of different quantities. Local and integral quantities on the derivative of the potential, such as forces and torques, are especially affected. To reduce these errors higher-order elements or adaptive mesh refinement processes can be used. A method is developed which uses a local adaptive refinement technique in the important region

Keywords

DC machines; electromagnetic field theory; error analysis; finite element analysis; machine theory; magnetic fields; numerical methods; adaptive mesh refinement processes; boundary discontinuity; error; finite-element method; forces; integral quantities; local quantities; magnetic fields; mesh discretisation; permanent magnet DC machine; problem oriented adaptive mesh generation; torques; vector potential approximation; Computer errors; Electromagnetic fields; Finite element methods; Integral equations; Magnetic flux; Maxwell equations; Saturation magnetization; Shape; Torque; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106433

Filename

106433