Three-dimensional magnetic field analysis method using scalar potential formulated by boundary element method

Author

Koizumi, M. ; Onisawa, M. ; Utamura, M.

Author_Institution

Hitachi Ltd., Ibaraki, Japan

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

360

Lastpage

363

Abstract

A computational method for magnetic fields formulated by a BEM (boundary element method) has been developed. In the method, a reduced scalar potential is selected as an unknown variable to simplify the calculation of the boundary conditions. Its use requires a high numerical accuracy of the potential gradient. Conventional BEM does not provide this, because numerical element integration for the singular kernal causes a large error. To overcome this difficulty, a highly accurate numerical integration scheme is proposed based on the BEM, and it is applied to magnetic field problems. Calculation results for a spherical permeable material in a problem proposed by the Institute of Electrical Engineers of Japan (the problem of a magnetic field generated by a coil) agreed with the exact solution and the experimental data within 5%

Keywords

boundary-elements methods; coils; magnetic fields; magnetostatics; numerical methods; BEM; boundary element method; coil; computational method; numerical accuracy; numerical element integration; numerical integration scheme; potential gradient; reduced scalar potential; singular kernal; spherical permeable material; three dimensional magnetic field analysis; Boundary conditions; Boundary element methods; Equations; Magnetic analysis; Magnetic fields; Magnetic flux density; Magnetic materials; Magnetic separation; Paramagnetic materials; Permeability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106328

Filename

106328