3-D Semianalytical Surface Charge Model Including Relative Permeability Using Polynomial Approximation

Author

van Casteren, Dave T. E. H. ; Paulides, J.J.H. ; Lomonova, E.A.

Author_Institution

Dept. of Electr. Eng., Eindhoven Univ. of Technol., Eindhoven, Netherlands

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

To model a magnet, the surface charge model can be used. This results in fast and accurate analytical solutions when the relative permeability is equal to one. If this is not the case, the model has to be calculated numerically and the computational time increases significantly. In this paper, a polynomial approximation of the surface charge is therefore proposed to obtain a semianalytical model. The results are less accurate than the numerical model. It is, however, about 300 times faster. This 3-D model is used to model, a magnet, a soft-magnetic block in an external field, and a gravity compensator, which is a combination of magnets and a soft-magnetic plate.

Keywords

magnetic permeability; polynomial approximation; surface charging; 3-d semianalytical surface charge model; gravity compensator; numerical model; polynomial approximation; relative permeability; soft-magnetic block; soft-magnetic plate; Approximation methods; Computational modeling; Gravity; Magnetic levitation; Numerical models; Permeability; Polynomials; Electromagnetic; relative permeability modeling; surface charge;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2331984

Filename

6971694