Modeling of extremely low frequency magnetic field sources using multipole techniques

Author

Olsen, Robert G. ; Lyon, Christopher E.

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA

Volume

11

Issue

3

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

1563

Lastpage

1570

Abstract

It is necessary to identify sources of magnetic fields in order to analyze shielding schemes. In general, it is difficult to specify actual sources. Here an alternative method to process magnetic field measurement data to create a simple model of a complex set of quasimagnetostatic sources is described. This method uses the maximum likelihood estimation technique to calculate the coefficients of spherical and finite length cylindrical multipole sources whose positions have been defined by the user. If a good fit to measured data is achieved, the simple model can then be used to provide input data required by a shielding analysis program

Keywords

magnetic field measurement; magnetic fields; magnetic shielding; magnetostatics; maximum likelihood estimation; extremely low frequency magnetic field sources; finite length cylindrical multipole sources; magnetic field measurement data; maximum likelihood estimation technique; modeling; multipole techniques; quasimagnetostatic sources; shielding analysis program; shielding schemes; spherical multipole sources; Circuits; Electromagnetic measurements; Frequency measurement; Magnetic field measurement; Magnetic fields; Maximum likelihood estimation; Phase measurement; Position measurement; Region 4; Volume measurement;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.517517

Filename

517517