Coil impedance due to a sphere of arbitrary radial conductivity and permeability profiles

Author

Theodoulidis, Theodoros P. ; Kriezis, Epameinondas E.

Author_Institution

Dept. of Eng., Aristotle Univ. of Thessaloniki, Kozani, Greece

Volume

38

Issue

3

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

1452

Lastpage

1460

Abstract

This paper presents analytical expressions for coil impedance due to a spherical workpiece consisting of concentric spherical shells. The expressions are used to simulate the nondestructive inspection of a sphere having arbitrary radial conductivity and magnetic permeability profiles by a circular coil of rectangular cross section. The simulation replaces continuous profiles with piecewise constant profiles. The paper compares the results to published experimental measurements and the results of other analytical solutions

Keywords

Helmholtz equations; coils; conducting bodies; current distribution; eddy current testing; eddy currents; electric impedance; magnetic permeability; arbitrary magnetic permeability profiles; arbitrary radial conductivity; coil impedance; concentric spherical shells; continuous profiles; current distribution; eddy current; electromagnetic field quantities; filamentary excitation; nondestructive inspection; piecewise constant profiles; spherical workpiece; vector Helmholtz equation; Coils; Conductivity; Eddy currents; Electric variables; Engine cylinders; Geometry; Impedance; Inspection; Magnetic analysis; Permeability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.999117

Filename

999117