E-Cored Coil With a Circular Air Gap Inside the Core Column Used in Eddy Current Testing

Author

Tytko, Grzegorz ; Dziczkowski, Leszek

Author_Institution

Inst. of Electron., Silesian Univ. of Technol., Gliwice, Poland

Volume

51

Issue

9

fYear

2015

Firstpage

1

Lastpage

4

Abstract

The problem of an axially symmetric E-cored coil with a circular air gap inside the core column located above a two-layered conductive half-space is presented. The truncated region eigenfunction expansion method is used to derive expressions describing the magnetic vector potential of the filamentary coil. The final expressions for the impedance of the rectangular cross-sectional coil are obtained, and calculations for various frequency values are carried out. The results are compared with those from the COMSOL package, which shows a very good agreement.

Keywords

air gaps; coils; eddy current testing; eigenvalues and eigenfunctions; magnetic cores; COMSOL package; axially symmetric E-cored coil; circular air gap; core column; eddy current testing; filamentary coil; magnetic vector potential; rectangular cross-sectional coil; truncated region eigenfunction expansion method; two-layered conductive half-space; Eddy currents; Eigenvalues and eigenfunctions; Impedance; Magnetic cores; Magnetic domains; Mathematical model; Probes; Coil impedance; eddy current; magnetic cores; nondestructive testing; truncated region eigenfunction expansion; truncated region eigenfunction expansion (TREE);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2440420

Filename

7116581