Title :
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
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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2440420
