An eddy current model of pot-cored coil for testing multilayer conductors with a hole

• Autorzy: Tytko G.

Identyfikatory

DOI

10.24425/bpasts.2020.135388

• Języki publikacji: EN

Abstrakty

EN

Pot-cored coils are commonly used as probes in eddy current testing. In this paper, an analytical model of such a coil placed over a three-layer plate with a hole has been presented. The proposed solution enables the modelling of both magnetic and non-magnetic conductive plates that contain different types of hole, i.e. a through, a surface, an inner or a subsurface hole. The problem was solved by using the truncated region eigenfunction expansion (TREE) method. The analysis was carried out in a cylindrical coordinate system in which the solution domain was radially limited. With the employment of the filamentary coil, the expressions for the magnetic vector potential, and subsequently for the impedance of the cylindrical coil were obtained. The final formulas were presented in a closed form and then implemented in Matlab. The resistance and reactance values were compared with the results obtained in the experiment and using the finite element method in the Comsol Multiphysics package. In each of the cases, good agreement was obtained.

Słowa kluczowe

EN

non-destructive testing; eddy currents; coil impedance; ferrite core; truncated region eigenfunction expansion

PL

badania nieniszczące; prądy wirowe; impedancja cewki; rdzeń ferrytowy; skrócony obszar ekspansji funkcji własnych

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2020
• Tom: Vol. 68, nr 6
• Strony: 1311--1317
• Opis fizyczny: Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Tytko G.

• Institute of Electronics, The Silesian University of Technology, ul. Akademicka 16, 44-100 Gliwice, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).