CALCULATION MODEL FOR THE INDUCED VOLTAGE IN RECTANGULAR COILS ABOVE CONDUCTIVE PLATES

Facta Universitatis, Series: Electronics and Energetics

Siquan Zhang¹  Nathan Ida² 

[1] Department of Electrical and Automation, Shanghai Maritime University, Shanghai, 201306, China$$;Department of Electrical and Computer Engineering, The University of Akron, Akron, OH, 44325-3904, USA$$

关键词: Eddy current testing;    Conductive plates;    Rectangular coil;    Induced voltage;    Finite element method;   

DOI  :  10.2298/FUEE1701027Z

来源: University of Nis

【 摘 要 】

Electromagnetic NDT methods and in particular eddy currents play an important role in nondestructive testing of conducting materials. In testing conductive structures, rectangular coils are often more useful than circular coils. A particular configuration consists of two rectangular coils located above the conductive plates, one placed parallel to the plates serving as an excitation coil and the other perpendicular to the plates serving as a sensing coil. In this work we derive analytical expressions for the induced voltage variations in the pick-up coil. Then the influences of the plate thickness, the exciting frequency and the moving speed of the conductor on the induced voltage variation are analyzed. The analytical calculation results are verified using the finite element method.

【 授权许可】

Unknown