Analytical modelling and calculation of pulsed magnetic field and input impedance for EMATs with planar spiral coils

被引:25
作者
Hao, Kuansheng [1 ]
Huang, Songling [1 ]
Zhao, Wei [1 ]
Wang, Shen [1 ]
Dong, Jiarui [1 ]
机构
[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
EMATs; Pulsed eddy current; Input impedance; Spiral coil;
D O I
10.1016/j.ndteint.2011.01.001
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The analytical expressions of magnetic flux density, pulsed eddy current and input impedance for EMATs with single-layer and double-layer planar spiral coils in frequency-domain were derived in terms of separation of variables and superposition theorem. The Truncated Domain Eigen-function Expansion method (TREE) was used to solving the infinite integral problem by series summation. The time-domain magnetic flux density, pulsed eddy current and Lorentz force were calculated through FFT-IFFT method. The calculated results of the proposed method were compared with those of time step FEM method and measurement. Their good agreement verifies the accuracy and validity of the proposed model and method. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:274 / 280
页数:7
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