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General series expression of eddy-current impedance for coil placed above multi-layer plate conductor 被引量:1

General series expression of eddy-current impedance for coil placed above multi-layer plate conductor
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摘要 This paper presents a closed expression of the layered-plate factor used to calculate the coil eddy-current impedance over the multi-layer plate conductor. By using this expression, the general series of eddy-current impedance can be written directly without solving the undetermined constant equations. The series expression is easy to use for theoretical analysis and programming. Experimental results show that calculated values and measured values are in agreement. As an application, when the bottom layer of the layered plate is a non-ferromagnetic thin layer conductor and the product of the thickness and conductivity of the layer remains unchanged, using the layered-plate factor expression proposed in this paper, it can be theoretically predicted that the eddy-current impedance curves corresponding to different thin layer thickness values will coincide. This paper presents a closed expression of the layered-plate factor used to calculate the coil eddy-current impedance over the multi-layer plate conductor. By using this expression, the general series of eddy-current impedance can be written directly without solving the undetermined constant equations. The series expression is easy to use for theoretical analysis and programming. Experimental results show that calculated values and measured values are in agreement. As an application, when the bottom layer of the layered plate is a non-ferromagnetic thin layer conductor and the product of the thickness and conductivity of the layer remains unchanged, using the layered-plate factor expression proposed in this paper, it can be theoretically predicted that the eddy-current impedance curves corresponding to different thin layer thickness values will coincide.
作者 Yin-Zhao Lei 雷银照(School of Automation Science and Electrical Engineering, Beihang University)
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第6期179-184,共6页 中国物理B(英文版)
基金 supported by the National Natural Science Foundation of China(Grant No.51577004)
关键词 multi-layer plate conductor layered-plate factor series expression eddy-current impedance multi-layer plate conductor layered-plate factor series expression eddy-current impedance
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