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Comparative Study of Coupling Factors for Assessment of Low-Frequency Magnetic Field Exposure
Journal of Magnetics, Volume 21, Number 4, 31 Dec 2016, Pages 516-523
Jae-Hoon Shim (Department of Electrical Engineering, Soongsil University), Min-Soo Choi (Department of Electrical Engineering, Soongsil University), Kyu-Jin Jung (Department of Electrical Engineering, Soongsil University), Jong-Hwa Kwon (Radio Technology Research Department, Electronics and Telecommunications Research Institute), Jin-Kyu Byun * (Department of Electrical Engineering, Soongsil University)
Abstract

In this paper, coupling factors are calculated based on numerical analysis in order to assess various nonuniform low-frequency magnetic field exposure situations. Two types of non-uniform magnetic field sources are considered; circular coil and parallel wires with balanced currents. For each magnetic field source, source current values are determined so that reference magnetic field magnitude can be measured at the specified point on the human model. Various exposure situations are investigated by changing parameters such as the distance between source and human model, radius of circular coil, and the gap between parallel wires. For equivalent human models, prolate spheroid model and simplified human model from IEC 62311 standard are used. The calculated coupling factor values are compared with those obtained by 2D uniform disk human model, and the dependence of coupling factor on the choice of equivalent human model is analyzed.


 

Keywords: coupling factor; human model; magnetic field exposure; non-uniform field
DOI: https://doi.org/10.4283/JMAG.2016.21.4.516
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