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International Journal for Engineering Modelling, Vol. 33 No. 1-2 Regular Issue, 2020.

Original scientific paper

https://doi.org/10.31534/engmod.2020.1-2.ri.02f

Simulation of Human Body Exposure to Near Field of High and Low RF Wireless Power Transfer Systems

Petra Rašić orcid id orcid.org/0000-0002-7003-114X ; Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia
Maja Škiljo ; Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia
Zoran Blažević orcid id orcid.org/0000-0001-5405-8003 ; Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia
Vicko Dorić orcid id orcid.org/0000-0003-2222-8957 ; Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia
Dragan Poljak orcid id orcid.org/0000-0003-1205-4842 ; Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia

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Abstract

In this paper, human body exposure to high frequency electromagnetic field radiated by wireless power transfer system antennas is analysed by numerical modelling using commercial software FEKO. The analysis is carried out for two simplified models of human body (parallelepiped and cylinder model) exposed to high and low frequency radiation in terms of power transfer efficiency and specific absorption rate at frequencies of 13.56 MHz, 6.78 MHz, and 100 kHz. Used simplified models are validated by comparison with realistic human body model results. It is shown in our 5-W power transfer system example that the specific absorption rate in simplified, as well as in realistic, human body model does not exceed the reference limit values prescribed by international guidelines, both for the general and for the professional population. It is also shown that there is no significant difference in specific absorption rate and power transfer efficiency while using different human body models, which is excellent because the theoretical calculations limited on simplified models can be used for human body exposure estimation.

Keywords

spiral coil; square coil; simplified model of human body; power transfer efficiency; specific absorption rate; wireless power transfer

Hrčak ID:

241100

URI

https://hrcak.srce.hr/241100

Publication date:

16.7.2020.

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