Study of Coupling Factor for Wireless Power Link in Advanced Brain-Machine Interface

Abstract:

The inductive wireless power transfer efficiency is determined by the coupling factor and coil quality factors. This paper studies the coupling factor of an inductive power link (IPL) for wireless power transfer in advanced brain-machine interface applications. By comparison to the experimental results, the various design tools including Maxwell simulation and two analytical models are evaluated for prediction of the coupling factor. The coupling factors of IPLs with different design parameters are also analyzed. The results show that for specific wireless power transfer distances, the coupling factor of an IPL is mainly related to the size and fill ratio of the coils, while is almost independent of the coil track pitch, coil width/pitch ratio, and track thickness.

• Periodical: Advanced Materials Research (Volumes 846-847)
• Pages: 893-897
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.846-847.893
• Online since: November 2013
• Authors: Hua Xi Wen*, Xian Gu, Dong Fang, De Dong Ding, Qiang Yu, Rong Xiang Wu
• Keywords: Brain-Machine Interface (BMI), Coupling Factor, Implantable Biomedical Devices, Inductive Power Link, Wireless Power Transfer (WPT)

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