Wireless power transfer through metal using inductive link

Tuan Anh Vu, Chi Van Pham, Anh-Vu Pham, Christopher S. Gardner


This paper presents a highly efficient power transfer system based on a co-design of a class-E power amplifier (PA) and a pair of inductively coupled Helical coils for through-metal-wall power transfer. Power is transferred wirelessly through a 3.1-mm thick aluminum barrier without any physical penetration and contact. Measurement results show that the class-E PA achieves a peak power gain of 25.2 dB and a maximum collector efficiency of 57.3%, all at 200 Hz. The proposed system obtains a maximum power transfer efficiency of 9% and it can deliver 5 W power to the receiver side through the aluminum barrier.

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DOI: http://doi.org/10.11591/ijpeds.v10.i4.pp1906-1913
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