Open AccessNFC transmitter coil placement to minimise degradation of A4WP wireless power transfer efficiency
Author(s) -
Kang M.,
Noh E.,
Kim K.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.0660
Subject(s) - wireless power transfer , electromagnetic coil , transmitter , coil tap , coil noise , electrical engineering , acoustics , power (physics) , materials science , rogowski coil , nuclear magnetic resonance , physics , engineering , channel (broadcasting) , quantum mechanics
The wireless power transfer (WPT) transmitter (Tx) coil and near field communication (NFC) Tx coil are combined in one transmitter. The coil system consists of an NFC Tx coil and a WPT coil system that includes an A4WP Tx coil and an A4WP receiver (Rx) coil. The WPT coil system uses a magnetic resonance method. A4WP coils are tuned to resonate at 6.78 MHz. The NFC Tx coil is tuned to resonate at 13.56 MHz and positioned between the A4WP Tx and Rx coils. Moving the position of NFC Tx coil near the A4WP Tx coil, interference phenomena among coils are investigated and changes of WPT efficiencies are measured. Optimal placements of the NFC Tx coil that minimise the loss of WPT efficiency are determined based on the analysis data.