READ ME File For 'Dataset for the paper: Dual-Receiver Wearable 6.78 MHz Resonant Inductive Wireless Power Transfer Glove using Embroidered Textile Coils'

Dataset DOI: 10.5258/SOTON/1217

Dataset for the paper "Dual-Receiver Wearable 6.78 MHz Resonant Inductive Wireless Power Transfer Glove using Embroidered Textile Coils"
Journal: IEEE Access
Authors: Mahmoud Wagih; Abiodun Komolafe; Bahareh Zaghari

Abstract:
The design of dynamic wearable wireless power transfer systems (WPT) possesses multiple challenges that affect the WPT efficiency. The varying operation conditions, such as the coils coupling, and operation  in  proximity  or  through  the  human  body,  can  affect  the  impedance  matching  at  the  resonant frequency.  This  paper  presents  a  high-efficiency  wearable  6.78  MHz  WPT  system  for  smart  cycling applications.  Resonant  inductive  coupling  using  dual-receiver  textile  coils  is  proposed  for  separation-independent  WPT,  demonstrated  in  a  smart  cycling  glove,  for  transferring  energy  from  an  on-bicycle generator  to  smart-textile  sensors.  The  effects  of  over-coupling  in  a  dynamic  WPT  system  have  been investigated  analytically  and  experimentally.  The  embroidered  coils  efficiency  is  studied  in  space,  on-and through-body. The measured results, in space, shows around 90% agreement between the analytical and experimental results. An asymmetric dual-receiver architecture is proposed. Empirical tuning of the lumped capacitors is utilized to achieve resonance at 6.78 MHz between the fundamental frequency and the even mode split frequency; in the over-coupling region. Two different coil sizes are utilized to achieve separation-independent efficiency in the tight coupling region on- and off-body, while maintaining a Specific Absorption Rate (SAR) under 0.103 W/kg. The presented system achieves a peak efficiency of 90% and 82%in free space and on-hand respectively, with a minimum efficiency of 50% under loose and tight coupling,demonstrating more than 40% efficiency improvement over a 1:1 symmetric transmit and receive coil at the same separation.

Contents:
Wearable_WPT_Glove_IEEEAccess_Dataset.csv: measured and calculated efficiencies
Analytical_Eff_Freq_S_Fig2A.csv: 2D-variable calculated efficiency

Largecoil_onhand_CSTTD.cst: CST model used in simulation

MR_WPT_Hand_CST_simulated_sparams.s2p: Simulated s-parameters using the CST model

X_Y.s2p: Measured s-parameters of X: coil combination (L: large, S: small) and Y: test conditions (separation and human proximity)


Date of data collection: 1/3/19 - 1/1/20

Licence: CC BY

Related projects:
EP/P010164/1