Imperial College London
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DrStevenWright

Faculty of Engineering, Department of Electrical and Electronic Engineering

Senior Teaching Fellow
 
 
 
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Contact

 

+44 (0)20 7594 6206s.wright02

 
 
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Location

 

1008BElectrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wright:2019:10.1109/LSENS.2019.2918339,
author = {Wright, S and Kiziroglou, M and Spasic, S and Nebojsa, R and Yeatman, E},
doi = {10.1109/LSENS.2019.2918339},
journal = {IEEE Sensors Letters},
title = {Inductive energy harvesting from current-carrying structures},
url = {http://dx.doi.org/10.1109/LSENS.2019.2918339},
volume = {3},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This article introduces an inductive method for harvesting energy from current-carrying structures. Numerical simulation of a structural beam shows that the skin effect can lead to significant current concentration at edges, providing a five-fold power benefit at such locations, even at frequencies below 1 kHz. The use of a rectangular ferrite core can provide a ×4 power density improvement. The adoption of funnel-like core shapes allows the reduction of core mass and coil frame size, leading to significant further power density enhancement. Magnetic field simulation and coil analysis demonstrate a power density increase of ×49 by ferrite funnels, in comparison to a coreless coil. Experimental results demonstrate rectified power over 1 mW delivered to a storage capacitor, from a 40 × 20 × 2 mm core-and-coil, in the vicinity of a spatially distributed 20 A current at 800 Hz. Rectification and impedance matching are studied experimentally using a voltage doubler circuit with input capacitor tuning to counteract the coil reactance. Experimental results from a spatially distributed 30 A current at 300 Hz and a 1:7 funnel core demonstrate power density of 36  μ W/g (103  μ W/cm 3 ), opening up the way to noninvasive inductive powering of systems in the vicinity of current-carrying structures.
AU  - Wright,S
AU  - Kiziroglou,M
AU  - Spasic,S
AU  - Nebojsa,R
AU  - Yeatman,E
DO  - 10.1109/LSENS.2019.2918339
PY  - 2019///
SN  - 2475-1472
TI  - Inductive energy harvesting from current-carrying structures
T2  - IEEE Sensors Letters
UR  - http://dx.doi.org/10.1109/LSENS.2019.2918339
UR  - http://hdl.handle.net/10044/1/70630
VL  - 3
ER  -
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