Cargando…
A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons
A physical model of electromagnetic induction is developed which relates directly the forces between electrons in the transmitter and receiver windings of concentric coaxial finite coils in the near-field region. By applying the principle of superposition, the contributions from accelerating electro...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4971256/ https://www.ncbi.nlm.nih.gov/pubmed/27493580 http://dx.doi.org/10.1098/rspa.2016.0338 |
_version_ | 1782446076230369280 |
---|---|
author | Smith, Ray T. Jjunju, Fred P. M. Young, Iain S. Taylor, Stephen Maher, Simon |
author_facet | Smith, Ray T. Jjunju, Fred P. M. Young, Iain S. Taylor, Stephen Maher, Simon |
author_sort | Smith, Ray T. |
collection | PubMed |
description | A physical model of electromagnetic induction is developed which relates directly the forces between electrons in the transmitter and receiver windings of concentric coaxial finite coils in the near-field region. By applying the principle of superposition, the contributions from accelerating electrons in successive current loops are summed, allowing the peak-induced voltage in the receiver to be accurately predicted. Results show good agreement between theory and experiment for various receivers of different radii up to five times that of the transmitter. The limitations of the linear theory of electromagnetic induction are discussed in terms of the non-uniform current distribution caused by the skin effect. In particular, the explanation in terms of electromagnetic energy and Poynting’s theorem is contrasted with a more direct explanation based on variable filament induction across the conductor cross section. As the direct physical model developed herein deals only with forces between discrete current elements, it can be readily adapted to suit different coil geometries and is widely applicable in various fields of research such as near-field communications, antenna design, wireless power transfer, sensor applications and beyond. |
format | Online Article Text |
id | pubmed-4971256 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-49712562016-08-04 A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons Smith, Ray T. Jjunju, Fred P. M. Young, Iain S. Taylor, Stephen Maher, Simon Proc Math Phys Eng Sci Research Articles A physical model of electromagnetic induction is developed which relates directly the forces between electrons in the transmitter and receiver windings of concentric coaxial finite coils in the near-field region. By applying the principle of superposition, the contributions from accelerating electrons in successive current loops are summed, allowing the peak-induced voltage in the receiver to be accurately predicted. Results show good agreement between theory and experiment for various receivers of different radii up to five times that of the transmitter. The limitations of the linear theory of electromagnetic induction are discussed in terms of the non-uniform current distribution caused by the skin effect. In particular, the explanation in terms of electromagnetic energy and Poynting’s theorem is contrasted with a more direct explanation based on variable filament induction across the conductor cross section. As the direct physical model developed herein deals only with forces between discrete current elements, it can be readily adapted to suit different coil geometries and is widely applicable in various fields of research such as near-field communications, antenna design, wireless power transfer, sensor applications and beyond. The Royal Society Publishing 2016-07 /pmc/articles/PMC4971256/ /pubmed/27493580 http://dx.doi.org/10.1098/rspa.2016.0338 Text en © 2016 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Research Articles Smith, Ray T. Jjunju, Fred P. M. Young, Iain S. Taylor, Stephen Maher, Simon A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
title | A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
title_full | A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
title_fullStr | A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
title_full_unstemmed | A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
title_short | A physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
title_sort | physical model for low-frequency electromagnetic induction in the near field based on direct interaction between transmitter and receiver electrons |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4971256/ https://www.ncbi.nlm.nih.gov/pubmed/27493580 http://dx.doi.org/10.1098/rspa.2016.0338 |
work_keys_str_mv | AT smithrayt aphysicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT jjunjufredpm aphysicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT youngiains aphysicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT taylorstephen aphysicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT mahersimon aphysicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT smithrayt physicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT jjunjufredpm physicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT youngiains physicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT taylorstephen physicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons AT mahersimon physicalmodelforlowfrequencyelectromagneticinductioninthenearfieldbasedondirectinteractionbetweentransmitterandreceiverelectrons |