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Numerical and experimental study of the effects of load and distance variation on wireless power transfer systems using magnetically coupled resonators

Numerical and experimental study of the effects of load and distance variation on wireless power transfer systems using magnetically coupled resonators
Numerical and experimental study of the effects of load and distance variation on wireless power transfer systems using magnetically coupled resonators
This work investigates ways of simulating a series resonant circuit designed to wirelessly transfer power to charge a battery of an electrical vehicle. A common approach assumes the load connected to the power transfer system to be constant and then the wireless link efficiency is studied. In practical engineering applications, however, the load and the distance between coils will vary influencing strongly the efficiency, which may also be affected by the presence of massive conducting or shielding structures in the proximity of the wireless system. Here we study these effects with the help of an equivalent circuit extracted from a full 3D field simulation and correlated with measured results. We reveal that by changing the load resistance the efficiency of the system can be improved, even for a large separation between the two magnetically coupled resonators; however, the maximum efficiency point may not correspond to the maximum power that can be handled by the system. We analyse the primary and secondary voltages and currents in support of the above findings.
magnetically coupled resonators, wireless power transfer, inductively coupled power transfer system.
Rotaru, M.
c53c5038-2fed-4ace-8fad-9f95d4c95b7e
Tanzania, R.
66c087c6-9c27-4ccb-b07c-8d6cdde0cae3
Ayoob, R.
9520a234-f49a-45b9-ba23-c4d0e500da14
Kheng, T.Y.
0e034d49-da51-4e46-93eb-caec82fe89e1
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Rotaru, M.
c53c5038-2fed-4ace-8fad-9f95d4c95b7e
Tanzania, R.
66c087c6-9c27-4ccb-b07c-8d6cdde0cae3
Ayoob, R.
9520a234-f49a-45b9-ba23-c4d0e500da14
Kheng, T.Y.
0e034d49-da51-4e46-93eb-caec82fe89e1
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb

Rotaru, M., Tanzania, R., Ayoob, R., Kheng, T.Y. and Sykulski, J.K. (2014) Numerical and experimental study of the effects of load and distance variation on wireless power transfer systems using magnetically coupled resonators. Ninth International Conference on Computation in Electromagnetics CEM 2014, United Kingdom. 31 Mar - 01 Apr 2014. 2 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This work investigates ways of simulating a series resonant circuit designed to wirelessly transfer power to charge a battery of an electrical vehicle. A common approach assumes the load connected to the power transfer system to be constant and then the wireless link efficiency is studied. In practical engineering applications, however, the load and the distance between coils will vary influencing strongly the efficiency, which may also be affected by the presence of massive conducting or shielding structures in the proximity of the wireless system. Here we study these effects with the help of an equivalent circuit extracted from a full 3D field simulation and correlated with measured results. We reveal that by changing the load resistance the efficiency of the system can be improved, even for a large separation between the two magnetically coupled resonators; however, the maximum efficiency point may not correspond to the maximum power that can be handled by the system. We analyse the primary and secondary voltages and currents in support of the above findings.

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Published date: 31 March 2014
Venue - Dates: Ninth International Conference on Computation in Electromagnetics CEM 2014, United Kingdom, 2014-03-31 - 2014-04-01
Keywords: magnetically coupled resonators, wireless power transfer, inductively coupled power transfer system.
Organisations: EEE

Identifiers

Local EPrints ID: 364289
URI: http://eprints.soton.ac.uk/id/eprint/364289
PURE UUID: 93674905-6be6-4b18-84e8-8ff07d38816d
ORCID for J.K. Sykulski: ORCID iD orcid.org/0000-0001-6392-126X

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Date deposited: 15 Apr 2014 09:57
Last modified: 20 Jul 2019 01:28

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