Research Article
New Analytical Formulas for Coupling Coefficient of Two Inductively Coupled Ring Coils in Inductive Wireless Power Transfer System
@INPROCEEDINGS{10.1007/978-3-030-62483-5_13, author={Mohammed Al-Saadi and Stanimir Valtchev and Jos\^{e} Gon\`{e}alves and Aurelian Crăciunescu}, title={New Analytical Formulas for Coupling Coefficient of Two Inductively Coupled Ring Coils in Inductive Wireless Power Transfer System}, proceedings={Green Energy and Networking. 7th EAI International Conference, GreeNets 2020, Harbin, China, June 27-28, 2020, Proceedings}, proceedings_a={GREENETS}, year={2020}, month={11}, keywords={Wireless power transfer Inductive power transfer Battery charging Electric vehicles Ring coil Coupling coefficient Box-Behnken design Response surface methodology}, doi={10.1007/978-3-030-62483-5_13} }- Mohammed Al-Saadi
Stanimir Valtchev
José Gonçalves
Aurelian Crăciunescu
Year: 2020
New Analytical Formulas for Coupling Coefficient of Two Inductively Coupled Ring Coils in Inductive Wireless Power Transfer System
GREENETS
Springer
DOI: 10.1007/978-3-030-62483-5_13
Abstract
In this paper, an analytical formula for the coupling coefficient (k) was introduced for two inductively coupled coils of ring configuration. The response surface methodology (RSM) was used as a tool to develop this formula. The k was tested as a function of the geometrical parameters which include the followings parameters: an air-gap (d) between inductively coupled coils; coils dimensions which include the inner (r1) and outer (r2) radii of the transmitter coil, inner (R1) and outer (R2) radii of the receiver coil; and misalignment parameters. Therefore, the introduced k formula is facilitating of a ring coil design, performance optimization of an IPT system, and prediction of system behaviour at normal or misalignment cases. The percentage effect of each parameter on the k was calculated. It was found that the d has the most considerable impact on the k among other geometrical parameters.
