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Optimal design of a wireless power transfer link using parallel and series resonators

Published online by Cambridge University Press:  30 August 2016

Giuseppina Monti*
Affiliation:
Department of Engineering for Innovation, University of Salento, Lecce, Italy. Phone: +39 0832 29 7365
Alessandra Costanzo
Affiliation:
Department of Electrical, Electronic and Information Engineering, University of Bologna, Bologna, Italy
Franco Mastri
Affiliation:
Department of Electrical, Electronic and Information Engineering, University of Bologna, Bologna, Italy
Mauro Mongiardo
Affiliation:
Department of Engineering, University of Perugia, Perugia, Italy
*
Corresponding author: G. Monti Email: giuseppina.monti@unisalento.it

Abstract

The optimal design problem for a wireless power transfer link based on a resonant inductive coupling is addressed in this paper. It is assumed that the magnetic coupling coefficient and the inductor quality factors are known. By employing the conjugate image impedances, the values of the inductances realizing the optimal design with respect to given values of the network input and load impedances are derived. It is demonstrated that there is just one optimal design maximizing both the power delivered to the load and the power transfer efficiency of the link. The four possible schemes corresponding to the use of a parallel or a series arrangement for the two coupled resonators (Parallel-Parallel, Series-Series, Parallel-Series, and Series-Parallel) are considered and discussed. Closed form analytical formulas are derived and validated by circuital simulations.

Type
MMS Special Issue
Copyright
Copyright © Cambridge University Press 2016 

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