Image impedances of magnetic resonant wireless power transfer links

Author

Costanzo, Alessandra ; Dionigi, Marco ; Mastri, Franco ; Mongiardo, Mauro

Author_Institution

Dipt. dell´Energia Elettr. e dell´Inf., Univ. di Bologna, Bologna, Italy

fYear

2014

fDate

2-4 April 2014

Firstpage

1

Lastpage

3

Abstract

In magnetic resonant wireless power transfer the free-space part of the link is realized by using coupled inductances and by adding appropriate series capacitances (so as to obtain resonance). By introducing appropriate reactive matching networks, we remain with a two port lossy network. In this work it is shown that, by taking as reference impedance the image impedances of the two port lossy network, we realize a system with the maximum efficiency. Such a system, in addition, does not suffer from frequency shifts of resonances and similar phenomena. An experimental verification of the proposed approach is also presented.

Keywords

inductive power transmission; magnetic devices; two-port networks; coupled inductance; image impedance; magnetic resonant wireless power transfer link; reactive matching network; series capacitance; two port lossy network; Couplings; Frequency measurement; Impedance; Magnetic resonance imaging; Ports (Computers); Resonant frequency; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC), 2014 International Workshop on

Conference_Location

Leuven

Type

conf

DOI

10.1109/INMMIC.2014.6815100

Filename

6815100