Open AccessDesign and voltage regulation of inductively coupled wireless power transfer circuits with an intermediate coil
Author(s) -
Oh KwangKyo
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2019.0180
Subject(s) - electromagnetic coil , wireless power transfer , electrical engineering , coil noise , transmitter , electrical impedance , voltage , maximum power transfer theorem , electronic engineering , repeater (horology) , power (physics) , electronic circuit , coil tap , engineering , physics , rogowski coil , coupling (piping) , mechanical engineering , quantum mechanics , channel (broadcasting)
An inductively coupled wireless power transfer (WPT) circuit consisting of the transmitter, the receiver, and an additional intermediate coil is studied. It is assumed that the intermediate coil is located coplanar with the transmitter coil. Although it has been known that the intermediate coil serves as a power repeater, its effect on the three‐coil WPT circuit characteristics has not been thoroughly investigated. Accordingly, this study analyses how the intermediate coil affects the voltage transfer function and the input impedance of the WPT circuit. Based on the analysis result, design considerations are presented and output voltage regulation via operation frequency adjustment is discussed. A design example for the three‐coil WPT circuit is presented and the simulation and experimental results are provided.