A Hybrid Coupler for 6.78MHz Desktop Wireless Power Transfer Applications with Stable Open-loop Gain

Xu Chen, Shengbao Yu*, Shuchao Song, River T. H. Li, Xiaobo Yang, Zhe Zhang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

283 Downloads (Pure)

Abstract

The open-loop gain of capacitive power transfer (CPT) circuit, especially for applications like wireless charging of laptop or keyboard, is sensitive to the changes of coupling capacitance, which makes the regulating of output voltage and output power difficult. Hybrid coupler has been proved to be able to combine the advantages of both inductive power transfer (IPT) and capacitive power transfer. In this paper, a hybrid coupler is designed with the aim of keeping a stable open-loop gain when the coupling capacitance changes. The structure as well as the operation principles of the hybrid coupler is explained firstly. Then, the open-loop gains of CPT, IPT and hybrid wireless power transfer (HWPT) are derived and followed by a simplified design guideline of the whole HWPT system using the proposed hybrid coupler. Finally, the proposed coupler is verified with a 40W, 6.78MHz experimental prototype.
Original languageEnglish
JournalIET Power Electronics
Volume12
Issue number10
Pages (from-to)2642-2649
ISSN1755-4535
DOIs
Publication statusPublished - 2019

Fingerprint Dive into the research topics of 'A Hybrid Coupler for 6.78MHz Desktop Wireless Power Transfer Applications with Stable Open-loop Gain'. Together they form a unique fingerprint.

Cite this