Open AccessDefining the mutual coupling of capacitive power transfer for wireless power transfer
Author(s) -
Huang L.,
Hu A.P.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.2709
Subject(s) - capacitive coupling , coupling coefficient of resonators , capacitive sensing , wireless power transfer , coupling (piping) , power (physics) , direct coupling , maximum power transfer theorem , electrical engineering , electronic engineering , capacitance , physics , topology (electrical circuits) , engineering , voltage , mechanical engineering , quantum mechanics , electrode , resonator
Capacitive power transfer (CPT) based on electric field coupling has been proposed recently as an alternative technology for wireless power transfer, and a good understanding of the capacitive coupling is of great importance in the design and evaluation of CPT systems. A new term named capacitive coupling coefficient k E is introduced to provide a quantitative measure of the coupling condition between the coupling plates. The term is derived by modelling the capacitive coupling plates based on electric charge balance, and its physical meaning is explained clearly in relation to the equivalent primary/secondary and mutual capacitances, which is also experimentally demonstrated by comparing two CPT systems with different cross‐coupling configurations.