Open AccessInductor array for minimising transfer efficiency decrease of wireless power transmission components at misalignment
Author(s) -
Ahn H.R.,
Kim M.S.,
Kim Y.J.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.4087
Subject(s) - electromagnetic coil , wireless power transfer , transmission (telecommunications) , inductor , electrical engineering , power transmission , power (physics) , wireless , maximum power transfer theorem , electronic engineering , engineering , telecommunications , physics , voltage , quantum mechanics
A secondary coil design is reported for the stable transmission of wireless power in a misalignment situation. A coil array is applied to a secondary coil instead of typical single coil. When a misalignment occurs, the misalignment distance between an individual coil in the array and the primary coil is decreased relatively. Therefore, the sudden reduction in the inductive wireless power transmission (WPT) efficiency is mitigated. When the fabricated coil array transmits power, the maximum WPT efficiency improves by 56.45% compared with the typical single coil. The frequency band of the proposed array is wider, and this system can stably transmit power.