Title :
A Novel Single-Layer Winding Array and Receiver Coil Structure for Contactless Battery Charging Systems With Free-Positioning and Localized Charging Features
Author :
Zhong, W.X. ; Liu, X. ; Hui, S.Y.R.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The planar contactless battery charging system is an emerging technology that can be applied to a wide range of portable consumer electronic products. Beginning with a brief historical background, this paper presents a new single-layer winding array and receiver coil structure with cylindrical ferrite cores for planar contactless battery charging systems. Complying with the “Qi” standard, this design enables multiple devices to be placed and charged simultaneously on the wireless charging pad in a free-positioning manner. The charging flux is totally localized within the covered area between the selected primary winding and the secondary winding inside the load. The electromagnetic characteristics of such winding design are studied in finite-element analysis and confirmed by practical implementation.
Keywords :
battery chargers; coils; ferrite devices; finite element analysis; inductive power transmission; magnetic cores; receivers; standards; windings; Qi standard; consumer electronic product; cylindrical ferrite core; electromagnetic characteristic; finite element analysis; free positioning feature; localized charging feature; planar contactless battery charging system; receiver coil structure; single layer winding array; winding design; Arrays; Consumer electronics; Finite element methods; Receivers; Windings; Wireless communication; Contactless battery charging; Qi wireless power standard; wireless power transfer;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2010.2098379
