Title :
A 3D resonant wireless charger for a wearable device and a mobile phone
Author :
Ron-Chi Kuo ; Riehl, Patrick ; Satyamoorthy, Anand ; Plumb, William ; Tustin, Philip ; Jenshan Lin
Author_Institution :
MediaTek, Woburn, MA, USA
Abstract :
A resonant wireless power transfer (WPT) system that allows for free positioning of a wearable device about a 360° axis of rotation and simultaneous charging of a mobile phone is proposed. A 3D transmitter coil structure is introduced to provide a cylindrical charging surface with a uniform magnetic field. A prototype charging system including an amplifier and a rectifier operating at 6.78 MHz is demonstrated. The prototype delivers 1 W to a wearable device and 5 W to a mobile phone simultaneously with a power transfer efficiency of 48%.
Keywords :
HF amplifiers; coils; inductive power transmission; magnetic fields; rectifiers; 3D resonant wireless charger; 3D transmitter coil structure; WPT; amplifier; magnetic field; mobile phone; power 1 W; power 5 W; rectifier; resonant wireless power transfer; wearable device; Couplings; Mobile handsets; Surface charging; Three-dimensional displays; Transmitters; Wireless communication; Wireless sensor networks; Wireless charging; wearable; wireless power;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2015 IEEE
Conference_Location :
Boulder, CO
DOI :
10.1109/WPT.2015.7140169
