Title :
Comparisons of magnetic field shaping methods for ubiquitous wireless power transfer
Author :
Sohn, Yeong H. ; Choi, Bo H. ; Lee, Eun S. ; Rim, Chun T.
Author_Institution :
Dept. of Electr. Eng., KAIST, Daejeon, South Korea
Abstract :
New practical magnetic field shaping (MFS) method for ubiquitous wireless power transfer (U-WPT) systems is proposed in this paper. Comparative analyses on MFS methods for a ferromagnetic plate, a conductive plate, and LC-resonant coils, were conducted with a loop type transmitting coil. The overall superiority of a combination of the conductive plate and the LC-resonant coil for a long-distance-wide-range U-WPT over other MFS methods is confirmed by comparing not only the MFS performance but also installation issues and experimentally verified at the frequency of 230 kHz with the loop coil having a radius of 220 mm.
Keywords :
ferromagnetic materials; inductive power transmission; magnetic fields; magnetic shielding; LC-resonant coils; MFS method; U-WPT system; conductive plate; ferromagnetic plate; frequency 230 kHz; loop type transmitting coil; magnetic field shaping method; radius 220 mm; ubiquitous wireless power transfer; Coils; Copper; Ferrites; Magnetic fields; Magnetic flux density; Magnetic shielding; magnetic field shaping; magnetic shielding; ubiquitous wireless power trnasfer;
Conference_Titel :
Emerging Technologies: Wireless Power (WoW), 2015 IEEE PELS Workshop on
Conference_Location :
Daejeon
DOI :
10.1109/WoW.2015.7132810
