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Enhancement of wireless power transfer efficiency using flat conductor with ferrite wall
Author(s) -
Park ByungChul,
Lee JeongHae
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29350
Subject(s) - conductor , ferrite (magnet) , materials science , wireless power transfer , microwave , resonator , electrical engineering , ohmic contact , optoelectronics , electrical conductor , composite material , telecommunications , engineering , electromagnetic coil , layer (electronics)
In this letter, a flat conductor with ferrite wall of spiral resonator is presented to reduce ohmic loss and improve wireless power transmission (WPT) efficiency. The ferrite walls are configured along both side edges of the flat conductor and make more uniformed current distribution on the conductor, so that the conductor resistance is reduced and the efficiency is improved. In the measurement, it is confirmed that the resistance of the spiral resonator with the ferrite wall is reduced by 25% (0.020–0.015 Ω) and the WPT efficiency is improved by 10% (25–35%) at 70‐cm distance when the size of the resonator and the resonance frequency are 35 × 35 × 6 cm 3 and 128 kHz, respectively. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2371–2373, 2015