Open AccessInhomogeneous electromagnetic metamaterial design method for improving efficiency and range of wireless power transfer
Author(s) -
An Huilin,
Liu Guoqiang,
Li Yanhong,
Song Jiaxiang,
Zhang Chao,
Liu Min
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0255
Subject(s) - wireless power transfer , metamaterial , permeability (electromagnetism) , electromagnetic coil , power transmission , relative permeability , magnetic field , materials science , electromagnetic field , electronic engineering , leakage (economics) , electrical engineering , acoustics , physics , engineering , power (physics) , optoelectronics , chemistry , quantum mechanics , biochemistry , macroeconomics , membrane , porosity , economics , composite material
In the past few years, the limitation of homogeneous electromagnetic metamaterial (EMMM) in magnetic field modulation had been proved by many researches. The introduction of inhomogeneous EMMM (IEMMM) provided a significant progress in improving the range and efficiency of the wireless power transfer system (WPTS). An IEMMM with three kinds of effective permeability came up here. By analysing the effective permeability characteristics of the circular, square, and ‘8’‐shaped coil unit cell and the modulated regulation of magnetic field by negative permeability medium, a two‐dimensional IEMMM with combinations of square and ‘8’‐shaped coil unit cell were studied. The finite element simulation results of WPTS with IEMMM proved an improvement in magnetic field modulation and flux leakage control. In the WPTS, the designed IEMMM is able to improve the power transmission efficiency by up to 28%.