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Effectiveness of Magnetic Composite Material on Copper Loss Reductions and Misalignment in Copper‐Plate‐Coils for Wireless Power Transmission
Author(s) -
Sato Mitsuhide,
Endo Shun,
Bu Yinggang,
Mizuno Tsutomu
Publication year - 2021
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.23318
Subject(s) - copper loss , electromagnetic coil , copper , wireless , power transmission , electrical engineering , composite number , transmission (telecommunications) , electric power transmission , materials science , automotive engineering , engineering , power (physics) , composite material , telecommunications , metallurgy , physics , quantum mechanics
Wireless power transmission systems are suitable for use in charging systems for plug‐in hybrid vehicles and electric vehicles, particularly when considering safety and convenience. Wireless power transmission coils are made of litz copper wire to reduce copper losses at high frequencies. However, litz wires are expensive owing to their complicated structure and large number of manufacturing steps. Herein, a copper‐plate‐coil is proposed that can be manufactured at a low cost is proposed. A magnetic flux path control technique is also proposed to reduce copper losses. The use of a magnetic composite material for realizing magnetic flux path control technology reduces the alternative current resistance by 50%. In addition, this study reports the effects of the magnetic composite material on coupling coefficients observed during coil misalignment. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.