Study on Effective Loading Method of High-permeability Magnetic Sheet for Wireless Power Transmission Coil

Odanaka, Hiromu; Okano, Yoshinobu; Ogino, Satoshi

doi:10.1541/ieejeiss.138.1029

Cited by 1 publication

(1 citation statement)

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“…Magnetic flux path control technology uses a magnetic composite material with a relative magnetic permeability of approximately 10 to reduce the AC resistance. From the standpoint of controlling the magnetic flux, a technology has been proposed wherein a magnetic sheet with a relative permeability of 8000 is attached to the coil to suppress the influence of magnetic saturation and to improve the transmission efficiency [15]. Conversely, the magnetic composite material used herein has a relative magnetic permeability of approximately 10; therefore, it reduces the magnetic flux linkage to the coil and improves the AC resistance.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Magnetic Composite Material on Copper Loss Reductions and Misalignment in Copper‐Plate‐Coils for Wireless Power Transmission

Sato

Endo

et al. 2021

IEEJ Transactions Elec Engng

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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.

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Section: Introductionmentioning

confidence: 99%