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.

中文翻译：

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磁性复合材料对减少铜损和铜箔线圈功率传输的有效性

无线功率传输系统适用于插电式混合动力汽车和电动汽车的充电系统，尤其是考虑到安全性和便利性时。无线电力传输线圈由绞合铜线制成，以减少高频时的铜损。然而，绞合线由于其复杂的结构和大量的制造步骤而昂贵。在此，提出一种可以低成本制造的铜板卷。还提出了磁通路径控制技术以减少铜损。使用磁性复合材料来实现磁通路径控制技术可将交流电阻降低50％。此外，这项研究报告了磁性复合材料对线圈未对准期间观察到的耦合系数的影响。©2021日本电气工程师学会。由Wiley Periodicals LLC发布。