特集 生体モニタリング技術
裁縫技術とリッツ線を用いて作製されたコイルと非接触電力伝送への応用
2023 年 31 巻 4 号 p. 517-524
詳細
2023 年 31 巻 4 号 p. 517-524
Flexible and high-conductive coils are required to deliver power wirelessly to wearable devices. This paper describes coils fabricated with sewing high-conductive Litz wire and wireless power transmission using the coils. Those coils are fabricated by using some sewing techniques such as hand sewing, sewing machine and a punch needle method. A coil with 15 turns and a 150 mm × 150 mm square shape has 60 - 120 of the Q-factor at measurement frequencies from 100 kHz to 1000 kHz. A wireless power transfer system was built with the coil. A power oscillator was used in the system in order to adjust the operating frequency automatically. Maximum AC power efficiencies were around 0.44 - 0.99 at the coil distances from 0 to 150 mm in the prototype system. Durability against washing and effects on deformation were discussed.
