日本AEM学会誌
Online ISSN : 2187-9257
Print ISSN : 0919-4452
ISSN-L : 0919-4452
25 巻 , 4 号
選択された号の論文の8件中1~8を表示しています
特集 自動車工学
一般論文[学術論文]
  • 柴 建次
    2017 年 25 巻 4 号 p. 395-402
    発行日: 2017年
    公開日: 2018/01/30
    ジャーナル フリー

     Externally coupled transcutaneous energy transmission systems (ECTETS) can supply energy to implantable ventricular assist devices wirelessly. However, the magnetic field strength induced by this system at a frequency of 2 to 4 MHz exceeds the acceptable limit guideline provided by the International Special Committee on Radio Interference (CISPR 11). To reduce the emitted magnetic field strength, the leakage inductance of the secondary coil is cancelled by a resonance capacitor, which is inserted between a secondary coil and a rectifier circuit. An equivalent circuit of ECTETS is used to determine the capacitive value. DC-DC energy transmission efficiency and the emitted magnetic field strength of the prototype ECTETS were measured without and with resonance capacitance. The results indicated that the transmission efficiency could be increased from 79.3% to 84.0% and the emitted magnetic field strength could be reduced from 16 dBµA/m to 5.6 dBµA/m at 2.74 MHz by introducing a resonance capacitor.

  • 秋山 美郷, 佐野 宏靖, 大森 学
    2017 年 25 巻 4 号 p. 403-408
    発行日: 2017年
    公開日: 2018/01/30
    ジャーナル フリー

     Wireless power transfer that supply electric energy without wires is attracting the attention now. Many of the technologies use magnetic or electric field, but it have common problems that transmission efficiency depend on transmission distance. Therefore, we propose “sandwiched structure antenna” which having two pair of transmission antennas and reception antennas. Using the new structure, transmission efficiency can be made substantially constant inside a confined space.

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