Title :
A thin, flexible receiving coil for wireless power transmission based on magnetic induction to an implantable device: Measuring the power efficiency of receiving coils with varying numbers of mounted magnetic sheets
Author :
Iwashita, Ryutaro ; Ishiwata, Masami ; Takaguchi, Yoji ; Koike, Takashi ; Hashimoto, Issei ; Shiba, Kenji
Author_Institution :
Dept. of Appl. Electron., Tokyo Univ. of Sci., Tokyo, Japan
Abstract :
Implanted medical devices require wireless power transmission. The wireless system proposed here uses a transmitting coil that could be worn around the waist to send power to a thin, flexible receiving coil located deep in a liquid NaCl solution of 0.25% mass concentration, simulating conditions in the human body. To determine optimal transmission efficiency, we examined receiving coils mounted with varying numbers of magnetic sheets. A maximum transmission efficiency of 19.2% was obtained at 1.8 MHz with no magnetic sheet. The maximum transmission efficiencies of receiving coils mounted with one sheet and two sheets were 12.5% at 1.3 MHz and 4.68% at 0.8 MHz, respectively. Our investigation confirmed that our wireless power transmission system is able to supply power to the microcontroller in the liquid solution.
Keywords :
coils; inductive power transmission; microcontrollers; flexible receiving coil; frequency 1.8 mHz; implantable device; implanted medical devices; liquid NaCl solution; magnetic induction; mass concentration; microcontroller; mounted magnetic sheets; optimal transmission; wireless power transmission; Magnetic circuits; Magnetic liquids; Microcontrollers; Power measurement; Power transmission; Wireless communication; Wireless sensor networks; Power transmission; implantable medical device; magnetic induction; magnetic sheet; wireless;
Conference_Titel :
Medical Information and Communication Technology (ISMICT), 2015 9th International Symposium on
Conference_Location :
Kamakura
DOI :
10.1109/ISMICT.2015.7107493
