Abstract
Due to large power consumption, the artificial heart is currently supplied power from outside of the body by the cable, which penetrates the skin and causes bacterial infection. Transcutaneous energy transmission system (TETS) has been conducted to solve this problem. Recently, there have been several big challenges in litz wire coil for TETS; a size limit, decline in coupling efficiency by positional deviation between coils, and etc. In this study, we focused on preventing the deviation. We made coils of flexible board to embed it into side chest, a very small region hardly affected by human's motion. The coil was double sided, its thickness 85 um enabled to decrease coil pressure to the body as well as increase choices of implantable site. The coil had 12 wire turns, its diameter was 98.4mm, and its inductance and resistance was 10 uH and 782 mΩ. In addition, formerly we intended to reduce the resistance with coils parallel connected, yet that was interfered by eddy current result from the line width of coil. We insulted 29 slits into each line thereby. As a result, we achieved 27.5 W transmission with three coils parallel connection on condition that the resistance was 318 mΩ.
