Skin-Parallel Type Transcutaneous Energy Transmission Transformer Considering the Biological Effects of Electromagnetic Fields

In this study, we created a skin-parallel type transcutaneous transmission system for a ventricular assist device using plate-shaped solenoid as the transmitting coil. We compared the biological effects and radiated magnetic fields of six models in which two receiving coils were placed in series and in parallel. The results showed that the power transmission efficiency was around 90% for all models, and there was no major difference between the two layouts. It was also found that by placing two receiving coils in parallel and separating them by 10 mm (Type D), was possible to suppress the electric field strength within the body Ein by more than 10 V/m. However, the limit value was exceeded by placing two receiving coils in series and separating them by 0.5 mm. In addition, the local SAR for Type D was 1.2595 W/kg, which was below the limit value.