2020 Volume 28 Issue 4 Pages 271-275
The magnetic resonant wireless power transfer (WPT) system has been applied to electrically-driven mobile systems. Although the magnetic resonant WPT system is relatively robust against the misalignment between a transfer (Tx) coil and receiver (Rx) coil, it is difficult to keep the energy transfer when the relative position of the coils changes significantly. This will be a technical issue in the WPT for wearable and implantable devices. To solve this, WPT system with a function of human tracking has been proposed. A simple and fast algorithm using the gradient ascent to calculate optimal coil position based on the position and attitude of a Rx coil was developed. In this paper, basic principle of this system and evaluation results are introduced.
