| Title |
Design of a Moving Magnetic Resonance Coil and Controllable Rectifier for Wireless Power Transfer and Position Detection |
| Authors |
김윤우(Yoon Woo Kim) ; 송대건(Taigon Song) ; 최준림(Jun Rim Choi) |
| DOI |
https://doi.org/10.5573/ieie.2021.58.6.32 |
| Keywords |
Wireless Power Transfer; Magnetic Resonance; Position Detection; System on Chip |
| Abstract |
In this paper, we designed a wireless power transmission coil and a position detection system from a moving receiver coil using a magnetic resonance method. The transmitter array coil at the bottom was designed as a hexagonal helical coil for high interface efficiency, and the receiving coil was designed as a circular spiral coil with a diameter of 30mm for uniform power transfer efficiency. The resonance frequency was set to 13.56MHz using a capacitor connected in series to each loop, and the efficiency was optimized from the movement of the receiving coil by the simulation and experiment. The peak efficiency of 80% was measured at the center of the transmitter loop and the position is detected when the efficiency drops down to 50% at the edge of the transmitter coil. The controllable rectifier at the receiver was designed in a 0.18μm CMOS process by adopting various input ranges and shows a wide range of high efficiency for low power biomedical applications. |