Watt-level wireless power transmission to multiple compact receivers

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Garraud, A.^1 ; Munzer, D.J.^1 ; Althar, M.^1 ; Garraud, N.^1 ; Arnold, D.P.^1

Interdisciplinary Microsystems Group, Department of Electrical and Computer Engineering, University of Florida, Gainesville

FL

32611, United States^1

关键词: Arbitrary positions;    Low-frequency;    Power densities;    Power levels;    Watt levels;    Wearable devices;    Wireless power transmission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012039/pdf
DOI  :  10.1088/1742-6596/660/1/012039

来源: IOP

【 摘 要 】

This paper reports an electrodynamic wireless power transmission (EWPT) system using a low-frequency (300 Hz) magnetic field to transmit watt-scale power levels to multiple compact receivers. As compared to inductively or resonantly coupled coils, EWPT facilitates transmission to multiple non-interacting receivers with little restriction on their orientation. A single 3.0 cm3receiver achieves 1.25 W power transmission with 8% efficiency at a distance of 1 cm (350 mW/cm3power density) from the transmitter. The same prototype achieves 9 mW at a distance of 9 cm. Moreover, we demonstrate simultaneous recharge of two wearable devices, using two receivers located in arbitrary positions and orientations.