15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications | |
Watt-level wireless power transmission to multiple compact receivers | |
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 |
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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.
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Watt-level wireless power transmission to multiple compact receivers | 1095KB | download |