Abstract
Achieving three-dimensional (3D) omnidirectional wireless power transfer (OWPT) without any active control is challenging. This paper proposes a square polyhedron transmitter (SPTx) based on the reverse current of parallel coil, which can create a 3D omnidirectional magnetic field. To minimize the counteracting of the reverse magnetic field, each coil is equipped with magnetic shielding material. The coils of SPTx are connected in series and excited by a single power supply without any current amplitude or phase control circuits. The performance of SPTx system is validated with different receivers (Rx) by experiments. In the experiment with dual Rxs, the maximum transmission efficiency is 79.6% with an efficiency stability rate of 49%. In addition, the output power does not affect the efficiency, and more Rxs will increase transmission efficiency.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China under Grant 52074305 and 51874300.
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Zhao, Y., Guo, B., Tian, Z. et al. Square Polyhedron Transmitter for Three-Dimensional Omnidirectional Wireless Power Transfer. Arab J Sci Eng 49, 6577–6586 (2024). https://doi.org/10.1007/s13369-023-08346-y
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DOI: https://doi.org/10.1007/s13369-023-08346-y