A Spatial Wireless Power Transfer System Based on Parity-Time Symmetry

Aiming at the problem that the angle and position changes of the receiver coil result in load power fluctuation and low transfer efficiency, a spatial wireless power transfer (WPT) system based on parity-time (PT) symmetry is proposed. Firstly, the mathematical model of the square circular transmitt...

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Bibliographic Details
Published in2023 3rd International Conference on New Energy and Power Engineering (ICNEPE) pp. 742 - 747
Main Authors Xu, Xingpeng, Guo, Feng, He, Xiyu
Format Conference Proceeding
LanguageEnglish
Published IEEE 24.11.2023
Subjects
Coils
Fluctuations
frequency bifurcation
parity-time symmetry
Periodic structures
Prototypes
Receivers
spatial wireless power transfer
Switches
switching
Wireless power transfer
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Summary:Aiming at the problem that the angle and position changes of the receiver coil result in load power fluctuation and low transfer efficiency, a spatial wireless power transfer (WPT) system based on parity-time (PT) symmetry is proposed. Firstly, the mathematical model of the square circular transmitting coil mechanism is established. Then, the operating frequency and transmission characteristics of the WPT system of PT symmetrical with the series-series (SS) compensation are analyzed based on the primary-side coil switching strategy and circuit theory in the whole coupling region. According to the phenomenon of frequency bifurcation in the PT symmetry region, a strategy is proposed to switch primary edge frequency coils. Finally, the experimental prototype is built to show when the receiver coil in the three-dimensional space satisfies the frequency condition, load power is stable at 18 W, accompanied by more than 80% system transfer efficiency and power fluctuation of less than 1.2 W.
DOI:10.1109/ICNEPE60694.2023.10429343