Design and Analysis of Misalignment Insensitive Wireless Power Transfer System Based on Multitransmitter for Constant Power

This paper proposes a multiple transmitting array wireless power transfer (MTA-WPT) system with constant output power charging for consumer electronics, such as tablets and mobile phones. Compared to conventional WPT systems, this proposed system can achieve constant output power by controlling the...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2023-08, Vol.11 (4), p.1-1
Main Authors: Li, Xingfei, Sun, Boxiang, Xu, Jiayi, Pang, Shui, Li, Hongyu
Format: Article
Language:English
Subjects:
Cell phones
Circuits
Coils
Constant output power
Current distribution
current distribution strategy
Electrons
Inductance
Integrated circuit modeling
Misalignment
Modulation
multiple transmitting coils
Phase modulation
Phase shift
phase shift modulation
Power consumption
Power generation
Resistance
Three-dimensional displays
Topology
Transmission efficiency
Voltage
wireless power transfer
Wireless power transmission
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Summary:This paper proposes a multiple transmitting array wireless power transfer (MTA-WPT) system with constant output power charging for consumer electronics, such as tablets and mobile phones. Compared to conventional WPT systems, this proposed system can achieve constant output power by controlling the current phase shift of the transmitting (Tx) coils when the receive (Rx) coil is located at different positions and directions. The detailed circuit topology of the proposed system is modeled and analyzed to obtain the correspondence between the current phase shift and load output power. Furthermore, the excitation current distribution strategies for a system of three and four Tx coils at optimized efficiency are theoretically analyzed. The simulation demonstrates that the proposed system can achieve constant output power with modulating the phase shift at various Rx sites. Finally, an experimental prototype with four Tx coils is designed and carried out to prove the effectiveness of the phase shift modulation method and current distribution strategy. Besides, the superiority of the proposed MTA-WPT system is verified by comparison with other methodologies. The experimental results show that the output power of Rx at different positions is kept at roughly 41W with the transmission efficiency over 80% by the Tx current phase shift modulation.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2023.3269226