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Open AccessArticle
A Single-Transmitter Multi-Receiver Wireless Power Transfer System with High Coil Misalignment Tolerance and Variable Power Allocation Ratios
by
Yanting Luo
Yanting Luo *,
Zhuoyue Dai
Zhuoyue Dai and
Yongmin Yang
Yongmin Yang
National Key Laboratory of Equipment State Sensing and Smart Support, College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China
*
Author to whom correspondence should be addressed.
Electronics 2024, 13(19), 3838; https://doi.org/10.3390/electronics13193838 (registering DOI)
Submission received: 6 August 2024
/
Revised: 12 September 2024
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Accepted: 25 September 2024
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Published: 28 September 2024
Abstract
This article proposes a single-transmitter multi-receiver wireless power transfer (STMR-WPT) system, which uses a cross-overlapped bipolar coil as the transmitter and multiple square unipolar coils as the receivers. By using this structure, the magnetic field of the system can be adjusted to accommodate different coil misalignment conditions. In addition, the proposed system uses C-CLCs networks to achieve separate load power allocation. Thus, relay coils, complex multi-frequency transmission channels and multiple independent power supplies can be avoided. A mapping impedance-based circuit model was established to analyze the characteristics of the system, and then a single-frequency power allocation method was presented. Through this method, the STMR-WPT system can achieve load power allocation at any specified ratios under different mutual inductance and load impedance conditions. Finally, an experimental STMR-WPT system was built. The side lengths of the transmitter and receiver coils are 400 mm and 160 mm, respectively. The measurement results indicated that when the lateral or longitudinal coil misalignment varies within the range of 0~200 mm, the coupling coefficient decreases by a maximum of 6% compared to the initial value, and when the angular coil misalignment varies within the range of 0~90 degrees, the coupling coefficient decreases by a maximum of 22% compared to the initial value. In four different power allocation scenarios, the experimental STMR-WPT system successfully achieved the expected power allocation goals.
Share and Cite
MDPI and ACS Style
Luo, Y.; Dai, Z.; Yang, Y.
A Single-Transmitter Multi-Receiver Wireless Power Transfer System with High Coil Misalignment Tolerance and Variable Power Allocation Ratios. Electronics 2024, 13, 3838.
https://doi.org/10.3390/electronics13193838
AMA Style
Luo Y, Dai Z, Yang Y.
A Single-Transmitter Multi-Receiver Wireless Power Transfer System with High Coil Misalignment Tolerance and Variable Power Allocation Ratios. Electronics. 2024; 13(19):3838.
https://doi.org/10.3390/electronics13193838
Chicago/Turabian Style
Luo, Yanting, Zhuoyue Dai, and Yongmin Yang.
2024. "A Single-Transmitter Multi-Receiver Wireless Power Transfer System with High Coil Misalignment Tolerance and Variable Power Allocation Ratios" Electronics 13, no. 19: 3838.
https://doi.org/10.3390/electronics13193838
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