Optimal Design of Wireless Power Transfer System Based on Spherical Motion Device

Li, Zheng; Xie, Bo; Zhu, Yaguang; Sun, Hexu

doi:10.1109/access.2021.3117504

Cited by 4 publications

(3 citation statements)

References 17 publications

(15 reference statements)

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“…Among the four basic compensation circuits in WPT system, the S-S type compensation network has been widely used because of its simple structure and good robustness, but when the mutual inductance decreases due to the offset of the transceiver side coil, its transmission power, and transmission efficiency will be significantly reduced, which has a greater impact on the transmission performance [14,15]. In this paper, an LCC/S-S self-switching system is designed based on this compensation network, and by using the S-S compensation structure in the WPT system with low coupling and high power output, and the LCC-S compensation network with high coupling and high power output, the power fluctuation of WPT system in the offset state is reduced and the transmission performance of the system is improved.…”

Section: Working Principle Analysismentioning

confidence: 99%

Wireless Charging Constant Power Output System Based on LCC/S-S Self-Switching

Xie

Zhu

et al. 2022

IEEE Access

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Conventional wireless charging systems cause output power fluctuations during the offset process, and a single topology can cause power reduction or a large impact on the wireless charging network as the coupling mutual inductance changes. For this reason, in this paper, by combining LCC-S and S-S topologies, the high output characteristics of the S-S topology network in the low coupling state and the high output characteristics of the LCC-S topology network in the protection and high coupling in the very low coupling, the power output in the offset state is greatly maintained by combining with the voltage regulation circuit. In this paper, firstly, the theoretical derivation of the working principle of the designed topology is carried out, then the mutual inductance variation range generated by the offset state of the coil is found through finite element simulation, and the accuracy of the theoretical derivation is verified by building a constant power output model of the self-switching system using matlab, and finally, an experimental platform for wireless power transmission is built, and the experimental results confirm that the system power can be maintained within a certain offset range The output fluctuation is within 5%, which verifies the feasibility and realism of the design.

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Section: Working Principle Analysismentioning

confidence: 99%

Wireless Charging Constant Power Output System Based on LCC/S-S Self-Switching

Xie

Zhu

et al. 2022

IEEE Access

Self Cite

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“…It proved that the coupling coefficient peak value of the new structure was increased by 12.68%, and the variation fluctuation was reduced by 2.26% when the deflection range was 20°. However, the efficiency dropped rapidly as increasing the deflection angle 11 . In 2022, Huilin An solved the misalignment problem of wireless power transmission and designed the omnidirectional receiver with multi‐coil.…”

Section: Introductionmentioning

confidence: 99%

“…However, the efficiency dropped rapidly as increasing the deflection angle. 11 In 2022, Huilin An solved the misalignment problem of wireless power transmission and designed the omnidirectional receiver with multi-coil. However, there are two problems unsolved.…”

mentioning

confidence: 99%

Long‐distance and anti‐disturbance wireless power transfer based on concentric three‐coil resonator and inhomogeneous electromagnetic metamaterials

Yuan

et al. 2023

Circuit Theory & Apps

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For wireless power transfer system (WPTS), the deflection of the resonant coil and the increase of the transmission distance will cause a sharp decline in transmission efficiency. This paper presents a novel long-distance and anti-deflection wireless power transfer based on concentric three-coil resonator and inhomogeneous electromagnetic metamaterials (IEM). First, the effective receiving area of the resonator is analyzed, and the anti-disturbance concentric three-coil resonator is designed quantitatively. Considering the magnetic field distribution generated by the transmitting coil, this paper proposes and designs IEM with three kinds of effective permeability, which is applied in different design area, respectively. Meanwhile, the finite-element-method simulation proves an improvement in magnetic field modulation and flux leakage control when WPTS with IEM is used. The experimental results show that, compared with the traditional one-coil to one-coil, the WPTS designed in this paper achieves an increase of 43% in the efficiency at a 90 deflection. Furthermore, the efficiency of WPTS with IEM is 17% and 7% higher than that of WPTS with homogeneous electromagnetic metamaterials (HEM) and without electromagnetic metamaterials. As a result, the design method in this paper can improve the anti-disturbance capability and increase the transmission distance and efficiency.

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