Analysis and Optimized Design of Metamaterials for Mid-Range Wireless Power Transfer Using a Class-E RF Power Amplifier

Chen, Rong; Xiong, Tingting; Lu, Conghui; Hu, Zhenzhong; Huang, Xiutao; Zeng, Yingqin; Liu, Minghai

doi:10.3390/app9010026

Cited by 12 publications

(10 citation statements)

References 29 publications

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“…However, it is also worth studying the MNM-MMs operating at the lower megahertz range. Rong et al [18] researched and built a set of WPT systems with MNM-MMs working at 2.8 MHz. The MNM-MM can improve the PTE by 18.58% under the best case.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

Zeng

Chen

et al. 2021

Energies

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In a wireless power transfer (WPT) system, the power transfer efficiency (PTE) decreases sharply with the increase in transfer distance. Metamaterials (MMs) have shown great potential to enhance PTE in mid-range WPT systems. In this paper, we propose two MM slabs of a 3 × 3 array to enhance the magnetic coupling. The MM unit cell was designed by using square spiral patterns on a thin printed circuit board (PCB). Moreover, the asymmetric four-coil WPT system was designed and built based on the practical application scenario of wireless charging for unmanned devices. The simulation and experimental results show that two MM slabs can enhance power transmission capability better than one MM slab. By optimizing the position and spacing of two MM slabs, the PTE was significantly improved at a mid-range distance. The measured PTEs of a system with two MM slabs can reach 72.05%, 64.33% and 49.63% at transfer distances of 80, 100 and 120 cm. When the transfer distance is 100 cm, the PTE of a system with MMs is 33.83% higher than that without MMs. Furthermore, the receiving and load coils were integrated, and the effect of coil offset on PTE was studied.

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Section: Introductionmentioning

confidence: 99%

“…Rong et al [18] researched and built a set of WPT systems with MNM-MMs working at 2.8 MHz. The MNM-MM can improve the PTE by 18.58% under the best case. However, the PTE improvement obtained by using the MMs is low.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

Zeng

Chen

et al. 2021

Energies

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“…MID technology has become well-known because of its freedom of geometric design in combination with selective structuring and metallization of 3D layout. It is able to define the angle between components, stacking of chips and foaming of cavities in contrast to the traditional printed circuit boards (PCBs) that are two-dimensional one [ 6 , 7 , 8 , 9 , 10 , 11 ]. Moreover, MIDs not only reduce the number of components and the cost by the embedding parts such as connector within a single device but also may save space and shorten assembly time.…”

Section: Introductionmentioning

confidence: 99%

3D-MID Technology for Surface Modification of Polymer-Based Composites: A Comprehensive Review

et al. 2020

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The three-dimensional molded interconnected device (3D-MID) has received considerable attention because of the growing demand for greater functionality and miniaturization of electronic parts. Polymer based composite are the primary choice to be used as substrate. These materials enable flexibility in production from macro to micro-MID products, high fracture toughness when subjected to mechanical loading, and they are lightweight. This survey proposes a detailed review of different types of 3D-MID modules, also presents the requirement criteria for manufacture a polymer substrate and the main surface modification techniques used to enhance the polymer substrate. The findings presented here allow to fundamentally understand the concept of 3D-MID, which can be used to manufacture a novel polymer composite substrate.

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“…Electromagnetic metamaterials have strong magnetic field control capabilities [ 17 , 18 ]. Many studies have shown that electromagnetic metamaterials can enhance the resonant coil coupling of WPTs and solve the electromagnetic leakage problem [ 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Stability of Medium Range and Misalignment Wireless Power Transfer System by Negative Magnetic Metamaterials

et al. 2020

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The misalignment of the resonant coils in wireless power transfer (WPT) systems causes a sharp decrease in transfer efficiency. This paper presents a method which improves the misalignment tolerance of WPT systems. Based on electromagnetic simulations, the structural unit parameters of the electromagnetic material were extracted, and an experimental prototype of a four-coil WPT system was built. The influence of electromagnetic metamaterials on the WPT system under the conditions of lateral misalignment and angular offset was investigated. Experiments showed that the transfer efficiency of the system could be maintained above 45% when the transfer distance of the WPT system with electromagnetic metamaterials was 1 m and the resonant coils were shifted laterally within one coil diameter. Furthermore, the system transfer efficiency could be stabilized by more than 40% within an angle variation range of 70 degrees. Under the same conditions, the transfer efficiency of a system without electromagnetic metamaterials was as low as 30% when lateral migration occurred, and less than 25% when the angle changed. This comparison shows that the stability of the WPT system loaded with electromagnetic metamaterials was significantly enhanced.

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Analysis and Optimized Design of Metamaterials for Mid-Range Wireless Power Transfer Using a Class-E RF Power Amplifier

Cited by 12 publications

References 29 publications

Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

3D-MID Technology for Surface Modification of Polymer-Based Composites: A Comprehensive Review

Enhancing the Stability of Medium Range and Misalignment Wireless Power Transfer System by Negative Magnetic Metamaterials

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