A Dual-Band Negative Permeability and Near-Zero Permeability Metamaterials for Wireless Power Transfer System

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

doi:10.1109/tie.2020.3009608

Cited by 40 publications

(11 citation statements)

References 27 publications

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“…1. More detailed analysis of the WPT system with dual-band metamaterial [90] The dual-band metamaterial with negative or zero permeability display the efficiency improvement and leakage field reduction.…”

Section: Novel Methods For Metamaterials Optimizationmentioning

confidence: 99%

“…According to the study proposed so far, more investigation is needed to conclude the mechanism of the dual-band metamaterial. And the impact of the dual-band metamaterial on efficiency FIGURE 14 Dual-band metamaterial scheme from [90] and magnetic field leakage of the WPT system needs to be accurately evaluated. Moreover, the designed dual-band metamaterials are mostly made of a double-layer structure, which the resonance frequency can be adjusted by self-resonance of the pattern and adding the external capacitance.…”

Section: Multi-band Frequency Metamaterialsmentioning

confidence: 99%

“…The slab with array unit cells is placed between the system and along the axis. In [90], two kinds of dual-band metamaterials are designed, such as permeability with negative and zero at two frequencies, that is, DB-MNG and DB-MNZ, as shown in Figure 14. The system with the designed dual-band metamaterials shows good performance for efficiency enhancement and leakage magnetic field reduction.…”

Section: Multi-band Frequency Metamaterialsmentioning

confidence: 99%

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Development and prospects of metamaterial in wireless power transfer

Huang

Zhang

Cong

et al. 2021

IET Power Electronics

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As a unique group of advanced artificial materials, metamaterials have found many interesting applications in various devices due to the ability to control electromagnetic fields. The metamaterial provides the prospect of new opportunities for the wireless power transfer (WPT) system to improve efficiency and reduce magnetic flux density. This review paper evaluates the performance of the WPT system with metamaterial from both principles and functions aspects. The objectives of this review include: (1) to present the research process and bottlenecks of metamaterial in the WPT system; (2) to clarify the design solution and checking method of the metamaterial and (3) to identify the challenges and opportunities based on the functional of the WPT system integration with metamaterial. Therefore, the process on metamaterial design, working principle of metamaterial, optimal method, equivalent model, and experimental method are reviewed. The recent efforts of the WPT system with metamaterial in efficiency enhancement, misalignments, magnetic field reduction are illustrated. Finally, the challenges and prospects of metamaterial based on the WPT system are concluded.

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Section: Novel Methods For Metamaterials Optimizationmentioning

confidence: 99%

Section: Multi-band Frequency Metamaterialsmentioning

confidence: 99%

Section: Multi-band Frequency Metamaterialsmentioning

confidence: 99%

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Development and prospects of metamaterial in wireless power transfer

Huang

Zhang

Cong

et al. 2021

IET Power Electronics

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“…Previous studies have shown that both magnetic field focusing and evanescent wave amplification can be achieved by NMM. At the same time, the research presented in [ 14 , 15 ] described a method whereby NMM can be realized by adjusting the structural parameters of the material units. The structural parameters of the NMM unit in this paper were obtained through a large number of simulations.…”

Section: Theoretical Analysis and Simulationmentioning

confidence: 99%

“…A new structure using metamaterials was designed to improve the transfer efficiency, increasing efficiency by 28% [ 14 ]. In [ 15 ], a dual band metamaterial is proposed for use in portable devices, shielding the leakage magnetic field and focusing on the magnetic field. Metamaterials with a cavity can form a magnetic field in the field localization, providing power only to the intended localized zone [ 16 ].…”

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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Uncommon Ways of Shielding

2022

Electromagnetic Shielding

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A Dual-Band Negative Permeability and Near-Zero Permeability Metamaterials for Wireless Power Transfer System

Cited by 40 publications

References 27 publications

Development and prospects of metamaterial in wireless power transfer

Development and prospects of metamaterial in wireless power transfer

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

Uncommon Ways of Shielding

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