A Review of Metamaterials in Wireless Power Transfer

Rong, Cancan; Yan, Lihui; Li, Long; Li, Yunhui; Liu, Minghai

doi:10.3390/ma16176008

Cited by 12 publications

(3 citation statements)

References 121 publications

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“…Magnetic field shielding can be classified as material shielding [8][9][10][11][12][13] and coil shielding for material shielding, and the high conductivity of copper and aluminum metal plates will lead to eddy current losses, significantly reducing system efficiency. Adopting high permeability low-loss ferrite materials can enhance the system's performance and reduce the magnetic field leakage between systems.…”

Section: Introductionmentioning

confidence: 99%

Research on Resonant Wireless Energy Supply Circular Reactive Shielding for Small Electronic Equipment

Peng,

Tidiani,

Cao

et al. 2024

PIER C

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A reactive power shielding structure working under 150 kHz for small electronic equipment was proposed to reduce the electromagnetic leakage of WPT system. First, the model of LCC-LCC compensation circuit was established. By ensuring transmission efficiency, a comprehensive analysis of nine sets of computational data results was conducted to select the scheme with the best shielding effect. The experimental results showed that the magnetic flux density attenuation was 27.82% at 41 mm transmission distance from the center under the optimal structure of 3 rings and 7 turns, inner diameter of 23 mm, and outer diameter of 35 mm. The transmission efficiency can reach 76.73%, which is only 1.32% lower than the situation without shielding. The proposed reactive power shielding structure can significantly reduce the magnetic flux density in the external area of the WPT system without affecting the transmission efficiency of the system.

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Section: Introductionmentioning

confidence: 99%

Research on Resonant Wireless Energy Supply Circular Reactive Shielding for Small Electronic Equipment

Peng,

Tidiani,

Cao

et al. 2024

PIER C

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“…Although WPT technology has many applications, the increasing power transmission distance often results in a decrease in transmission efficiency, as well as an urgent need to address safety concerns. Metamaterials offer a way to improve efficiency and reduce flux density in WPT systems [31,32]. The authors of [31] present an overview of the status and technological challenges facing metamaterial-based WPT systems.…”

Section: Introductionmentioning

confidence: 99%

“…Metamaterials offer a way to improve efficiency and reduce flux density in WPT systems [31,32]. The authors of [31] present an overview of the status and technological challenges facing metamaterial-based WPT systems. The paper reviews a metamaterial-based wireless energy transmission system from three perspectives: transmission efficiency, misalignment tolerance, and electromagnetic shielding.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Wireless Power Transfer System Using a Finite Grid of Planar Circular Coils

Stankiewicz

2023

Energies

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In this paper was analysed a wireless power transfer system (WPT) with multiple resonators supplying, for example, sensors or LED lighting. Energy is transferred simultaneously using a group of identical planar spiral circular coils acting as transmitters and receivers. These coils were arranged to form transmitting and receiving planes. The receivers were connected to independent power supply circuits of each, e.g., sensor or LED lighting. Higher power reliability and flexibility can be achieved by isolating these circuits. The proposed system was described and discussed. Taking into account the skin effect and mutual couplings, a theoretical analysis was made. A detailed analysis was made at the resonant frequency of the system. The system was modeled using a matrix equation and appropriate formulas. The calculations were verified experimentally for different loads and two distances between transmitters and receivers. The efficiency and receiver power were compared and discussed. The maximum efficiency was about 45% at the small distance between the planes. The maximum efficiency of the WPT system decreased more than two times to less than 20% when the distance between the coils was doubled. The results and discussion of the conducted analysis may provide valuable knowledge when designing this type of system.

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Enhanced efficiency of magnetic resonant wireless power transfer system using rollable and foldable metasurface based on polyimide substrate

Hiep,

Bui,

Tung

et al. 2024

Appl. Phys. A

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A Review of Metamaterials in Wireless Power Transfer

Cited by 12 publications

References 121 publications

Research on Resonant Wireless Energy Supply Circular Reactive Shielding for Small Electronic Equipment

Research on Resonant Wireless Energy Supply Circular Reactive Shielding for Small Electronic Equipment

Analysis of the Wireless Power Transfer System Using a Finite Grid of Planar Circular Coils

Enhanced efficiency of magnetic resonant wireless power transfer system using rollable and foldable metasurface based on polyimide substrate

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