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

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  • Jacek Maciej Stankiewicz

    (Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland)

Abstract

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.

Suggested Citation

  • Jacek Maciej Stankiewicz, 2023. "Analysis of the Wireless Power Transfer System Using a Finite Grid of Planar Circular Coils," Energies, MDPI, vol. 16(22), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:22:p:7651-:d:1283174
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    References listed on IDEAS

    as
    1. Sun, Longzhao & Ma, Dianguang & Tang, Houjun, 2018. "A review of recent trends in wireless power transfer technology and its applications in electric vehicle wireless charging," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 490-503.
    2. Jacek Maciej Stankiewicz, 2023. "Analysis of the Influence of the Skin Effect on the Efficiency and Power of the Receiver in the Periodic WPT System," Energies, MDPI, vol. 16(4), pages 1-22, February.
    3. Zhaoyang Yuan & Qingxin Yang & Xian Zhang & Xianjie Ma & Ran Wang & Ming Xue & Pengcheng Zhang, 2023. "A Misalignment Tolerate Integrated S-S-S-Compensated WPT System with Constant Current Output," Energies, MDPI, vol. 16(6), pages 1-18, March.
    4. Jacek Maciej Stankiewicz, 2023. "Estimation of the Influence of the Coil Resistance on the Power and Efficiency of the WPT System," Energies, MDPI, vol. 16(17), pages 1-22, August.
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