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Analysis of Simultaneous WPT in Ultra-Low-Power Systems with Multiple Resonating Planar Coils

Author

Listed:
  • Jacek Maciej Stankiewicz

    (Department of Electrical Engineering, Power Electronics and Power Engineering, Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Str., 15-351 Bialystok, Poland)

  • Adam Steckiewicz

    (Department of Electrical Engineering, Power Electronics and Power Engineering, Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Str., 15-351 Bialystok, Poland)

  • Agnieszka Choroszucho

    (Department of Electrical Engineering, Power Electronics and Power Engineering, Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Str., 15-351 Bialystok, Poland)

Abstract

This paper analyses the conceptual application of a wireless power transfer (WPT) system with multiple resonators supplying outdoor sensors using a mobile charger. The solution is based on the idea of using sensors, located in open space, to monitor environmental parameters. Instead of the typical two-coil WPT with a single charger, energy transfer is realized simultaneously, using a group of identical planar coils as transmitters and receivers connected to the independent power supply circuits of each sensor and microcontroller. By isolating these charged circuits, a higher reliability and powering flexibility of the weather station can be achieved. The concept of the proposed system was discussed, and it was proposed to include the main devices in it. A theoretical analysis was performed considering all mutual couplings and the skin effect; hence, the system is characterized by a matrix equation and sufficient formulae are given. The calculations were verified experimentally for different frequencies, two possible distances between the transmitters and receivers, and equivalent loads. Both the efficiency and load power are compared and discussed, showing that this solution can provide power to ultra-low-power devices, yet the efficiency must still be improved. At the small distance between the transmitting and receiving coils (5 mm), the maximum efficiency value was about 40%, with a load resistance of 10 Ω. By doubling the distance between the coils, the efficiency of the WPT system decreased by three times.

Suggested Citation

  • Jacek Maciej Stankiewicz & Adam Steckiewicz & Agnieszka Choroszucho, 2023. "Analysis of Simultaneous WPT in Ultra-Low-Power Systems with Multiple Resonating Planar Coils," Energies, MDPI, vol. 16(12), pages 1-17, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:12:p:4597-:d:1166962
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    References listed on IDEAS

    as
    1. Safa Zouaoui & Wael Dghais & Rui Melicio & Hamdi Belgacem, 2020. "Omnidirectional WPT and Data Communication for Electric Air Vehicles: Feasibility Study," Energies, MDPI, vol. 13(24), pages 1-19, December.
    2. Shuo Liu & Jianhui Su & Jidong Lai, 2019. "Accurate Expressions of Mutual Inductance and Their Calculation of Archimedean Spiral Coils," Energies, MDPI, vol. 12(10), pages 1-14, May.
    3. Mohamad Abou Houran & Xu Yang & Wenjie Chen, 2018. "Free Angular-Positioning Wireless Power Transfer Using a Spherical Joint," Energies, MDPI, vol. 11(12), pages 1-26, December.
    4. 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.
    5. 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.
    6. Saeideh Pahlavan & Mostafa Shooshtari & Shahin Jafarabadi Ashtiani, 2022. "Star-Shaped Coils in the Transmitter Array for Receiver Rotation Tolerance in Free-Moving Wireless Power Transfer Applications," Energies, MDPI, vol. 15(22), pages 1-13, November.
    7. Benitto Albert Rayan & Umashankar Subramaniam & S. Balamurugan, 2023. "Wireless Power Transfer in Electric Vehicles: A Review on Compensation Topologies, Coil Structures, and Safety Aspects," Energies, MDPI, vol. 16(7), pages 1-46, March.
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