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Evaluation of the Influence of the Load Resistance on Power and Efficiency in the Square and Circular Periodic WPT Systems

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  • Jacek Maciej Stankiewicz

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

Abstract

We are currently seeing an increasing number of devices that support wireless power transfer (WPT) technology. In order to avoid early prototyping and carry out a series of experimental analyses, it was possible to use numerical methods at the design stage to estimate the potential power transfer and efficiency of the system. The purpose of this study is to present a method of analysis for a periodic wireless power transfer system, using periodically arranged planar coils with field and circuit models. A three-dimensional numerical model of a multi-segment charging system with periodic boundary conditions was solved with the finite element method (FEM). An equivalent circuit model of the periodic WPT system was proposed, and the required lumped parameters were obtained using analytical formulas. Mathematical formulas were supplemented with the analysis of several geometric variants, taking into account different sizes of transmitting and receiving coils, as well as different numbers of turns. Both proposed methods of analysis allowed for the determination of load resistance values at which the variants of WPT systems considered in the research had maximum efficiency. The ranges of load resistance values in which the efficiency of the system exceeded 50% were indicated. The results obtained are very helpful in the proper selection of the load resistance, without the need for multiple tests and their resulting multiple measurements. The results also showed that the proposed circuit model was able to achieve similar accuracy as the numerical model, and the complexity of the model and analysis was significantly reduced. The obtained results will allow the design of WPT systems with appropriate selections of load resistance to achieve maximum efficiency.

Suggested Citation

  • Jacek Maciej Stankiewicz, 2023. "Evaluation of the Influence of the Load Resistance on Power and Efficiency in the Square and Circular Periodic WPT Systems," Energies, MDPI, vol. 16(7), pages 1-19, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:2950-:d:1105609
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    References listed on IDEAS

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    1. Jacek Maciej Stankiewicz & Agnieszka Choroszucho, 2021. "Comparison of the Efficiency and Load Power in Periodic Wireless Power Transfer Systems with Circular and Square Planar Coils," Energies, MDPI, vol. 14(16), pages 1-24, August.
    2. Jacek Maciej Stankiewicz & Agnieszka Choroszucho, 2021. "Efficiency of the Wireless Power Transfer System with Planar Coils in the Periodic and Aperiodic Systems," Energies, MDPI, vol. 15(1), pages 1-27, December.
    3. Yuyu Geng & Tao Wang & Shiyun Xie & Yi Yang, 2022. "Analysis and Design of Wireless Power Transfer Systems Applied to Electrical Vehicle Supercapacitor Charge Using Variable-Resistance-Based Method," Energies, MDPI, vol. 15(16), pages 1-15, August.
    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. Adam Steckiewicz & Jacek Maciej Stankiewicz & Agnieszka Choroszucho, 2020. "Numerical and Circuit Modeling of the Low-Power Periodic WPT Systems," Energies, MDPI, vol. 13(10), pages 1-17, May.
    6. Ruikun Mai & Liwen Lu & Yong Li & Tianren Lin & Zhengyou He, 2017. "Circulating Current Reduction Strategy for Parallel-Connected Inverters Based IPT Systems," Energies, MDPI, vol. 10(3), pages 1-17, February.
    7. Adam Steckiewicz & Agnieszka Choroszucho, 2019. "Optimization-based synthesis of a metamaterial electric cloak using nonhomogeneous composite materials," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 33(14), pages 1933-1941, September.
    8. Matjaz Rozman & Michael Fernando & Bamidele Adebisi & Khaled M. Rabie & Tim Collins & Rupak Kharel & Augustine Ikpehai, 2017. "A New Technique for Reducing Size of a WPT System Using Two-Loop Strongly-Resonant Inductors," Energies, MDPI, vol. 10(10), pages 1-18, October.
    9. Zbigniew Sołjan & Maciej Zajkowski, 2022. "Extension and Correction of Budeanu Power Theory Based on Currents’ Physical Components (CPC) Theory for Single-Phase Systems," Energies, MDPI, vol. 15(21), pages 1-18, November.
    10. Yang Yang & Mohamed El Baghdadi & Yuanfeng Lan & Yassine Benomar & Joeri Van Mierlo & Omar Hegazy, 2018. "Design Methodology, Modeling, and Comparative Study of Wireless Power Transfer Systems for Electric Vehicles," Energies, MDPI, vol. 11(7), pages 1-22, July.
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