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A Position-Insensitive Nonlinear Inductive Power Transfer System Employing Saturable Inductor

Author

Listed:
  • Xu Yang

    (School of Intelligent Manufacturing, Nanyang Institute of Technology, Nanyang 473004, China
    School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Junfeng Yang

    (School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Jing Fan

    (School of Information Engineering, Nanyang Institute of Technology, Nanyang 473004, China)

  • Bao Wang

    (School of Information Engineering, Nanyang Institute of Technology, Nanyang 473004, China)

  • Dingzhen Li

    (School of Information Engineering, Nanyang Institute of Technology, Nanyang 473004, China)

Abstract

Most of the practical inductive power transfer (IPT) systems are the ones with variable coupling coefficients and loads. The output voltage, current and power are affected by the variation in coupling coefficient and load. In this paper, a novel approach based on a nonlinear resonator is proposed to obtain stable output voltage, which is independent of coupling coefficient and load variation. First, the theory and properties of nonlinear resonators are analyzed by Duffing equation. Then, a nonlinear IPT system with a magnetic saturation inductor is proposed, and the saturable inductor modeling and its effect on system performance are further studied. Finally, the experimental prototype is built to validate the effectiveness of the nonlinear IPT system. The experimental results show that when the coupling coefficient varies from 0.32 to 0.24 and the load resistance varies from 80 Ω to 120 Ω , the system works in a nonlinear state, the output voltage ripple is 1.77%, and the overall efficiency of the system is not less than 82.60%. The experimental results are basically consistent with the theoretical analysis. The novel design approach improves the output voltage stability with respect to position misalignment and load variation, and the bandwidth of the system is also enhanced.

Suggested Citation

  • Xu Yang & Junfeng Yang & Jing Fan & Bao Wang & Dingzhen Li, 2023. "A Position-Insensitive Nonlinear Inductive Power Transfer System Employing Saturable Inductor," Energies, MDPI, vol. 16(5), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2430-:d:1087048
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    References listed on IDEAS

    as
    1. Emrullah Aydin & Mehmet Timur Aydemir & Ahmet Aksoz & Mohamed El Baghdadi & Omar Hegazy, 2022. "Inductive Power Transfer for Electric Vehicle Charging Applications: A Comprehensive Review," Energies, MDPI, vol. 15(14), pages 1-24, July.
    2. Eiman ElGhanam & Mohamed Hassan & Ahmed Osman, 2021. "Design of a High Power, LCC-Compensated, Dynamic, Wireless Electric Vehicle Charging System with Improved Misalignment Tolerance," Energies, MDPI, vol. 14(4), pages 1-26, February.
    3. Joseph, Peter K. & Elangovan, D. & Arunkumar, G., 2019. "Linear control of wireless charging for electric bicycles," Applied Energy, Elsevier, vol. 255(C).
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