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Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range

Author

Listed:
  • Yanwei Jiang

    (School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China)

  • Xiaoguang Zhao

    (School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China)

  • Dongliang Chen

    (State Grid Fujian Electric Power Co., Ltd. Zhangping Power Supply Company, Longyan 364400, China)

  • Xujian Shu

    (School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China)

  • Yang Zhou

    (School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China)

Abstract

In this paper, an autonomous wireless power transfer (WPT) system with constant voltage output in a wide load range is presented. Here, combining self-oscillating control and phase-shift control, a new implementation of the autonomous WPT system is proposed. The proposed autonomous WPT system operates using a self-oscillating control method in the strong coupling region, which can automatically maintain the constant output voltage. In the weak coupling region, a phase-shift control method with a fixed frequency and a variable duty cycle is implemented, and a control strategy based on output voltage estimation is proposed to obtain the constant output voltage. In addition, according to the operating frequency characteristic of the proposed autonomous WPT system, a corresponding coupling region judgment method is presented to guarantee the realization of switching between the two control methods. An experimental prototype with a 24 V output voltage is constructed to validate the practicability of the proposed method. The experimental results show the proposed autonomous WPT system can obtain constant output voltage in a wide load range.

Suggested Citation

  • Yanwei Jiang & Xiaoguang Zhao & Dongliang Chen & Xujian Shu & Yang Zhou, 2023. "Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range," Energies, MDPI, vol. 16(24), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:24:p:8026-:d:1298643
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    References listed on IDEAS

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    1. Sid Assawaworrarit & Xiaofang Yu & Shanhui Fan, 2017. "Robust wireless power transfer using a nonlinear parity–time-symmetric circuit," Nature, Nature, vol. 546(7658), pages 387-390, June.
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