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Pulse Width Modulation-Controlled Switching Impedance for Wireless Power Transfer

Author

Listed:
  • Bole Ma

    (College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)

  • Lin Chai

    (College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)

  • Jianghua Lu

    (College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)

  • Shixiong Sun

    (College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)

Abstract

The exceptional performance of the wireless power transfer (WPT) system hinges on its resonant state. However, the capacitance drift caused by manufacturing tolerance and temperature will result in a state of detuning. In this manuscript, a PWM-controlled switched impedance (PCSI) topology that can express inductive and capacitive is proposed to eliminate line mismatches resulting from the above factors. Firstly, the PCSI topology is introduced, and its placement is determined based on the characteristics of the inductor–capacitor–capacitor series (LCC-S) network. Secondly, the working principle of the proposed topology is introduced. Finally, the simulation and experimental results show that the system could be restored to its resonant state by adjusting the PCSI topology. Under different values of resonant capacitors, the PCSI topology enhances the output power of the system by 40 W~150 W compared to the previous state, and the efficiency is increased by 9~13%.

Suggested Citation

  • Bole Ma & Lin Chai & Jianghua Lu & Shixiong Sun, 2023. "Pulse Width Modulation-Controlled Switching Impedance for Wireless Power Transfer," Energies, MDPI, vol. 16(24), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:24:p:8103-:d:1301638
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