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Three-Coil Wireless Charging System Based on S-PS Topology

Author

Listed:
  • Kai Yan

    (Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China)

  • Ruirong Dang

    (Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China)

  • Wenzhen Wang

    (Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China)

Abstract

To protect the battery, radio energy transmission charging typically uses constant current (CC) charging before switching to constant voltage (CV) charging to enhance battery durability. This paper proposes adding an auxiliary clamp coil to the original circuit topology. The IPT battery charger designed with the auxiliary clamp coil can achieve both constant current (CC) and constant voltage (CV) outputs. The mutual inductance between the auxiliary clamp coil and the primary side coil greatly influences the output performance of the entire IPT system, so the auxiliary clamp coil should not be too large. To solve this problem, an S-S-PS circuit with secondary compensation topology in the secondary coil is proposed. This circuit topology reduces the size of the auxiliary clamp coil, allowing it to be placed in an optimal position. When the constant voltage output critical position is reached, the IPT system can still automatically, continuously, and smoothly switch between CC and CV modes. Consequently, this approach avoids increased cost consumption associated with detecting CC-CV switching thresholds, adding wireless transmission communication modules, real-time control of the power transmitter, and active protection of the circuit during constant current charging. Finally, a 48 V/2.5 A prototype was built to verify that the IPT system has CC-CV conversion functionality.

Suggested Citation

  • Kai Yan & Ruirong Dang & Wenzhen Wang, 2024. "Three-Coil Wireless Charging System Based on S-PS Topology," Energies, MDPI, vol. 17(15), pages 1-18, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3606-:d:1440676
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    References listed on IDEAS

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    1. 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.
    2. Frechter, Yotam & Kuperman, Alon, 2020. "Analysis and design of inductive wireless power transfer link for feedback-less power delivery to enclosed compartment," Applied Energy, Elsevier, vol. 278(C).
    3. Cédric Lecluyse & Ben Minnaert & Michael Kleemann, 2021. "A Review of the Current State of Technology of Capacitive Wireless Power Transfer," Energies, MDPI, vol. 14(18), pages 1-22, September.
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