전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제22권6호
  • /
  • Pages.469-475
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  • 2017
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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누설집중형 변압기를 이용한 전계결합형 무선전력전송 시스템의 부피저감 최적설계 연구

Optimal Design of Volume Reduction for Capacitive-coupled Wireless Power Transfer System using Leakage-enhanced Transformer

  • 투고 : 2017.08.14
  • 심사 : 2017.09.27
  • 발행 : 2017.12.20
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초록

Using impedance matching techniques as a way to increase system power transferability in capacitive wireless power transmission has been widely investigated in conventional studies. However, these techniques tend to increase the circuit volume and thus counterbalance the advantage of the simplicity in the energy link structure. In this paper, a compact circuit topology with one leakage-enhanced transformer is proposed in order to minimize the circuit volume for the capacitive power transfer system. This topology achieves a reactive compensation, and the system quality factor value can be reduced by the turn ratio. As a result, this topology not only reduces the overall system volume but also minimizes the voltage stress of the link capacitor. An optimal design guideline for the leakage-enhanced transformer is also presented. The advantages of the proposed scheme over the conventional method in terms of power efficiency and circuit volume are revealed through an analytic comparison. The feasibility of applying the new topology is also verified by conducting 50 W hardware tests.

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참고문헌

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