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

The Korean Institute of Power Electronics (전력전자학회)
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Single-Stage AC/DC Converter for Wireless Power Transfer Operating With Robustness in Wide Air Gaps

넓은 공극에서 강인성을 가지고 동작하는 단일전력단 무선전력전송 교류-직류 컨버터

  • Woo, Jeong-Won (Dept. of Electrical & Electronics Eng., Jeonju University) ;
  • Jang, Ki-Chan (Dept. of Electrical & Electronics Eng., Jeonju University) ;
  • Kim, Min-Ji (Dept. of Electrical & Electronics Eng., Jeonju University) ;
  • Kim, Eun-Soo (Dept. of Electrical & Electronics Eng., Jeonju University)
  • Received : 2021.01.26
  • Accepted : 2021.02.14
  • Published : 2021.04.20
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Abstract

In the field of electric vehicles and AGVs, wireless power transfer (WPT) charging systems have been developed recently because of its convenience, reliability, and positive environmental impact due to cable and cord elimination. In this study, we propose a WPT charging system using a single stage AC-DC converter that can be reduced in size and weight and thus can ensure convenience. The proposed single-stage AC-DC converter can control a wide output voltage (36-54 VDC) within coupling ranges by using the variable link voltage applied to the WPT resonant circuit through phase-shifted modulation at a fixed switching frequency. Moreover, the input power factor and total harmonic distortion can be improved by using the proposed converter. A 1 kW prototype that can operate with an air gap range of 40-50 mm is fabricated and validated through experimental results and analysis.

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References

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