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

The Korean Institute of Power Electronics (전력전자학회)
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Wireless Power Charging System Capable of Soft-Switching Operation Even in Wide Air Gaps

넓은 공극범위에서 소프트스위칭 동작하는 무선전력 충전시스템

  • Yu-Jin, Moon (Electrical & Electronics Engineering, Jeonju University) ;
  • Jeong-Won, Woo (Electrical & Electronics Engineering, Jeonju University) ;
  • Eun-Soo, Kim (Dept. of Electrical & Electronics Engineering, Jeonju University) ;
  • In-Gab, Hwang (Electrical & Electronics Engineering, Jeonju University) ;
  • Jong-Seob, Won (Mechanical and Automotive Engineering, Jeonju University) ;
  • Sung-Soo, Kang (Mechanical and Automotive Engineering, Jeonju University)
  • Received : 2022.04.18
  • Accepted : 2022.05.19
  • Published : 2022.12.20
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Abstract

The wireless power transfer (WPT) charging system for AGV depends highly on the coupling conditions due to air gap variation. To attain stable output power with high transfer efficiency under various coupling conditions, a single-stage, DC-DC converter that operates with robustness to changes in air gaps is proposed for the WPT system. The proposed converter is capable of soft switching under the set input voltage (Vin: 380 VDC), load conditions (0-1 kW), and air gap changes (30-70 mm). In addition, a wide output voltage range (Vo: 39-54 VDC) can be controlled by varying the link voltage due to the phase control at a fixed switching frequency. Experimental results are verified using a prototype of a 1 kW wireless power charging system.

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Acknowledgement

이 논문은 2022년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임 (20224000000220, 전북지역에너지클러스터인재양성) 2021년 과학기술정보통신부의 재원으로 한국연구재단의 지원을 받아 수행된 연구임. (AGV 무선전력 전송 충전 시스템 상용화 기반 기술 개발)

References

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