The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Characteristic Analysis of Induction Phenomena in the Nearby Mesh Structure Conductive Part of Large Capacity Wireless Power Transmission System

대용량 무선전력전송 환경 인근 메쉬구조 도전부 유도현상 특성 분석

  • Chae, Dong-Ju (Electrical Safety Research Institute, Korea Electrical Safety Corporation) ;
  • Yi, Geon-Ho (Electrical Safety Research Institute, Korea Electrical Safety Corporation) ;
  • Lim, Hyun-Sung (Electrical Safety Research Institute, Korea Electrical Safety Corporation) ;
  • Cho, Sung-Koo (Electrical Safety Research Institute, Korea Electrical Safety Corporation)
  • Received : 2018.10.29
  • Accepted : 2018.12.05
  • Published : 2019.01.01
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Abstract

A large-capacity wireless power system is a technology that transmits electric power of kW or more in a noncontact type. Electric cars, electric buses, and electric railways. In order to increase the power transmission efficiency, a resonance method using a frequency of kHz is applied and the efficiency is 80 ~ 90%. In this case, the loss is 10 ~ 20% other than efficiency, and corresponds to several hundreds of W to several kW in kW class wireless power transmission. 35 kW wireless feed system environment, and induced current in the nearby conductive part was measured. As a result of analysis, it was confirmed that induction phenomenon is higher as the loop configuration of the conductive part per area is dense. The increase of the induced current in the mesh loop is characterized by the density of the nearby conductive part having a permeability per unit area. The concentration of the magnetic field by the permeability is increased and the induction phenomenon causing the induction current is increased. It was confirmed that induction phenomenon increases by about 2.7 times when 9 times dense structure is formed.

Keywords

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그림 1 무선전력전송 시스템 모식도 Fig. 1 Schematic for wireless power transfer system

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그림 2 무선전력전송 환경 효율과 손실에 대한 모식도 Fig. 2 Schematic for efficiency and loss of wireless power transfer environment

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그림 3 다양한 메쉬구조 형상 (1 × 1, 2 × 2, 3 × 3 타입의 메쉬구조) Fig. 3 Various type of mesh structure (1 × 1, 2 × 2, 3 × 3 type)

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그림 4 거리에 따른 유도전압 차이 확인 Fig. 4 Examination of induced voltage difference by distance

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그림 5 1 × 1 구조 모의를 위한 회로와 결과 값 Fig. 5 Circuits and results for 1 × 1 structure simulation

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그림 6 2 × 2 구조 모의를 위한 회로와 결과 값 Fig. 6 Circuits and results for 2 × 2 structure simulation

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그림 7 3 × 3 구조 모의를 위한 회로와 결과 값 Fig. 7 Circuits and results for 3 × 3 structure simulation

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그림 8 1 × 1 구조 실증실험을 위한 실험 모식도 Fig. 8 Schematic for 1 × 1 structural demonstration experiment

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그림 9 1 × 1 구조 실증실험 결과 Fig. 9 Result for 2 × 2 structural demonstration experiment

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그림 10 2 × 2 구조 실증실험을 위한 실험 모식도 Fig. 10 Schematic for 2 × 2 structural demonstration experiment

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그림 11 2 × 2 구조 실증실험 결과 Fig. 11 Result for 2 × 2 sturctural demonstration experiment

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그림 12 3 × 3 구조 실증실험을 위한 실험 모식도 Fig. 12 Schematic for 3 × 3 structural demonstration experiment

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그림 13 3 × 3 구조 실증실험 결과 Fig. 13 Result for 2 × 2 structural demonstration experiment

표 1 메쉬구조에 따른 전기적 특성 분석 (시뮬레이션) Table 1 Analysis of electrical characteristics according to mesh structure (simulation)

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표 2 메쉬구조에 따른 전기적 특성 분석 (실증실험) Table 2 Analysis of electrical characteristics according to nesh structure (demonstration experiment)

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