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http://dx.doi.org/10.5515/KJKIEES.2017.28.1.61

Improvement of Electromagnetic Shielding Structure for Reduction of the Leakage Magnetic Field in WPT System  

Kim, Jongchan (Department of Information & Communication Engineering, Chungbuk National University)
Lee, Seungwoo (Department of Information & Communication Engineering, Chungbuk National University)
Kang, Byeong-Nam (Department of Information & Communication Engineering, Chungbuk National University)
Hong, Ic-Pyo (Department of Information & Communication Engineering, Kongju National University)
Cho, In-Kui (Radio Technology Research Department, ETRI)
Kim, Nam (Department of Information & Communication Engineering, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.1, 2017 , pp. 61-68 More about this Journal
Abstract
In this paper, we propose an improved magnetic field shielding structure to reducing the magnetic field generated in the wireless power transfer system operating at a low frequency band. The proposed structure consists of the magnetic material and the conductive material, magnetic field cancelling effect for power transfer is minimized while improving the leakage magnetic field cancelling effect by optimizing the various design parameters in the proposed structure. We analyzed and verified the efficiency of the wireless power transfer system and the reduction effect of the leakage magnetic field through computer simulation and measurement. Analysis results show that power transfer efficiency of the wireless power transfer system utilizing the proposed structure is 77 %, which is maintained at the conventional power transfer efficiency. In addition, compared with the structure maintaining high power transfer efficiency, leakage magnetic field strength is reduced to 29~37 % at the nearest point.
Keywords
Wireless Power Transfer(WPT); Magnetic Field Shielding; Shielding Structure;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 정상훈, 안혜린, 김용준, 서준교, "자기유도방식의 WPT을 위한 최적 코일 구조", 한국정밀공학회 학술발표대회 논문집, pp. 325-326, 2011년 10월.
2 Yoshiki Yasima, Hideki Omari, Yoshimitsu Morizane, Noriyuki Kimura, and Mutsuo Nakaoka, "Leakage magnetic field reduction from wireless power transfer system embedding new eddy current-based shielding method", Electrical Drives and Power Electronics(EDPE), pp. 241-245, 2015.
3 Seungyoung Ahn, Chulsoon Hwang, and Hyun Ho Park, "Optimized shield design for reduction of EMF from wireless power transfer systems", IEICE Electronics Express, vol. 11, no. 2, pp. 20130930, 2014.   DOI
4 박종민, 남상욱, "무선 전력 전송에 관한 기본적인 고찰", 한국전자파학회논문지, 25(10), pp. 959-965, 2014년 10월.   DOI
5 박영진, "WPT의 이해", 전기공학회지, pp. 32-38, 2012 년 8월.
6 윤제훈, "미래에 대응하기 위한 국내 무선전력전송 산업방향 정책제언", 한국전자파학회논문지, pp. 699-709, 2015년 8월.
7 Hongseok Kim, Chiuk Song, Jonghoon Kim, Jiseong Kim, and Jungho Kim, "Shielded coil structure suppressing leakage magnetic field from 100 W-class wireless power transfer system with higher efficiency", Microwave Workshop Series on Innovative Wireless Power Transmission, Technologies, Systems, and Applications (IMWS), pp. 83-86, 2012.
8 Jonghoon Kim, Hongseok Kim, In-Myoung Kim, Young-Il Kim, Seungyoung Ahn, Jiseong Kim, and Joungho Kim, "Reduction of electromagnetic field from wireless power transfer using a series-parallel resonance circuit topology", Journal of Electromagnetic Engineering and Science, vol. 11, no. 3, pp. 166-173, Sep. 2011.   DOI
9 배석, 최돈철, 현순영, 이상원, "휴대단말기 무선전력 전송모듈용 전자기파 차폐소재", 한국자기학회지, 23(2), pp. 68-76, 2013년 4월.   DOI
10 T. Batra, E. Schaltz, and S. Ahn, "Effect of ferrite addition above the base ferrite on the coupling factor of wireless power transfer for vehicle application", Journal of Applied Physics, vol. 117, 17D517, 2015.   DOI
11 이승환, 김현민, 김희제, 김수원, "자기유도방식과 LC 공진을 이용한 WPT기기", 전기학회논문지, 62(3), pp. 349-354, 2013년 3월.   DOI