규소강판을 이용한 실드케이스의 차폐효과
- Abstract
- The shield effect of 4 layered shield case was investigated in this paper. The material of the case was non-oriented SiFe sheet with a thickness of 0.5mm. The size of the case was 100mm wide, 100mm high and 300mm long. Relative permeability of SiFe sheet was needed to calculate shield effect. It was obtained from the measurement by a ferrite yoke and from the calculation by eddy current FEM analysis.
Three configurations were used to connect both ends of SiFe sheet. First one is a connection by double-welded butt. Second one is to put the sheet the same material above the confronted both ends of the sheet to avoid a leakage magnetic flux. The last one is ideally without any connection. The shield effect of the second one agreed well with the last one and showed the shield effect of –40dB.
Key Words：Shield Case, Shielding Effect, SiFe Sheet, Ferrite-Yoke, Permeability
- Issued Date
- 2014
- Awarded Date
- 2014. 2
- Type
- Dissertation
- Publisher
- 부경대학교
- Affiliation
- 산업대학원
- Department
- 산업대학원 전기공학과
- Advisor
- 배종일
- Table Of Contents
- 목 차
ABSTRACT ………………………………………………………………… ii
1. 서 론 ………………………………………………………………………… 1
1.1 연구의 배경 ……………………………………………………………… 1
1.2 연구의 목적 ……………………………………………………………… 9
2. 본 론 ……………………………………………………………………… 10
2.1 실드케이스의 구조 …………………………………………………… 10
2.2 접합방식에 따른 전기적 측정 ……………………………………… 13
2.3 전기적 특성 계산 …………………………………………………… 19
2.4 비투자율 변화에 따른 인덕턴스와 저항변화 ……………………… 26
2.5 구조에 따른 차폐율 …… …………………………………………… 29
2.5.1 층수 따른 차폐율 ………………………………………………… 29
2.5.2 접합구조에 따른 차폐율 ………………………………………… 32
3. 결 론 ……………………………………………………………………… 34
REFERENCE …………………………………………………………… 36
- Degree
- Master
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