Development of EMC filter for electronic equipments mounted on ships

Kim, Dong-Il; Kim, Eun-Mi; Jeon, Mi-Hwa

Journal of Navigation and Port Research 2010;34(1):33-37.
Published online February 28, 2010.

선박 탑재 전자기기용 EMC 필터 개발

김동일, 김은미, 전미화

Development of EMC filter for electronic equipments mounted on ships

Dong-Il Kim, Eun-Mi Kim, Mi-Hwa Jeon

Abstract

It is very important to prevent the electromagnetic interference and to prevent malfunction of electronic equipments mounted on ships. To solve these problems, in this paper, the EMC filter was designed, fabricated, and tested The Ni-Zn ferrite beads with high permeability were used to make large inductance as the inductor and the feed-through capacitors without any resonance points. As a result, excellent attenuation characteristics of 25 ~ 70 dB were obtained from the 0 kHz ~ 1.5 GHz band In addition, when the Electric Fast Transient (EFT) of 4 kV in the level 4 of IEC 61000-4-4 was induced the EFT reduced to 600 V. Therefore， it was clearly shown that the developed EMC felter can be used for suppressing the electromagnetic interference on-board electronic devices and equipments.

Key Words: EMC 필터; EMI;EMS;EMC filter;transmission coefficient;ferrite beads;feed-through capacitors