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Radiated Emission of Electrical Fast Transient/Burst Signal and Its Countermeasures

전기적으로 빠른 과도현상/버스트 신호의 복사방출과 대책

Park, Soo Hoon;Kim, Dong Il;Park, Youn Joon;Nah, Seung Wook
박수훈;김동일;박연준;나승욱

  • Received : 2015.12.18
  • Accepted : 2016.02.25
  • Published : 2016.03.31

Abstract

In this paper, we studied about the radiated emission of EFT(Electrical Fast Transient)/Burst signal, referenced IEC-61000-4-4 of the international EMC standard and its effect on EUT(Equipment Under the Test) when EFT/Burst signal (Conducted noise) induced on a power cable to EUT. Firstly, we set up test sample by the standard and +4 kV standard signal is induced by EFT/Burst signal generator with 1 m length power cable for 1 minute. Consequently, we found not only induced EFT/Burst signal along power line, but also directly radiated emission signal from EFT/Burst signal generator (Radiated emission noise of EFT/Burst). The radiated emission signal of EFT/Burst was 30 dB which is higher than limit of CISPR 22 which is international EMC standard. Moreover, we measured the electric field strength by changing distance from maximum radiated emission point to electric field strength tester. As a result, this electric field strength was 23 V/m which is higher than international EMC standard test level(CISPR 24). Therefore, it was confirmed that the probability of malfunction may be high when radiated emission of EFT/Burst noise exists near the EUT.

Keywords

Electrical Fast Transient/Burst Signal;Radiated Signal;Electric Field Strength;Malfunction

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Acknowledgement

Supported by : 한국기술연구소(주)