Analysis of Lightning Current Distribution for Reducing the Conductive EMI in a Structure

도전성 EMI 저감을 위한 구조체의 뇌격전류 분류율 분석

Lightning current distribution in a building directly hit was studied by using a scaled steel frame structure model. As the test current source, impulse current with the rise time of 10 ${\mu}s$ and sinusoidal current with the frequency of 30 kHz were used to confirm the validity of test results. The current distributions at both horizontal and vertical pillars were measured by using CT. From the test results, the reduction effect for the conductive EMI was verified and a design method reducing the conductive EMI was proposed.