Time domain analysis of common-mode EMI noise in the power lines at electronics production plants

The paper presents an analysis about the problems caused mostly by common-mode EMI noise in up-to-date production plants applying large number of sensitive electronic and microelectronic equipment and large power systems incorporating power electronic equipment, generating both radiated and conducted EMI noise in a wide frequency range. The paper focuses mainly on problems caused by common mode conducted EMI noise. It presents models for computer simulation of the system, suggests practical solutions for the reduction of the noise levels and finally simulation and on-site test results are included in the paper.