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5 minutes know EMI propagation process of electromagnetic interference

Date: 2017-03-28
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 Electromagnetic interference is the most common problems in the process of electronic circuit design, designers have been searching for to eliminate or reduce the electromagnetic interference, or EMI method.But want to completely eliminate EMI interference, first need is to know what is EMI, what is its communication process, this article will for EMI propagation process in a general introduction.
EMI is generally referred to as the electromagnetic interference, but in fact the electromagnetic interference is divided into two kinds, one kind is to interfere with, the other is a radiated interference.Conducted interference is mainly electronic equipment to produce interference signal is transmitted through a wire or public power cord, interfere with each other.Further subdivided, conducted interference and common mode interference and the differential-mode interference.

 

5 minutes know EMI propagation process of electromagnetic interference

 

EMI propagation process
EMI propagation process is mainly through three parts, the interference sources, interference channels, receiver.Interference sources interference can be found as equipment, through the transmission way.For power supply, generally only from two directions, or reduce the interference sources, either to cut off the interference channels

 

5 minutes know EMI propagation process of electromagnetic interference

 

  Want to quickly understand the spread of EMI, want from figure 2 of these different waveform of high order harmonic analysis, as shown in figure 2, the first several different waveforms of FFT, observe its higher harmonic distribution.Through image can clear understanding of this problem.
This article introduce the graphic combination of electromagnetic interference EMI propagation process, you can see the spread of electromagnetic interference process isn't easy, but it is not complicated.Only after understanding the principle of EMI and effective to avoid the EMI suppression, hope everyone after read this article to be able to have further understanding of EMI.

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