EMI analysis

[pav]

I was trying to do some EMI analysis on Comon mode chokes & inductors.
i got their transient response from which i also got their FFT. The
problem wat i am facing now is how do i interpret the results, how to
identify the fundamental harmonics & the distortion occuring & also
wat exactly does this fourier transform represent. I wanted to analyse
only the EMI FILters(cmc & inductors) whereas the circuit contains
other components like drivers etc, so how to confine only to the emi
filter .

 

[extremesoundandlight@yaho]

On Sep 11, 2:21 am, pav <praveenhun...@gmail.com> wrote:

I was trying to do some EMI analysis on Comon mode chokes & inductors.
i got their transient response from which i also got their FFT. The
problem wat i am facing now is how do i interpret the results, how to
identify the fundamental harmonics & the distortion occuring & also
wat exactly does this fourier transform represent. I wanted to analyse
only the EMI FILters(cmc & inductors) whereas the circuit contains
other components like drivers etc, so how to confine only to the emi
filter .

is it white noise or electromagnetic interferance your trying to
effectively suppress in this application.

 

[Eeyore]

pav wrote:

I was trying to do some EMI analysis on Comon mode chokes & inductors.
i got their transient response from which i also got their FFT. The
problem wat i am facing now is how do i interpret the results, how to
identify the fundamental harmonics & the distortion occuring & also
wat exactly does this fourier transform represent. I wanted to analyse
only the EMI FILters(cmc & inductors) whereas the circuit contains
other components like drivers etc, so how to confine only to the emi
filter .

EMI performance depends as much on component suitability and tracking
layout as Spice simulations.

Sounds to me like you need to learn the basics. Apologies if I've misread
you.

Graham