Hi sir, Good nice explanation.i have one doubt why we use common mode choke instead of two inductors in line. And if we calculate the RMS current shall we choose choke through mouser or any other distrubutors and what if exact value not get
Hey, Thanks for asking very good question. Common mode choke filters suppress common mode noise and and at some extent differential mode noise as well. So many people common mode choke in their design. But it does not means differential mode inductor have no use. If you power rating more than 100W, you might need to have both in design. Even dual stage filtering needed. In some cases less than 10W you may not need common mode choke as well , single indicator along with C will do the job. So filter requirement depends on your application. Inductance value is very important if chose the choke. If you know inductance vale and current you are free to choose from mouser. In case if do not get exact value , you look for higher inductance and current rating but not lower value. Like if your calculated capacitance value is 18uf , you always choose 22uf etc. Hope this will clarify your doubts. Thanks !
Hi...jyothi...If i remember correctly...i found this in some application notes in internet but do not have handy with me. The formula's used here are correct.
I am designing a Common mode choke for inverter, wherein there are multiple switching frequency e.g. SMPS Fsw = 120kHz, Inverter section Fsw=4kHz, pls suggest. what should be the Fsw for calculating Fc-cutoff.
Hi sir,
Good nice explanation.i have one doubt why we use common mode choke instead of two inductors in line.
And if we calculate the RMS current shall we choose choke through mouser or any other distrubutors and what if exact value not get
Hey, Thanks for asking very good question.
Common mode choke filters suppress common mode noise and and at some extent differential mode noise as well. So many people common mode choke in their design. But it does not means differential mode inductor have no use. If you power rating more than 100W, you might need to have both in design. Even dual stage filtering needed.
In some cases less than 10W you may not need common mode choke as well , single indicator along with C will do the job. So filter requirement depends on your application.
Inductance value is very important if chose the choke. If you know inductance vale and current you are free to choose from mouser.
In case if do not get exact value , you look for higher inductance and current rating but not lower value.
Like if your calculated capacitance value is 18uf , you always choose 22uf etc.
Hope this will clarify your doubts.
Thanks !
How do you choose the Y and X2 capacitor value for the common mode filtee
Amazing as usual
Thanks..keep learning.
thanks you much,please do video on y capaitor , x capaitor and differential mode indutor.
Hey, thanks for your question.
Sure I will make.
Hi sir,
can you please explain how you got the formula for finding the inductance of a common mode choke.
Hi...jyothi...If i remember correctly...i found this in some application notes in internet but do not have handy with me. The formula's used here are correct.
i am also curious about the formula
@@XufengQIN Let me find it, you can message me in whatsApp. Checkout the the home page.
@@ElectronicsCircuitHubECH
It's an application note from coilcraft.
@@TB-jl9fr Hi...can you attach the link ?
How did you get attenuation of -30db and what is attenuation kindly explain in detail thanks
I am designing a Common mode choke for inverter, wherein there are multiple switching frequency e.g. SMPS Fsw = 120kHz, Inverter section Fsw=4kHz, pls suggest. what should be the Fsw for calculating Fc-cutoff.
and also one more doubt, as my input is three phase, i have to take L/phase and use such 3 windings right?
Did I calculate wrongly and why did it give such a result?
Bhai jin logo ko answer ni dena h unke comments like kyu kar raha. Ya toh answer de ya fir fir like bhi mat kar...
65 * 10^(30/40) = 365. bla bla ?
It's the damping value in decibel as stated in the formula Attenuation (-dB)