Salvador12
Full Member level 4
Hello,
I was looking for some formulas but as I found out it is not so straight forward to find the appropriate ones.
So basically I was looking for formulas with which I can calculate the flux, field strength within an air gap for a ferrite core where I can input my parameters.
What I need is a core for broadband RF in which I can have a 1mm or 1.5mm air gap with enough flux. I also want to see how for a given winding turns count the impedance changes over frequency range and the field strength in the air gap.
I know the basics like reluctance = B field line length /permeability x core cross section, I could do the same for the airgap. But the rest kind of escaped me.
Like getting to flux in webers per sq metre and then converting that to Tesla.
What I am hoping for is to get a somewhat decent B field strength within my air gap , which for ferrites given their lower saturation limits would be in the range of 200 to 300 mili Tesla or 0.2-0.3T. I want to understand whether such a field strength is possible within a ferrite airgap of my size and over what frequency range, because I realize that a higher field would ask for more turns but more turns make a higher impedance so that limits the frequency.
Anyway , I hope you can help out,
thanks.
I was looking for some formulas but as I found out it is not so straight forward to find the appropriate ones.
So basically I was looking for formulas with which I can calculate the flux, field strength within an air gap for a ferrite core where I can input my parameters.
What I need is a core for broadband RF in which I can have a 1mm or 1.5mm air gap with enough flux. I also want to see how for a given winding turns count the impedance changes over frequency range and the field strength in the air gap.
I know the basics like reluctance = B field line length /permeability x core cross section, I could do the same for the airgap. But the rest kind of escaped me.
Like getting to flux in webers per sq metre and then converting that to Tesla.
What I am hoping for is to get a somewhat decent B field strength within my air gap , which for ferrites given their lower saturation limits would be in the range of 200 to 300 mili Tesla or 0.2-0.3T. I want to understand whether such a field strength is possible within a ferrite airgap of my size and over what frequency range, because I realize that a higher field would ask for more turns but more turns make a higher impedance so that limits the frequency.
Anyway , I hope you can help out,
thanks.