Soft ferrite's permeability in high frequency

[pepekong]

Hello,
I'm new here, I was looking for some help in my project. I'm interested in modeling the permeability for soft ferrites until 30Mhz (MnZn). I'm using a toroid with 15 spires, current 1A AC (it'll be constant) and variable frequency (40Hz-30MHz). So, could you help to understand which are the parameters or characteristics that I have to consider in soft ferrites to model them?
I'll be so greatful too if you give me some literature to read.
Thanks

 

[MrAl]

Hi there,


If you cant find anything else you can take a look on the Magnetics Inc. site. They have (or at least had) a lot of literature on magnetic materials that you
can read over and see if you can find what you need.

 

[RCinFLA]

Usually powered iron is used for higher frequency. Ferrites generally have higher permeability. Mn-Zn generally for less then 1 MHz. Another good source for parts and info is:

Products : CWS ByteMark, largest supplier of toroids, ferrite cores, iron powder cores, MPP cores and RF cores

 

[Hero999]

Why not use an air/plastic cored coil?

I would've thought the magnetic losses will be greater than the higher ESR an air coil will have.