The basic formula for a toroidal inductor is: Well as resistance and reactance versus frequency. csv file for a particular mix and, given the ferriteĬore's dimensions, calculate and then plot impedance as magnitude and phase as To tie it all together I wrote a MATLAB script to read the In other words, everything I needed was there. Permeability" data, versus frequency, for various ferrite mixes. the paper's equation 9 and the definition of L 0 at the back of the paper). To express the equation for inductance given a ferrite toroidal inductor (e.g. This paper has all of the information required Of resources, such as a paper titled " Specifying a Ferrite for EMI Suppression," by Carole U. (In this example, the core is a Mix 31 FT-240 core.) Impedance ought to be, given the toroid core geometry and the ferrite For comparison purposes, I thought it would be useful to calculate what the
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