Originally posted by marathonman
From those numbers I see that the impedance of each set of electromagnet alone is 20 ohms (100volt/5 A) and adding the maximun impedance of the toroid+electromagnets is 40 ohms, which gives a impedance to the toroid of 20 ohms. Considering a low resistance system we can approximate that those are aprox. the inductive reactance of your part G, XL = 2•pi•f•L, then for 60 Hz your part G maximun inductance is 53 mH in each half turn. Just to have a reference.
I have seen some online calculators to get the inductance of a toroid as function of its dimensions and number of turns. I do not know if those may be applied to a system with two opposite taps and two opposite fields.
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