I would like to induce a current of about 1ampere around a loop whose impedance can vary from say 1mOhm to say 4 Ohms by using a CT and driving it's secondary.
Now, transformers are not my strong point.
I'm suspecting that my idea is severely flawed due to the lack of sufficient magnitising flux to achieve this end. Please put me out of my misery quickly if this is the case.
So if I use a 100/5 CT (20:1 ratio) then I'd need to drive a 50mA current in the secondary to cause my 1A in the primary. My 4 Ohm resistance would then appear as 4*20^2 ohms to the secondary =1.6kOhms resulting in 1600*0.05=80V driving voltage. Question 1) am I correct so far? Question 2) how do I make sure that it saturates at 4Ohms so that if Rprimary reduces to say 100mOhms, I still only want to have about 1A in the primary?