About Variac Transformer.

I have mostly seen the Variac Transformers with Ferrite core. Just want to know if I wind it on an iron core, would it work? And now frankly, I have in my mind that if I wind it on a Stator of a Padistel fan (Round Core), Would it work? I want to use it just for the calibration of Stabilizers. I just want to increase and decrease the voltages manually. I'm handy to make the sliding mechanism. Looking for openions. Thanks and regards.

 

Post a picture of the core you are thinking of using. What is the maximum current you need? An iron core will likely have more losses due to eddy currents unless designed carefully.

Regards,
Ifixit

 

I once made one with 2 in wide steel strapping tape; 2 in id, 3.5 od, wound with ?? # 16 enameled wire, painted with glyptal ?. 60 Hz, about 3A. Of course you are using an isolation transformer ahead of " Variac" for isolation from line to meet AAC requirements.