How to overcome "Magnetic Flux" resistance?

How to overcome "Magnetic Flux" resistance?

I’m building a very Basic MEG “Motionless Electric Generator” Basically I’m using a O’ Core Toroidal transformer core, cut it in half and them insert very large neodymium magnets on the top and bottom gap! now every time that I put any kind of winding to alternate the magnetic flux it is generating resistance and over heating! I know perfectly how to calculate the winding on the magnetic coils! but no matter what and how well I calculate the coils! any help will be greatly appreciate! even if you send me to a forum were they discus it!