I have built a rotational Eddy brake in a small car, where I use gears to make the metal disc in the brake rotate faster or slower at will. I know that the braking torque is dependant on the rate of change of the magnetic flux linkage and therefore the faster the disc spins the stronger the brake force.
But I am unable to calculate the braking torque. I can't find a formula that joins the Rotational speed of the disc with the torque produced. I think I would first need a relation between rotational speed and magnitude of the eddy current produced. An then work with that to calculate magnetic drag. From which to obtain braking torque
I am currently lost. I think I have over researched and am unable to find something useful.