No, you simply measure the current drain into the coil and when it hits a value that you associate with a magnetic short-circuit you limit the current to something very low until the short-circuit goes away. That way nothing gets hot.

http://pics.camarades.com/v/jacques/renewables/windmill/dscf...

See those laminates at the edges? They're 'open' for that same reason, that way the magnetic field goes through the coils rather than that it heats up the steel and generates waste heat.

(that's from a windmill I built, diameter is ~ 12").