minimum magnet rotor thickness

[kitestrings]

Greetings,

We're using a recycled, readily available and pretty well proven (Enertech 4 kW) hub plate and taper lock hub assy.  Ours is a 15' axial; 16-pole.  The front rotor will have the magnets on one side (downwind) of the hub and the blades on the opposite.

So my question is, if the second rotor plate has no other contributing forces other than the magnets is there a mnimum thickness that is limited by the flux path, or other considerations?

Thanks for nay thoughts on this,

~kitestrings

[Flux]

I think you will be limited mechanically more than worrying about flux. Probably 1/4" thick will get you most of the flux but I question the mechanical stability with 16 strong magnets pulling it even if there is no other mechanical load on it. I think you need to seriously think about something nearer 1/2" just for the magnetic pull but it is overkill from the flux point of view.

Flux