[lonerepubinma]

How do they clutch in down in extreme winds ?

[spokeshave]

But...but...using a MAGNETIC levitation device affects the gravity flux causing cosmic warming and resulting increase in black hole collapse so we are all going to die.

[VOA]

How do they clutch in down in extreme winds ?

Good question.
My NON-engineer guess would be:
Maybe either move the levitating magnets, or interfere with them via
external magnets?

But this sort of thing is better left to better minds than mine!
Like that of my smarter, younger, electrical engineer cousin
(and PE, "professional engineer", that is humble enough to not
remind of his estimable abilities as an engineer, Thank G-d!)

[BlazingArizona]

How do they clutch in down in extreme winds ?

If the blade angle were made variable, they could 'close' the drum. This would be easier than feathering a conventional turbine.

[Damifino]

How do they clutch in down in extreme winds?

Just a stab in the dark - They would not have to mechanically limit the drum (other than for physical limits of the structure). It would be possible to regulate the power output by adjusting the gap spacing on the generators. This would in effect make the generator less efficient. I'm not sure it's a practical solution however.

Energy storage from periods of excess generation is key. Batteries and Capacitors have environmental issues. Maybe they could use the excess electricity to pump water into massive resivoirs. Fill them when there is good wind hydro-power when there isn't.