A large diameter ring style generator?

Please have you some idea from http://www.swayturbine.no/?page=219 to a very large diameter generator that is very light and could be flexible. The larger it is relatively to the whole system diameter the faster in linear speed it is, that may lead to a lighter generator per power unity.
For this small study, the generator (stator + rotor) is studied outside any other element. Thanks.

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Pierre: The extreme example was the failed Honeywell rooftop turbine that had the generator on the rim of the bicycle-spoke-type, typical professor crackpot, way-too-many-blades bicycle-wheel wind turbine. I think it;s GE and Siemens who have started limited use of large-diameter, direct-drive, permanent-magnet generators, but not that large. Maybe some use could be found in AWE for such an oversized version but there are also many other choices. You can tell the “SWAY” turbine is (was) going nowhere, with just a quick glance.

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Hi Doug, the Honeywell rooftop turbine is very heavy compared to its power. But the cause may be the implementation of some “way-too-many-blades bicycle-wheel”, and not the generator by itself.
A large-diameter, flexible, thin and light generator could lead to better AWE architectures.

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Ignore the construction method for a bit, you are imagining two very large rings on top of one another, one that has magnets and one that has copper windings? And then you want to spin one of the rings?

How many magnets and how many copper windings would you use? Would the magnets/copper cover all of their respective rings or only part of them?

Pierre: Sure, you can make a permanent magnet alternator at any diameter you want, for whatever use you want to put it. Sure a very-large-diameter version “might have” a use in AWE. “Might have” a use for other things too. But also at such a diameter, there are other possibilities. If we take the SWAY as an example, not seeing any indication it was a beneficial solution, in that case. But, good to point it out.

Yes for the two questions.

I don’t yet know, I would choose the lighter solution if it is reliable enough.

To @Windy_Skies and @dougselsam: an example of large-diameter and light generator is given by Dr. Beaujean http://quak-equipment-projects.com/Visualisation/images/RechargeNews2012.pdf. Unfortunately it is only a design, but its (even partial) realization would solve numerous problems that are meet in other AWE schemes.