Dual Stator Wind Turbine

[CamMan595]

I searched the forum for this question and did not find it so I apologize if it has been asked before.  I am wondering if you can put two stators on a wind turbine?  And would it have any benefit?  I don't have an electronics background so this may be an obviously bad idea.  I just don't know.  I am picturing a "Magnet -Stator-Magnet -Stator-Magnet" sandwich.  Would the power generated go up?  Would it take more wind to start spinning?

Thanks.

[wdyasq]

Has been discussed 'many times'. You are better off with a larger 'single dual rotor'.

On your searches try google with a search restriction to fieldlines such as

 "XXX site:fieldlines.com" where XXX is the search and fieldlines is the domain restriction you desire.

Ron

'

[finnsawyer]

This was just discussed recently.  I guess you'll have to do a different kind of search.  In general, it's not a good idea, as doubling the stator width by going to two stators also cuts the induced voltage per stator in half by doubling the width of the air gaps and cutting the magnetic flux in half, all other things being the same.  In other words you doubled the amount of copper to get the same voltage if the two stator outputs are connected in series.  Twice the copper means twice the resistance also in that configuration, which means less current into the load.  

[CamMan595]

Thanks for the Google search tip.  That is very useful.

[partsman]

I don't see how he would be doubling the air gap.

if he has two stators and three rotors.

"magnet stator magnet stator magnet"

Seems like you would be able to get the power of

two duel rotor machines with three rotors. (less magnet cost)

Also you would be using smaller magnets than one big stator.(cheaper magnets)

Would be a real pain to build though.(more time and materials)

Simple is usualy best.

[finnsawyer]

I did state with all other things being the same, although it can't be absolutely the same.  You need to be a little flexible in your thinking.  He would have the same grade, diameter (or equivalent), and net thickness of magnets.  So, he goes from three magnets 1/4 inch thick to two magnets 3/8 inch thick across the rotors.  His magnet cost would be about the same and he would actually get more voltage and power out with the single stator.      

[Lumberjack]

For a larger machine there are a few possible benefits such as better heat distribution and improved control at the cost of some added complexities. Stick to a single untill you have reached the limit of what you can get out of it.