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Stator question | 4 comments (4 topical, editorial)

Re: Stator question (3.00 / 0) (#2)
by Lumberjack on Fri Mar 14th, 2008 at 07:39:52 PM MST
(User Info)

with side by side coils in only a single layer your a bit limited to the arrangements possible. Overlapping coils are a lot more flexible but require thinner coils.

Re: Stator question (3.00 / 0) (#3)
by FrancoisO on Sun Mar 16th, 2008 at 01:33:59 AM MST
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I have a similar question, I'm preparing to construct my first WT to beat the energy crisis that we have here in South Africa.
I managed to get hold of BIG Neo magnets 50 x 50 x 15mm N35( 2" x 2" x 3/4" ) and 12 " disk brake rotors.
I'm planning a 12' disk brake turbine(similar to this one: http://www.reuk.co.uk/DIY-2kW-Wind-Turbine.htm), but my problem is with the stator design.
The magnets I have are so big that I can only fit 8 of them on the rotors.
That would mean 6 coils for 3-phase power.
I need 24V, but which gauge wire, what size coil and how many turns do I use to maximise the massive flux of these magnets? I'd prefer low cut-in speed.
Very few of the turbines plans I have found on the net uses magnets of this size.
Any help, hints or links would be most welcome.

[ Parent ]

Re: Stator question (3.00 / 0) (#4)
by Flux on Sun Mar 16th, 2008 at 02:44:54 AM MST
(User Info)

Yes you will need 6 coils. Your magnets are going to be crowded on a 12" disc so you will not make best use of them but it should still be fine.

You will need to make the stator thicker than usual probably 20mm.

Because of the crowding I am not sure what winding space you will have ( I can't be bothered to draw it all out). Try a test coil with 100 turns. I suspect you may manage 1.2mm dia wire but you may have to go thinner if you can't get it in. You can make the holes in the coils trapezoidal so they are smaller than the magnet at the centre to get more wire in without loosing much.( 50mm outside by 35mm inside may be reasonable)

Flux

[ Parent ]

Stator question | 4 comments (4 topical, 0 editorial)

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