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Forum Index : Windmills : Using HDD motor as generator

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Photobug63
Newbie

Joined: 13/03/2010
Location: United States
Posts: 1

Posted: 04:36am 13 Mar 2010

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Sonny said You might want to take a look at this.
take a look at this

I went to the link and it didn't have the stats on the 2 full wave bridge rectifiers you need for the project.

Keith

neil0mac
Senior Member

Joined: 26/12/2009
Location: Australia
Posts: 210

Posted: 05:05am 13 Mar 2010

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Downwind said
For instance more blades should give more start up torque but will spin at a slower top end speed.

Has it ever been suggested that a second set of short(er) blades (equally spaced between thhe others) be used for start up torque - with weighted ends such that they fold in behind the 'speed' blades by cenrifugal force? And re-emerge when the wind speed drops?

(I know, it is a 'way out' idea! Or is it a way out of a known problem?)Edited by neil0mac 2010-03-14

Downwind

Guru

Joined: 09/09/2009
Location: Australia
Posts: 2333

Posted: 05:15am 13 Mar 2010

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Neil,

I dont know the answer but it sounds like a good mini mill test for you to let us know on the results.

I to have wondered about lets say 3 short blades between each of the 3 main blades to give starting torque but have no idea of the overall effect this will have on a mill and if it will cause drag at higher speed or not.

I would expect it to work but i realy dont know.

Pete.

Sometimes it just works

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