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Newbie plans 10' with custom stator hopes 4 700w | 17 comments (17 topical, editorial)
Re: Newbie plans 10' with (3.00 / 0) (#9)
by wpowokal on Wed Jul 16th, 2008 at 08:04:03 AM MST
(User Info)

I can not understand your winding details but the subject says 10' and 4700W, What wind speed do you have to get that wattage from a 10' turbine?

I'm always interested in people who can think outside the box so look forward to an explination of your winding method.

allan down under
A life lived in fear is a life half lived.



Re: Newbie plans 10' with (3.00 / 0) (#10)
by MAXial dreamer (ihearbs@yahoo.com) on Wed Jul 16th, 2008 at 08:40:41 AM MST
(User Info)

Oh meant hopes (4)for 700w but 800w would be nice;)
As far as my winding technique I have a couple ideas in mind.  I will let you guys know what I settle on.  Its challenging for a multitude of reasons.  
"windpower" at least its not crack!
[ Parent ]


Re: Newbie plans 10' with (3.00 / 0) (#12)
by TomW on Wed Jul 16th, 2008 at 08:59:49 AM MST
(User Info)

MAX;


Oh meant hopes (4)for 700w but 800w would be nice;)

A perfect example of why we discourage the use of "texting" shorthand type posts. Taking the time to type that one out would have saved you the time to type the clarification, for example. Plus, a lot of these guys are old farts [I know Allan is!] who don't use those devices so don't know the "code"

Proper spelling and grammar go a long way towards clear communication.

Just a bit of advice to help make your time here more profitable mining information.

Tom

"Education consists mainly of what we have unlearned."--Mark Twain
[ Parent ]



Re: Newbie plans 10' with (3.00 / 0) (#13)
by Flux on Wed Jul 16th, 2008 at 09:07:24 AM MST
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I also thought it was 4700W, this modern language is difficult to follow.

Yes I am sure you can do it as a Torus in about 4 forms, some with teeth and some without. It will be hard work and at best you may save 30% on magnets but those little tiny cubes are not going to make life very easy. Pull in Lbs is meaningless so that doesn't give us much of a clue.

Using a Torus you shouldn't be using the common 12/9 dual rotor as a guide, that is not the way to do it. There is nothing magic about the 12 0r 13" disc diameter either so I wouldn't limit yourself by that.

I think a well designed torus should work quite well, but the actual performance will be no different from simpler constructions and unless you do something with the matching of the load the efficiency will be the same.

Don't thank any of us for help, nothing posted here is going to be much help to you and you will have to start from scratch rather than try to adapt windings for a different type of machine.

Good luck and keep us posted.

Flux

[ Parent ]



Re: Newbie plans 10' with (3.00 / 0) (#14)
by MAXial dreamer (ihearbs@yahoo.com) on Wed Jul 16th, 2008 at 06:39:26 PM MST
(User Info)

the 1/2in cubes are Grade N45, Brmax: 13200
At this point I am trying to figure what wire size to go with and how much I need to buy.  Once I've built the altenator and tested it out, I'm open to adjusting my wingspan diameter accordinglly.  But the last think I want to do is fudge it and burn up my stator!
"windpower" at least its not crack!
[ Parent ]


Re: Newbie plans 10' with (3.00 / 0) (#15)
by Flux on Thu Jul 17th, 2008 at 01:25:20 AM MST
(User Info)

I can't easily check any figures for a torus but with 32 of those cube magnets per disc ( 64 total) you are way below what is needed for a 10ft rotor using an ironless machine.

Even with the torus I don't think you will be even near to handling a 10ft prop.

You can't settle a winding without deciding a speed so you have a chicken and egg situation. If you build the alternator for 10ft and miss then it will be too slow to fit smaller blades.

I am inclined to think you would probably match an 8ft machine reasonably well.

The core will cost you much more than sensible magnets but it will be interesting.

Flux

[ Parent ]



Re: Newbie plans 10' with (3.00 / 0) (#17)
by MAXial dreamer (ihearbs@yahoo.com) on Wed Aug 6th, 2008 at 11:04:21 AM MST
(User Info)

I see the 10' turbine uses 12 n40 2"x1x.5 magnets that would 72 1/2in cubes per rotor.  For now it looks like I'll be using 48 n45 cubes per rotor.  looks hard to tell what dia blades this machine will handle.
"windpower" at least its not crack!
[ Parent ]


Newbie plans 10' with custom stator hopes 4 700w | 17 comments (17 topical, 0 editorial)

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