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Joblow Regular Member Joined: 05/01/2010 Location: AustraliaPosts: 54
Posted: 02:11pm 22 Oct 2010
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Your thoughts on this idea would be apreciated.
Would this work? Would the mill pull the stator coils closer to the rotor as the speed increased? Would cogging be reduced? Would there be any benefits at all? or is there nothing to be gained?
The opinion of great brains of this forum would be appreciated. The man who never made a mistake never made anything
Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333
Posted: 03:38pm 22 Oct 2010
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For 1) it would be only an advantage to a iron core machine.
2) there is better ways to overcome cogging i would think
3) if the magnets relied on centrifugal force than it would work against itself.
4) to go to the trouble to build a mill with this system, it would be far cheaper and more practical to build a AXFX mill and not encounter the problems you are trying to solve with this system.
5) its just one more thing to fail?
Thats just my 2p worth.
Pete.Sometimes it just works
MacGyver Guru Joined: 12/05/2009 Location: United StatesPosts: 1329
Posted: 02:03am 23 Oct 2010
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Joblow
John, Pete's right; concentrate on building an axial-flux rig.
I'm a bit of a maverick when it comes to following the leader, but after several failed attempts to build a wind generator "better than the one everyone else is building" I've come to the conclusion that the axial-flux is already the best around. I think it might just be as good as it gets in this lifetime.
If you can wait until March of 2011, I'll be tossing up a "quick-'n-dirty' axial-flux build which needs no more tooling than a band saw, hand drill (or mini drill press), some sheet plastic, magnets, polyester resin, 12-gauge sheet metal, enameled copper wire and a bicycle hub to make it work. Oh, yeah and a welder; I'm outsourcing that part, so I sort of forgot. I'm without my "shop" until next year, so I've been doing as much "off-the-shelf" building as I can. It should turn out to be an easy project for a newbie as well as an old fart like me.
I should tell you from the get-go: I build small turbines, etc. I'm shooting for nothing more than 300 to 500 watts as I have a moderate (but steady) ocean breeze, but am limited to turbine size (neighbors). That doesn't mean you have to follow suit, just size things up and go for it.
When March rolls around, I"ll post a full show-'n-tell build on the 4m.
. . . . . MacNothing difficult is ever easy!
Perhaps better stated in the words of Morgan Freeman,
"Where there is no struggle, there is no progress!"
Copeville, Texas
Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904
Posted: 09:49am 23 Oct 2010
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Mac, while everybody emphasizes the "axial" flux thing, what basically makes these machines so successful is the ironless design of them.
There is no reason on could not use a 'radial' flux ironless design. Sure, the stator would be a little more complex to make but that could be overcome. The magnet mounting would, IMO, be actually simpler and more efficient.
I'm mentally working on such a design at the moment (must keep that grey matter up there busy ),
lets see if you can figure out what I'm talking about.Klaus
Joblow Regular Member Joined: 05/01/2010 Location: AustraliaPosts: 54
Posted: 11:35am 25 Oct 2010
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Thanks for your imput guys. I'm a bit of a maverick myself as far as dreaming up new and complicated things which either don't work or has already been done. I guess it will just have to be an axial flux but I'm greedy and want to get the most out of the wind I have (excuse me while I fart... ...... that's better) The man who never made a mistake never made anything
Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333
Posted: 12:16pm 25 Oct 2010
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A little twist of words here.
[quote]The man who never made a mistake never made anything, but I'm greedy and want to get the most wind out, excuse me while I fart... ......[/quote]
Now that sounds like a sticky mess, and a new set of underpants
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
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),
...... that's better) 