It's my experience that most of the heat is developed in the stator, not the rotor. I have not thrown a superglued magnet, as they are encased in resin after...
1811
Mike Burgess
mike_burgess
Oct 1, 2008 10:59 pm
... application? ... These are likely both pricey, but what's that compared to having to rebuild ?? Masterbond EP17 is good to 600F. ...
1812
Dan Fink
danbob88
Oct 1, 2008 11:46 pm
We use thin viscosity superglue to tack the magnets down, then cast vinyl ester resin around them. The superglue justs holds them in place for casting. We...
1813
ke5fdh
Oct 3, 2008 1:40 pm
I've been trying to understand furling. I haven't been able to determine what actually is meant by 'tail weight' or 'tail tip weight'. Is it the actual...
1814
Dan Fink
danbob88
Oct 6, 2008 5:34 am
It's all calculus, since the weight near the end of the tail affects furling more than the weight of the tail near the tower. What calculations did you...
1815
johnpsherman
Oct 6, 2008 4:38 pm
Everything I have seen on the performance of various axialflux generators has been after-the-fact observations. Is there any kind of "cookbook"; for designing...
1816
Steve Spence
sspence65
Oct 6, 2008 4:44 pm
Hugh Piggott's book, plus the articles the Dan's wrote for back home magazine give the cookbook approach. Anything else is experimentation. Steve Spence ...
1817
Mike Burgess
mike_burgess
Oct 6, 2008 5:15 pm
... be aware of local/state regulations regarding steam pressure. Because inherent explosive nature of a boiler, they have been outlawed or severely regulated...
1818
Steve Spence
sspence65
Oct 6, 2008 5:17 pm
I go to a lot of live steam events, so it's doable. Steve Spence http://www.green-trust.org...
1819
Dan Fink
danbob88
Oct 6, 2008 6:39 pm
Hi John -- it's a bit of a black art. Our upcoming book "Homebrew Wind Power" does cover it some detail, it's too long to reproduce here. You'll want to know...
1820
Samuel
samuelchrist
Oct 7, 2008 2:16 am
It is possible to get some 230v if u increase the winding and the wire size, or would that be too heavy ? As to me it seem logical if u increase the wire size...
1821
Steve Spence
sspence65
Oct 7, 2008 2:23 am
Wild ac has varying voltage and frequency, so it's only useful for battery charging. There would be no point in winding the coils for 230v unless you have a...
1822
jt
thegreentrader
Oct 7, 2008 1:09 pm
Hi all, Quick into and then onto issues. I'm new to the group and have been lerking for a little. I'm also new to the world of wind power generation. I've...
1823
hoverindia
Oct 9, 2008 11:58 am
Hi everyone, I am new to the group. I have just completed a 10 ft turbine with info available on www.otherpower.com. It works! But I made one mistake which is...
1824
Steve Spence
sspence65
Oct 9, 2008 12:03 pm
What did you use for a plate? I've never had a problem with warped rotors. Steve Spence http://www.green-trust.org...
1825
Dan Bartmann
buckvillian
Oct 9, 2008 4:56 pm
Howdy - The two important factors.... you should have a cutin speed of 140 rpm (150 is OK but getting a bit fast) - so, hook it to a 3 phase rectifier and look...
1826
Dan Fink
danbob88
Oct 9, 2008 4:59 pm
Hi Vivek -- we see this problem occasionally too, since we are building so many turbines. We get our steel parts water-jet cut out of 4x8 ft sheets of steel,...
1827
jimyjak1
Oct 9, 2008 8:33 pm
Vivek They can be flattened the same way they hammer circular saw blades so they will run flat an a given RPM. jimyjack...
1828
mgrogg@...
mgrogg51
Oct 9, 2008 8:35 pm
Turn it flat on a Brake disk lathe. MG 1a. airgap between stator and magnets Posted by: "hoverindia" hoverindia@... hoverindia Date: Thu Oct 9, 2008...
1829
Kenneth Grome
kennethgrome
Oct 9, 2008 8:55 pm
Greetings, I'm hoping to learn more about rotor issues from the folks who know about these things ... I've seen rotors with notches cut out of them around the ...
1830
Steve Spence
sspence65
Oct 9, 2008 9:00 pm
I used to glue the magnets to the plate before flooding with resin. Now I screw them to the plates. Steve Spence http://www.green-trust.org...
1831
Steve Spence
sspence65
Oct 9, 2008 9:13 pm
Iron or steel is preferable. Steve Spence http://www.green-trust.org...
1832
Brian Rodgers
outfitnmbr
Oct 9, 2008 9:14 pm
Hammering steel flat is an art, if not a lost art. Making the rotors run with the proper run-out tolerance is probably impossible now that the magnets are in...
1833
hoverindia
Oct 10, 2008 2:12 am
Thanks for your comments everyone, I made the magnet discs from 6mm steel plates and followed all the steps correctly. I think the cut in speed is a bit...
1834
Kenneth Grome
kennethgrome
Oct 10, 2008 2:12 am
... That's what I suspected, thanks Steve. The reason I'm so interested in this is because I may have a source of inexpensive aluminum disks that are machined...
1835
Steve Spence
sspence65
Oct 10, 2008 2:17 am
I'm pretty sure you will be disappointed with the results if you use a aluminum plate. Steve Spence http://www.green-trust.org...
1836
jt
thegreentrader
Oct 21, 2008 12:09 pm
I have two generators rated at 3 and 8 kw, One (3kw)I turned into a PMG with an 8 magnet rotor and rewound the stator. I get some reasonably good voltage at a...
1837
hiburd28
Oct 22, 2008 1:56 pm
i was thinking of using truck bed coating from a spray can to coat the rotors. like the kind you buy from auto zone. i know its tough and durable and last a...
1838
Dan Nicoson
dannicoson
Oct 23, 2008 10:51 pm
What is the minimum speed that a coil of wire has to move through a magnetic field in order to product useable levels of electricity? I do realize that more...
1839
Collette
silver_spiri...
Oct 23, 2008 10:53 pm
Hi guys, I am just wondering if anyone can tell me how to avoid the wires to get tangled when the wind generator turn on the mast. I have seen many wind...
