... Gabriele, If you are able to drill precision holes in accurate locations, it is possible to mount and hold magnets with bronze flat head nails such as...
2252
roundtheglobe
May 4, 2009 3:30 pm
Hi Butch, while I take my time translating some terms from your post( not english native tongue) I tell you why I was looking for a no-resin system. My idea...
2253
John
dbsleder
May 5, 2009 3:27 pm
First post- I think I have overlooked a fact in winding coils. I'm using 12 magnets/rotor, 9 coils, 3 phase series. Would the voltage from each of the 3 coils...
2254
naturaledge1957
May 5, 2009 3:29 pm
... Hello I'm a newbie , is anyone useing the 1//4 thick wedge magnets ?I think they are 2"tapered to 1" and what about the round magnets ?Thank you. Brian...
2255
charlieknox
May 6, 2009 2:13 pm
In the Homebrew Wind Power book, pg 210, Fig 16.14, a 2.5" hole is cut into the rear wooden hub and the blades. Does the cast wheel hub and bearing cover...
2256
Rick
ricksidebottom
May 6, 2009 2:49 pm
I have been playing with different designs in preparation to building my first alternator. This is 20 3/8 x1/2" long n42 magnets in 10 groups with 48 coils....
2257
John
dbsleder
May 6, 2009 6:20 pm
I sure would appreciate some feedback on my question so I can proceed. John...
2258
Steve Spence
sspence65
May 6, 2009 6:26 pm
yes, each of the 3 coils in phase have additive voltage. why would you unwind to 2/3rds? how many windings did you make and what size wire did you use? Steve...
2259
JP
dbsleder
May 7, 2009 9:49 am
It's been some time ago I wound them, and my memory isn't very good, but I used # 18 or 19 wire and wound a test coil with something like 115 turns, and test...
2260
Steve Spence
sspence65
May 7, 2009 9:55 am
for a 48 volt system, you need 144 turns or so. why did you pick 275 turns? that's way too many. Steve Spence Renewable energy and self sufficiency ...
2261
Dan Fink
danbob88
May 7, 2009 11:49 pm
Hi Charlie -- Yes, the cast hub and grease cap do stick out that far in the front. There's a bit of extra space included by cutting into the blade roots also...
2262
Dan Fink
danbob88
May 8, 2009 12:11 am
Hi Brian -- Generally wedge-shaped magnets are quite a bit more expensive than round or rectangular magnets of the same grade and mass, because the wedge is...
2263
Steve Spence
sspence65
May 8, 2009 12:13 am
Our construction article on building your own wind turbine is finally finished. We are uploading an interview with Jim Juczak on the history of the turbine to...
2264
JP
dbsleder
May 8, 2009 10:23 am
Steve, thanks for the input!! When winding coils, I had no reference to go by, plus the book of Hugh's we were using only had 12 volt, as I recall. I built a...
2265
Steve Spence
sspence65
May 8, 2009 10:34 am
Get Dan's book from www.otherpower.com, and our instruction guide at ...
2266
naturaledge1957
May 8, 2009 12:21 pm
2267
Steve Spence
sspence65
May 8, 2009 12:39 pm
http://www.green-trust.org/DIY%20Wind%20Turbine/ Free video and more info at http://www.green-trust.org -- Steve Spence Renewable energy and self sufficiency ...
2268
Robert Copcutt
robcopcutt
May 8, 2009 2:26 pm
If you really have wound the coils so that one will give you sufficient voltage then you could connect them in parallel instead of series. This might be a...
2269
Steve Spence
sspence65
May 8, 2009 2:29 pm
there are three sets of three coils. the three coils in each phase are in series. The three phases are connected at the center, with the end wire of each phase...
2270
Robert Copcutt
robcopcutt
May 8, 2009 3:25 pm
Let us assume John has essentially 3 pieces of wire, one for each phase. For each phase he has wound 3 coils and there are 2 lengths of wire between the coils...
2271
Steve Spence
sspence65
May 8, 2009 3:33 pm
Yes, it could be done that way, if he can make sure the number of turns on each coil is the same, and stacked in the same direction. Most of us use a Y wiring...
2273
Deron Kazmaier
grasshopperllc
May 8, 2009 11:08 pm
You sure about that Steve? One leg of all 9 coils would be connected at the center, and every 3rd coils opposite leg would be tied together and coming down to...
2274
Steve Spence
sspence65
May 8, 2009 11:17 pm
one end of a 3 coil series connects at the center with the other two ends of a 3 coil series. the other end of each 3 coil series goes to the 3 phase rectifier...
2275
Deron Kazmaier
grasshopperllc
May 9, 2009 1:15 am
Yes. That is how folks are hooking them up normally. Why can you combine c1p1+c2p1+c3p1? Because the phase of those 3 coils are in sync. They each have a...
2276
Steve Spence
sspence65
May 9, 2009 1:21 am
Then you would have to completely redesign the rest of the unit from blade size to diameter of alternator. You can do anything, but not everything will work...
2277
John
dbsleder
May 9, 2009 8:25 am
I'm still following the posts, folks!! Appreciate the input. I'm leaning toward removing some of the windings since the stator is still not cast. We will first...
2278
charlieknox
May 9, 2009 8:28 am
our 10 footer has stainless steel threaded rod, nuts, etc, but I need to paint the metal parts, magnet rotors, stator, etc. I've got oil based metal primer,...
2279
Arthur C. Sanford
impressiveho...
May 9, 2009 8:29 am
Hi Steve, Do you know what is meant by one in hand or two in hand coil windings? Thanks. Arthur From: axialflux@yahoogroups.com...
2280
Arthur C. Sanford
impressiveho...
May 9, 2009 8:30 am
Hey Steve, I just went to Wind Power 2009. Most of the windmill generators I saw had overlapping coils. Why does it seem like the commercial ones are wound...
2281
Steve Spence
sspence65
May 9, 2009 8:57 am
Automotive paints designed for metal and fiber glass work well. I use rustoleum for non-galvanized parts. Steve Spence Renewable energy and self sufficiency ...
