Whoa! 6" would ONLY be for the first layer of windings, and it would increase each subsiquent layer. The circumfirence of my coils is 11 inches, making the...
2087
Steve Spence
sspence65
Mar 1, 2009 11:34 pm
depends on how tight your coils are, but you are probably very close. I was going for the mean. Steve Spence http://www.green-trust.org Free People Search ...
2088
muhammad ali
ali_jcd
Mar 2, 2009 2:44 pm
can any one advice me how can i get more voltage from my alternator, i made a alternator with using of wire # 22 and 85 turns per coile(10 coils)Â and same...
2089
Steve Spence
sspence65
Mar 2, 2009 2:53 pm
You should have 9 coils, 3 series sets in parallel. You have phase cancellation, as two phases are being triggered at the same time. the 12:9 ratio is...
2090
muhammad ali
ali_jcd
Mar 2, 2009 2:54 pm
i built a alternator with wire # 22 and 85 turns X 10 coils and i used 12 nos magnets same size as coils but i produced only 1 volt on hundred rpm , so how i...
2091
Steve Spence
sspence65
Mar 2, 2009 2:58 pm
three coils in series with that many turns will make about 25 volts at 650 rpm. You need 3 sets of those and parallel the sets. that's 9 coils not 10. Steve...
2092
jerry freedomev
freedomev
Mar 2, 2009 4:03 pm
               Hi Steve and All,                         I've never been able to figure out why of 9coils to 12...
2093
Steve Spence
sspence65
Mar 2, 2009 4:08 pm
There's no radical peaks in 3 phase, and once rectified, it's pretty stable. if the coils and magnets were the same, then all coils would be triggered at the...
2094
Steve Spence
sspence65
Mar 2, 2009 4:10 pm
Read hugh's axial flux document in the files section. cogging is eliminated by not having iron cores. Steve Spence http://www.green-trust.org Free People...
2095
jerry freedomev
freedomev
Mar 2, 2009 5:27 pm
                 Hi Steve and All,                               I looked at Hugh's pdf in the files section...
2096
Neil Dennis
wombat_eagle
Mar 2, 2009 5:50 pm
probably dumb question, but wouldn't rectangular coils be better than round ones ? wombat...
2097
Steve Spence
sspence65
Mar 2, 2009 5:52 pm
Ours are rectangular. Steve Spence http://www.green-trust.org Free People Search http://buildittogether.ws/...
2098
j_andrewmiller
Mar 2, 2009 5:53 pm
The AF is not designed for only battery charging, the design is used and so popular because it lends itself to manipulation for different voltages and loads. ...
2099
ferrand
ferrandst
Mar 2, 2009 8:42 pm
Re: Off Topic: Need plans to build a wind powered water pump. Posted by: "John Parsons" Windpower4jp@... dbsleder Date: Sun Mar 1, 2009 3:33 pm...
2100
Steve Spence
sspence65
Mar 2, 2009 8:46 pm
Because this is an axial flux alternator group? Steve Spence http://www.green-trust.org Free People Search http://buildittogether.ws/...
2101
jerry freedomev
freedomev
Mar 2, 2009 8:47 pm
                  Hi Andrew and All,                       Like all fixed field alts as long as you limit the RPM you...
2102
John Bishop
ka3ohh
Mar 3, 2009 12:17 am
When the 3 phase is rectified you have 6 pulses approx. 60 degrees apart that are overlapping so you get a relatively smooth pulsating DC for each alternator...
2103
John Bishop
ka3ohh
Mar 3, 2009 12:19 am
Hi,  I couldn't open your larger pictures but the reason there is a 3 to 4 ratio of coils to magnets is so that several coils get "lit up" at the exact...
2104
John Bishop
ka3ohh
Mar 3, 2009 12:42 am
Hi,  Very sticky question. If you can eliminate the inside leg of the coil and make it triangular you can eliminate perhaps 1 inch of wire per turn which...
2105
Neil Dennis
wombat_eagle
Mar 3, 2009 12:52 pm
Yeah, John, that's the shape I was working on for my "toy", the idea to have the main part of the coil cross the magnet parallel to the "line" of the magnet. ...
2107
John Bishop
ka3ohh
Mar 3, 2009 12:53 pm
Hi,  Do you still have access to your coil leads? Are they all wired in series? Is every other one backwards or all they all wound the same? If you...
2108
Steve Spence
sspence65
Mar 3, 2009 1:05 pm
The magnets are supposed to be reversed, N - S - N - S, etc. There is no cogging in the AF design. every third coil is in series. Steve Spence ...
2109
Steve Spence
sspence65
Mar 3, 2009 1:08 pm
we added a temperature sensor in our last coil pack, and pack temperatures ran about 20 degrees higher than ambient in 20 mph winds, with batteries at 80 SOC. ...
2110
Dan Fink
danbob88
Mar 3, 2009 9:44 pm
Hi Jerry -- We explain it with diagrams in our book. Go to books.google.com and search for Homebrew Wind Power. Then search inside the book for 'number of...
2111
Dan Fink
danbob88
Mar 3, 2009 9:59 pm
Hi Jonathan & Jerry -- The first issue with direct grid tying an axial flux alternator is (as Jerry pointed out) the widely variable RPM when using wind power...
2112
Dan Fink
danbob88
Mar 3, 2009 10:03 pm
Muhammed, you don't provide enough information to answer your question. Hugh Piggott's older 5-phase turbine used 10 coils and 10 magnets. But for 3 phase, you...
2113
j_andrewmiller
Mar 3, 2009 10:46 pm
Hi Dan, Just some more thoughts on the matter. I have it under good authority that the sunny boy is nothing more then a windy boy with different firmware and...
2114
jerry freedomev
freedomev
Mar 4, 2009 1:52 am
Hi Dan and All, Thanks Dan and others on and off list for your help. I think I'm getting it now with the diagrams. Excellent book Dan. Read about 20 pages and...
2115
Erik Akia
erikakia
Mar 4, 2009 2:36 am
Hi Jerry, I don't suppose you have a guide or could explain how to build these blades? Thanks Erik Akia...
2116
erikakia
Mar 4, 2009 3:05 am
I can not seem to open the file "axial flux hp alt.pdf" that is in the file section. I have tried to download it and still no luck. Could someone please upload...
