Hi All, I'm a new member here, glad to join the group. Just thought I could help with this question. The magnetic flux across the air gap depends on the...
3805
Henry Davis
hdavis30318
Jan 15, 2013 2:18 am
Thank you for that Greg. Henry On Jan 14, 2013, at 9:28 AM, g.gibbes wrote: <Snip>...
3806
pecanguy
Feb 8, 2013 11:57 am
I am new to the forum and considering building an axial flux wind turbine probally 8 or 9ft. After looking at several designs, they all seem to be similar in...
3807
Steve Spence
kk4hfj
Feb 8, 2013 12:00 pm
There's virtually no cogging in these air core designs. 3 phase is simpler, and the 12 mag, 9 coil is easy to produce. That's my choice, and I don't see many...
3808
pecanguy
Feb 8, 2013 2:23 pm
Thanks Steve I guess that my main concern is what may be gained by the 5 phase design. There must be a performance difference. It may just be early...
3809
Doug Selsam
dougselsam
Feb 8, 2013 3:05 pm
How much does it cost to produce one of those 12 magnet, 9-coil, 3-phase generators for a 10-foot diameter rotor? What's the cost breakdown between the various...
3810
Steve Spence
kk4hfj
Feb 8, 2013 3:26 pm
It's a 24 magnet generator, 12 per plate. Last one I did was about $500. Probably closer to $1k now with magnet and copper prices what they are. I bet you...
3811
Doug Selsam
dougselsam
Feb 8, 2013 3:53 pm
Hi Steve: A possible option for some builders might be one of my alternators for 1100 bucks including shipping. www.PM-Alt.com I learned how to make a solid...
3812
Larry
larrygouge
Feb 8, 2013 5:32 pm
Are you Volts DC or Volts AC? Thanks, Larry in TEXAS From: axialflux@yahoogroups.com [mailto:axialflux@yahoogroups.com] On Behalf Of Doug Selsam Sent: Friday,...
3813
Robert Copcutt
robcopcutt
Feb 8, 2013 6:49 pm
... Warning, the magnets you linked to are magnetized in the wrong direction for axial flux! Robert....
3814
Steve Spence
kk4hfj
Feb 8, 2013 6:51 pm
Good catch. Those were polarized on the end, not the face. That said, cruise ebay looking for similar bargains, and you might find some magnets that will work...
3815
Doug Selsam
dougselsam
Feb 8, 2013 9:53 pm
VDC Sent from my iPhone...
3816
usagaucho
Feb 11, 2013 11:37 pm
I am looking to buy a oscilloscope to test the wind generators I am building. Any suggestions and recomendations on what I should get? Thx...
3817
Steve Spence
kk4hfj
Feb 12, 2013 12:12 pm
I use a cheap chinese brand, but not for wind turbines. What are you attempting to measure that a good multimeter doesn't show you? ... -- Steve Spence -...
3818
Dan Fink
danbob88
Feb 12, 2013 2:40 pm
We recently obtained a cheap ($60) Taiwan storage o-scope that looks to be based off a cheap android phone. It works, and because all we need it for is to...
3819
drsimm@...
drsimm1776
Feb 12, 2013 2:56 pm
Dan,Whom/ where did you get the oscope from? I need one - Don Simmons ... From: Dan Fink <danbob88@...> To: axialflux@yahoogroups.com Subject:...
3820
Steve Spence
kk4hfj
Feb 12, 2013 3:07 pm
I don't know about Dan's, but I've used this one. http://tinyurl.com/apqhhfd ... -- Steve Spence - KK4HFJ Http://www.green-trust.org Http://www.essnmag.com ...
3821
drsimm@...
drsimm1776
Feb 12, 2013 3:39 pm
MUCH THANKS Steve! Don Simmons ... From: Steve Spence <greentrust@...> To: axialflux@yahoogroups.com Subject: Re: [axialflux] Re: Affordable Oscilloscope...
3822
Doug Selsam
dougselsam
Feb 12, 2013 3:40 pm
I've seen O'scope Apps for the i-Phone, with some added hardware required. I bought an old used O'scope and had to pay almost as much again, just for a...
3823
usagaucho
Feb 12, 2013 7:30 pm
Basically the performance on the generator. I am considering using wedge neo mags that are .5" thick. testing it with different stators with varying coils....
3824
Steve Spence
kk4hfj
Feb 12, 2013 7:32 pm
Ok, but what do you wish to observe that a meter won't tell you? A meter will tell you amps drawn, and volts produced. It won't tell you waveform, but that's...
3825
ron ohler
ohler_ron
Feb 12, 2013 10:08 pm
Hi, there are low cost scopes out there that have LCD displays but also applications that use your computer as the scope. I don't know how practical those...
3826
Robert Copcutt
robcopcutt
Feb 13, 2013 12:07 pm
Testing generators with PC connected scopes is great. Capture a quick spin of the generator and measure the time between peak voltages (or zero crosses). That...
3827
Jeff
limodriverjp
Feb 13, 2013 12:20 pm
Hello I know a friend is using one like this, don't know if this is the one but like it, runs off your computer, ...
3828
Dan Fink
danbob88
Feb 13, 2013 2:43 pm
Hi Don! (howdy neighbor!) The one Steve linked to looks exactly like what we got. Email if you'd like to visit and check it out. -- Dan Fink, Executive...
3829
Rodger
pasuprez
Feb 13, 2013 8:35 pm
For a small inexpensive oscilloscope I've used an open-source one sold by SEEEDstudio.com, that you can find here: http://goo.gl/2lyod It's sample rate is...
3830
The Dragon
nogardthe1
Feb 14, 2013 6:59 pm
Here are a few more 'puter Oscope websites that might be of help to someone. ...
3831
usagaucho
Feb 19, 2013 12:13 am
A while back I built an axialgenerator with 9 coils of 70 turns 15GW with 24 1/4" wedge magnest. Does any one have any experience building a generator using...
3832
kk4hfj
Apr 3, 2013 11:27 am
Several years ago I designed these wind power design calculators. We have many new members since then, so I'm reposting for your enjoyment. feedback welcomed: ...
3833
Steve Spence
kk4hfj
Apr 12, 2013 8:59 am
Our favorite (and in our opinion, the best) DIY guide to off grid power systems and DIY wind turbine construction has to be "Homebrew Wind Power" by Dan...
