I've expanded our electronics tutorial page with a discussion of Ohm's Law, and Power vs. Energy. This is an important cornerstone to any solar and offgrid...
3002
Stuart Perkins
stuman40
Aug 25, 2010 12:49 am
Hi Group, I am looking to expand my off-grid capabilities, and hope to build some home made wind generators. I will be perusing the archives before I ask any...
3003
Richard
rich.larson44
Aug 25, 2010 12:50 am
Has anyome suggested or entertained multiple rotors with control for controlling speed and start up? I would foresee multiple coil disks so the generator...
3004
Steve Spence
sspence65
Aug 25, 2010 12:53 am
I would love to hear your solution controlling and limiting the current, and why you think it's not that difficult. Steve Spence Renewable energy and self...
3005
mgrogg51
Aug 25, 2010 10:22 pm
I considered that idea of multiple disks early on, but rejected it as being too much mass to try to turn a low wind speed. I think the better approach is an...
3006
Richard
rich.larson44
Aug 28, 2010 2:31 am
Of course I was postulating an idea. As an electronic engineer I would have no problem designing current limiting circuitry to limit the load on the coil...
3007
Steve Spence
sspence65
Aug 28, 2010 1:17 pm
Get them while they last at http://www.green-trust.org/products/...
3008
Terri Weaver
speedracerterri
Aug 30, 2010 1:00 am
Hello, I just wanted to tell you thanks for the heads up. Patrick Kelly is awesome. Terri ________________________________ From: arthujt <arthujt@...> ...
3009
Joe mijdtr
joeokforme
Oct 11, 2010 9:42 pm
so DF says ... are we talking about coils and magnets a further distance from the shaft, thus perhaps needing more power or strength to fight lenz because of...
3010
John L
johnlackey
Oct 13, 2010 2:33 am
I think cup magnets could minimize the weight of the rotors. They could be glued to any rotor that is strong enough to prevent warping. The cups would...
3011
Dan Fink
danbob88
Oct 13, 2010 11:37 am
Hi Joe; More info pasted in below...DAN FINK so DF says ... are we talking about coils and magnets a further distance from the shaft, thus perhaps needing more...
3012
Joe mijdtr
joeokforme
Oct 14, 2010 12:10 am
thank you, dan. you saved me from alot of self induced confusion. peace out, joe...
3013
Joe mijdtr
joeokforme
Oct 14, 2010 12:11 am
i saw this link posted in a prior post. i have looked at it before and have been trying to contact a dealer they are made in canada but there are us dealers....
3014
usagaucho
Oct 14, 2010 12:11 am
Great group, I am glad I found it and to be a member. I created 9 stator 15 gage stator coils with 60 turns each. I decided to weight ea coil to verify that...
3015
Tom
banjo-tom...
Oct 15, 2010 12:33 am
Yes . I did once . $6,800 cad without the tower .... double it with a tower. hope this helps....
3016
Joe mijdtr
joeokforme
Oct 16, 2010 5:04 pm
thanks tom, i got a price quote just the other day : 5kw generator ,, 5kW 250rpm AC 3-Phase : $5200.00 + S/H usagaucho,, i think there may be some slight...
3017
usagaucho
Oct 17, 2010 7:12 pm
I have spread out the different coils among the 3 phases in order to mitigate any effects and have a balanced the generator in this way: Phase 1: weight in...
3018
Michael
krazatchu
Oct 23, 2010 3:04 am
Hello group... As the subject indicates, I'm interested in the effect of using alternative materials (aluminum and plastic) for the stator and rotor. I...
3019
Dan Fink
danbob88
Oct 23, 2010 1:23 pm
Hello Michael; Your output would be reduced by a factor of 4 to 5 times compared to using steel rotors....a waste of your magnet dollar. Also, your magnetic...
3020
bbgmnn@...
johnlackey
Oct 23, 2010 11:53 pm
I built a small Axial flux alternator using steel rotors, which is the accepted norm but very heavy. I am now working with cup magnets. the metal cup performs...
3021
Dan Fink
danbob88
Oct 24, 2010 1:08 pm
Hi John; I'm curious to find out from you how much flux leakage you will get through the back of the rotor, and how much is prevented by the cups. Please let...
3022
zippy_1999_1999
Oct 25, 2010 7:45 pm
Hi I am just starting to look into this whole topic of wind generators. But one thing that I do know is that the Neodymium magnets used have a maximum...
3023
Henry
hdavis30318
Oct 25, 2010 7:45 pm
If machining and weight are issues, couldn't a thin laminate of steel be applied to the other material? Henry Davis...
3024
keithmobile73
Oct 25, 2010 7:45 pm
I cant wait to receive my alternator. Getting Realy excited now....
3025
Steve Spence
sspence65
Oct 25, 2010 7:51 pm
Who did you get it from? Steve Spence Renewable energy and self sufficiency http://www.green-trust.org http://arduinotronics.blogspot.com/...
3026
sanjeev rao
sosweet_san
Nov 2, 2010 3:14 am
My apologies for not posting this doubt in related forum, but dont know where to go with it in axial flux we are following a rule of thumb as poles are related...
3027
The Dragon
nogardthe1
Nov 11, 2010 3:20 am
Woke up this morning wondering about something... Why do you offer a motor, belt driving an alternator on your website, instead of offering a motor with an...
3028
Steve Spence
sspence65
Nov 11, 2010 3:31 am
alternators are ideal for high speed engine driven projects, due to ease of power control. cheaper too. an axial flux on that engine gen application would...
3029
The Dragon
nogardthe1
Nov 11, 2010 11:53 pm
Ahhh... And here I was thinking that an axial might allow the motor to be throttled down, thus reducing the noise output. I never dreamed that using an axial ...
3030
Steve Spence
sspence65
Nov 12, 2010 12:14 am
Throttling down the engine reduces the available hp. That engine is only 6hp to begin with (3kw max). The magnets in an axial flux cost more than a car...
