Posted by clare on December 14, 2014, 7:49 pm
There is no modification made by converting to Permanent Magnet that
enhances it's low RPM function. A full fielded EM alternator has every
bit as much magnetic field as a PM, and has the advantage od being
able to start in lower wind conditions due to being able to start
without any cogging.
At the expense of requireing sometimes more field current than the
unit outputs at low speed.
The only advantage of PM is you have no electrical overhead to
Posted by amdx on December 13, 2014, 5:46 pm
On 12/12/2014 11:38 PM, firstname.lastname@example.org wrote:
Posted by clare on December 14, 2014, 5:15 am
Can work, but with a loss in efficiency at the expense of extra
Posted by amdx on January 6, 2015, 2:12 pm
I ran across this video, has some good ideas.
Posted by Paul Dudley on December 13, 2014, 11:08 pm
On Tue, 09 Dec 2014 13:54:10 -0600, Paul Dudley wrote:
Hey Y'alls... Just checked in to look at replies. Still cookin'. Some
of the 'home alternator' motors are designed with two magnet rotors
circling the stator. Double the power. Then as mentioned pulley ratio
power ( or gear ). But no. Not a car alt/gen. But they also talk 6 - 10
foot blades. I've decided to go with(3)26" blades to start. I'm quite
the newbie at this stuff and I need to suppliment my solar panels on
cloudy but windy spells. My use so far (  35ah 12 volt battery bank-
2k-4k inverter ) is to provide lights and some 110 power in my barn.
Nothing to do with departing the grid at the house. I did the PVC blades.
3 of them.
From stuff I've read lately the treadmill motors are low rev as a
generator and good for windmill/turbine. Plus it's DC. Ready to hit
the batteries. I'd like to try one and if it helps suppliment the
batteries then I'll go for more. Still in learning. Hell .. I just
recently learned what a diode is. And how/where it's used. Havin'
fun in the mean time.
Thanks again to all who've posted.