Posted by mike on December 12, 2014, 2:43 am
On 12/11/2014 11:15 AM, Paul Dudley wrote:
This is third hand from memory, but,
There was a guy in Oregon who started with garbage disposal
motors and changed the magnets for more output.
Posted by amdx on December 13, 2014, 4:30 am
On 12/11/2014 1:15 PM, Paul Dudley wrote:
Depending on the size of your propeller, you could go to the junk yard
and get an alternator from a car. If you are at all resourceful, you can
probably come up with an alternator without spending any dollars, there
are literally millions around. I don't mean steal it, someone around you
is junking a car.
How big is your prop? How about a Savonius rotor? Keeps everything
near ground, easy to work on.
Here are a few examples, http://tinyurl.com/ngw5pbm
Give us an idea of what power you plan on generating, is a 1000 watts
max enough? A 100 amp alternator will do that.
Find some average wind speed maps for your area, get some info to start
Posted by clare on December 13, 2014, 5:38 am
An automotive alternator requires pretty high RPM, which necessitates
a SMALL "prop" to get the speed without the tips going supersonic -
and not enough "disc area" toproduce enough torque to generate more
than a few watts.
Posted by Vaughn on December 13, 2014, 3:35 pm
On 12/13/2014 12:38 AM, firstname.lastname@example.org wrote:
Not only that, unless modified with strong field magnets, they require
a hefty excitation current. In general, unmodified auto alternators are
useless for home/hobby-sized wind power.
Connected to a suitable small engine though, they can make a great
emergency battery charger.
Posted by clare on December 13, 2014, 4:30 pm
Which still require significant RPM to generate any appreciable power.