648Views18Replies

Author Options:

Best place to find/buy a cheap, high efficiency generator? Answered

I have to build a small wind turbine to generate electricity (highest voltage is the goal).   I'm wondering if anybody in the community would know where I could source the most efficient generators possible for price points of around $30 $50 and $100?

thanks!

David

Comments

The forums are retiring in 2021 and are now closed for new topics and comments.
0
rickharris
rickharris

10 years ago

Car dynamo or alternator although they need to turn at about 3000 RPM

0
Arshneil
Arshneil

Answer 10 years ago

Well a car dynamo is certainly something useful but i agree tht it might not be the best choice coz of the small size of the wind turbine.

0
ddrocketman
ddrocketman

Answer 10 years ago

Hmm my turbine is supposed to be a scale model with a propeller diameter of only a bout 8". I'm assuming this would not be able to run the alternator nearly fast enough.

0
ddrocketman
ddrocketman

Answer 10 years ago

This is "research", buddy. Just because I'd like to come first to people who have done it and enjoy sharing their knowledge for others learning. And I also asked a quite more specific question than what would be addressed in the instructables you linked me unless I had hours to look through all of them.

I know how to use search and I know how to use google thanks a lot.....Jack A.

0
frollard
frollard

Answer 10 years ago

Thing is, they DID do it already, and DID share it, in long, well documented projects. Doesn't make much sense to post it twice.

0
ddrocketman
ddrocketman

Answer 10 years ago

I understand that, my main question is only where I can source theses parts that's all. Where I can buy new/used generators cheap or what commercial products I would be able to take apart that would use a very efficient suitable motor.


I will look over the other instructables to see where they sourced their parts.

0
frollard
frollard

Answer 10 years ago

The quick answer is there is no 'quick, easy, cheap, good' source for surplus dc permenant magnet motors. HENCE why people build their own out of enameled copper wire and neodymium magnets.

0
Jack A Lopez
Jack A Lopez

Answer 10 years ago

You are welcome, sir. I'm glad that I could help you.

0
ddrocketman
ddrocketman

10 years ago

I found this useful article on the different type of motor one can use for a wind turbine and some info about relative efficiencies for anyone who's interested:

http://www.ehow.com/list_7581085_good-motors-wind-turbine.html

0
steveastrouk
steveastrouk

10 years ago

Efficiency is high magnetic flux density, from minimal airgaps, and a highly efficient magnetic circuit. High flux comes from good magnets, Neodymium-Iron-Boron are the best at the moment.

Alternators are always more efficient than dynamos.
Low resistance windings and high output voltages also help.

0
ddrocketman
ddrocketman

Answer 10 years ago

AHhh Great info thanks! Now I've got some more direction!

0
frollard
frollard

10 years ago

>>> look in the related ibles. There are several on MAKING your own. It will be the cheapest way to go.

0
ddrocketman
ddrocketman

Answer 10 years ago

The only reason I haven't committed to making my own is because I've been told that I won't be able to get nearly the efficiency to a purchase motor(generator)

....the rest of the turbine I was planning on constructing myself (Propellers, rotor, mount). I ill be purchasing gears belts/pulleys, and bearings. This is also to take time constraints into account.

0
frollard
frollard

Answer 10 years ago

The ones on here are very efficient. If you can build to any reasonable tolerances, it will be great. As for finding a motor, you'll spend a lot and get a little.

0
ddrocketman
ddrocketman

Answer 10 years ago

Ahh I see...Thanks for the advice...I'll look into what it takes to machine a generator of high efficiency.

0
ddrocketman
ddrocketman

Answer 10 years ago

Ah great thanks Ill try some of those I got from printers