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Wind Turbine (Generator) 12v

by Prospect3dlab Oct 5, 2018
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what is the required bed size for the blades??? most people are limited on their bed size and it's what keeping me from making a turbine..... nobody put up any remix for your blade size and i find it interesting if you can add the information for bed size to the thing details..


has anyone done any tests with the voltage/amperage this could generate? I am looking to do a turbine with my kids this summer and this seems a good possibility. But I would like to get an idea of what it could feasibly generate. This is for hobby/education, but we do want it to generate some power.

It all depends on how windy it is where you live. I managed to get 12v 1A as written on strong winds, but i think it can help you if you plan to use it with, for example, garden lights or camping or charging phone (or two?) or something similar...
I saw couple of designs here on thingiverse, but i like mine, not because its mine but because i think its most rugged design on Thingiverse for wind turbine

i am for sure looking at yours. i was looking at the one that is listed as 50 watt turbine or something. That one is very elaborate. But way more work for the low power than i was hoping. This one, I am very excited about, seems like it's a clean simple (not in a negative way) and straight forward.

it is designed to be simple, because i dont like lotta support and hanging parts. Less parts=easy to maintain,assemble and less breaks

any chance of the blades being split to be printed on smaller printers? maybe with some dovetail groves or something to help hold together when they are put back as one piece?


I am working on that wind turbine since a few weeks, when I have some spare time ;)
My printer is just able to print 220x220x250mm. I just make a small redesign of the blades to print them in two parts, with two corners that interlock. I also used the Blade Design with the hole for the 1.5mm wire. In addition to the wire I used „Ruderer L530“ glue. I am quite happy with the result, the blades feel very stable! If you are interested in that design I could send you the files, but the design is not perfect and you have to grind or filing the interlocking positions of the print.

Hi, if you are interested, you can post files for your redesigned blades as remix :) Also, i would like to see finished turbine, when you finish it, you can even post it here on thingiverse :) Thank you in advance!

I would LOVE to give it a shot. Prospect3dlab and I have been working on some modifications to fit smaller beds too. I would love to give yours a print too.

Your pics look awesome. very nice!

mine are not so subtle....

obviously my daughter picked the color lol

I also made a complete electrical draft with all necessary components to build up
a charging circuit for a 12v battery. It includes dc/dc converters a charge controller some displays to show the actual generated voltage/ampere and a puls circuit board to flash a red led which is mounted on the turbine housing.
If you or somebody else is interested in that, I could also share that. But up to know it‘s untested because I am still
waiting for some parts.

would LOVE to see what you are working on with this. That was going to be my next step was to figure out how much power (if any) it's generating!

feel free to hit me up, im on twitter/youtube/email whatever!

twitter: crankycoderblog
youtube: youtube.com/crankycoder
email: jason.brunk@gmail.com

That is really cool. Thanks for sharing the progress and ideas. Keep sharing as you progress.

First of all, this is a very nice project and good designed wind turbine!!
At the moment I started to print the wind turbine and I already ordered some parts.
I was thinking about a braking system which stops the wind turbine at a high wind speed.
Is that necessary or does it makes no sense? What do you think?

Thank you very much! To be honest i thinked little about breaking system, but after i tried it on wind im not sure it is neccessary. Wind can get really strong where i live and i never had any problems. Let me know if you have any problems or questions about printing and assembling, i would really like to see it when its finished.

Yes, probably it is not necessary... but sometimes we also get some really strong wind at our place.
Last night I was thinking a lot about a acceptable solution for a breaking system. That’s quit not so easy.
I want to use the Wind Turbine in combination with a 10Ah Batterie to supply my garden lights.
I found an electro magnetic brake for the Nema17 Stepper. Probably I will also install this brake to stop the turbine at a very high wind level, but I am not sure if the brake has enough torque to stop the rotor. Maybe it makes sense to test it first without a brake, like you suggest.

I will post some pictures when I am finished :)

how much did you pay for it? where did you find it? any details on how you trigger it?

I paid nearly 9€ for the brake. You will find it on AliExpress, you can use this tag “Nema17 24 v stepper brake”.
I would like to measure the actual voltage from the stepper with an Arduino and a voltage sensor. . If the voltage increase a specified limit the Arduino will trigger a Relay which switch on the brake. So far that’s my theoretical plan, at the moment I am not sure, if it will work like this because I am not finished with printing. When I have assembled the wind turbine, I will make some tests with the brake.

would love to see how it turns out!


Any video of its working? Will be appreciated if you can give some technical details such as:
Start up wing speed
How much wind is required to produce 12V 1A current etc.


Hi! Unfortunately, I dont have any precise technical details, but i know that if you use nema with gearbox, it will work on moderate-strong wind, and if you use only nema17 without gearbox (there is stl model for that motor without gearbox, also) it will produce less voltage, but it will be activated even on low winds, which is good if you plan to use it with batteries.
Where i live is quite windy, so i can use version with gearbox

I'd like to see a wind turbine with any number of blades that is mounted on a shaft. At the rear of the shaft would be a large gear which would directly mesh with or be belt driven to not just one, but THREE NEMA steppers placed equi-distantly around the central gear shaft for heavier power generation!!!....do you think this is possible???

Yeah, but it would be impractical, since it would be same energy input from wind. It would be different only if you have longer blades, but since not much people are having printers bigger than 250x250mm, blades should be maded from separate parts. It would be just overcomplicated and fragile, since its 3d printed. I would rather make 3 generators like this than one generator with 3 motors

This turbine is beautiful, one of the most well polished versions I've seen on Thingiverse. My only slight criticism is that your blade design is pretty inefficient. It is very boxy and thick. You could quite easily improve the blades by just adding larger filets on the leading edge and more of a taper on the trailing edge.

Ideally, you would also want a blade that twists along its axis, such that the angle of attack is sharper near the hub and levels out at the tips. This creates more uniform lift along the length of the blade, and results in a turbine that can spin faster with less wind, however it is significantly more difficult to model and print. All that being said, your design is very nice in that you or anyone else can design new blades and easily swap them out! It would be easy to have a rapid prototype and testing loop to validate which blade design gives the best performance with your motor setup.

Disclaimer: I am not an aeronautical engineer and everything I said I learned from the internet. I may be wrong so others, feel free to correct anything I said. Just looking to help OP make more powah!

Hej! You can check last update, i designed new, more aerodynamic flins, and one of them have wire trough "twisting" axis for more stiffnes and better twisting under high winds, which should provide more efficency to the whole system :) I followed some common designs, used in proffesional wind turbines. Also, i designed all rotors to have 35 degree angle, which, by definition should be ideal and most efficient. :) Happy printing!

Please excuse my ignorance, but what is the "direction" of the gearbox? Shall the motor rotate faster than the propeller, or should the propeller rotate slower than the motor?

purpose of gearbox is that motor should rotate faster than propeller :)

I would go to a five or seven blade design. It will balance easier.

To be honest, i would not recomend it, it still need some torque for spinning on 5:1. Maybe it would work on 3,7:1, which im recomending up in text, but no need, it doesnt get that high rpm's anyway, because magnetic field in generator is slowing it down.