I am building a v-axis wind turbine. I need to know what kind of DCmotor to use for a low RPM DCgenerator. Help me?

The winds in my backyard aren't extremely strong, but I want my design to work and provide a good amount of power if possible.  What kind of DC motor do I need?  Is it easy to create a DC generator from scratch for this type of thing?  Would the ideal motor have a low RPM?  (Because I'm pretty sure my turbine will have a low RPM) Low torque?  Obviously I'm just starting to wrap my head around all of these ideas.  How do I know which motor to get based off the information I am given from the site?

Right now I am looking around at www.allelectronics.com , if anyone knows of a better site that would also be appreciated as well.

Bottom line: I'm looking for as much power as I might be able to get, but I have low winds, and not a whole lot of money.  I was thinking I might be able to setup the axle to a pulley system with some sort of rubber band going from the axle to the motor, would this work?

I know it sounds liek I haven't done my homework, but truly I have, I'm just getting drowned in the options and choices and possibilities at the moment.

Thanks so much for you help!  I truly do appreciate your time to help me!

Best regards,

Aaron

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al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

al.clark.73 years ago

I have a well that pumps water into a holding pond and we want to "recapture" some of our energy ; I need some help , the water drops 5 feet from a 2 inch pipe and the flow is 80 gallons per minute , our electricity is in single phase and is AC (off the pole) I want to put the washing machine generator located to be turned by the flow of water and just want to know if this is a good or bad plan?

kwazai5 years ago
Otherpower.com
You will need to check your site- you'll probably need a very large drag type mil to make even a small genny work.
http://www.youtube.com/watch?v=x1HWPSSQU4w
http://www.youtube.com/watch?v=YCGj5W3UNS4

these are good with small stepper motors or converted pc case fans- a few LEDs worth of power when the wind blows. Where I'm at thats februray and march usually.
Byron W5 years ago
I would use a Wind Sceen wiper motor off a truck.
Try to get a hub motor used to power electric bicycles.
These are low rpm motors ranging from 120 to 160rpm typical pumping out frm 4 to 9 amps of current. Voltage are typical 36 to 48 voltsDC.
You need a 20Amp Rectifyer as blocking diodes to prevent flow of current from battery to the motor during off sunny period.
.
If you get the 250 watts motor ,expect to ge about 80 to 90  % of the power.
you can choose a maximum of about 400 watts from old electric bikes from scrap yard .
The hub motors comes with brush and some models are brushless.
Im building 1 to supplement a 20 watts Solar Panel to charge a 120 AHr 12V lorry battery.Im contemplating using a 300W Computer UPS to invert it to AC to power my home Computer!
Work on your CPU with green Energy!
timothywooi@gmail.com Malaysia 
Dr.Bill7 years ago
It might be possible to get a PM motor for free from a power wheelchair company. They remove the motors not because the motors are bad so much but because the gearboxes crap out. Cut the gearbox off and you have a nice 100W generator motor @ 12v +/-.
Dr.Bill Dr.Bill7 years ago
For Free !
If your considering using those dc brushless fan in a pc. Get an old printer scanner and pull out the stepper motors they make very nice low rpm generators , but it generates 3 phase electricyty that can be easily rectified using 6 diode and it makes near perfect dc after retification. The only draw back for steppper motors is that thay don't produce much poweer. You could mabey string a couple together for a greater wattage. another type of dc motor that might work is the series dc motor, but that requires much more rpm.
iced8 years ago
Have a look at this NZ site http://www.ecoinnovation.co.nz/c-58-smart-drives.aspx
. Permanent magnet washing machine motors make great generators- depending where in the world you live you choose different models. Last year we built a Savonius with a 200 litre drum sawn in half  and a Smart Drive (F&P) motor as the generator. Some kind of gearing is beneficial . Star/delta transition is good. We left the wiring as is. These critters have plenty torque, just low rpm, hence gearing up is good. Quite slow so doesn't need over speed protection (the outside edge is limited to about wind speed (tip/speed ratio =1)). The Lenz2 turbine was inspirational.The materials we used: square section mild steel, mild steel shaft & existing stainless motor shaft, HDPE drum, self aligning bearings (all up cost $300 NZ dollars). The slot in the base allows the "blades & shaft to be unbolted at the bearings and removed form the frame. The generator & its shaft screw "anti-wind" into the blade shaft.
Painted.jpgGenDetail.jpgFinished.jpg
snafell8 years ago
Check out the following website www.reuk.co.uk on this site, amongst loads of other stuff, is plans for VAWT, how to make your own generators, etc.
The site is 'the dogs bollocks"
Andy
fukenfooser8 years ago

My
$0.02
Study for a month or longer here
"http://www.fieldlines.com/"
This is the site for making your own power
:)
ak49er8 years ago
Although it may need some gearing to go fast enough, and you did not mention how large this wind turbine is, you could try a Chevy alternator- they self-reguate the output voltage to about 14volts or so, which is what you need to charge a Sealed Lead-Acid (SLA) battery. They should also be *relatively* cheap compared to most large DC motors, especially if you get it used/refurbished. However, it also wouldn't be as efficient as a good DC motor.
Safetylast8 years ago
Hey, I'm just like you (broke, novice, and in the R&D stage). check out <a href="http://www.velacreations.com">www.velacreations.com</a> and <a href="http://www.otherpower.com">www.otherpower.com</a> for all the info you could ask for. there is a RPM per volt formula for motor/generator selection and Ebay maybe your best source. Alot of people use Ametek motors, but demand has driven the prices up, but i think any brand of similar motor would work. I hope that helps and don't forget to keep us all posted of your progress!
Mr. Retro (author)  Safetylast8 years ago
Nice to know there are others just like me bear7670.  Thanks so much for the reference sites, I'll be sure to check those out and draw every drop of info I can from them.  I have heard of the Ametek motors, but as you mentioned they are extremely expensive so I will probably have to look elsewhere.  I'll work on setting up an instructable for my progress.  Thanks for you help, bear7670, feel free to send me a message anytime if you have questions, suggestions, etc.  I'm sure we can help each other somehow, right? ~Aaron
itsthatsguy8 years ago
low rpm means less power, and since its a dc electric generator torque/rpm/voltage the best kind of a motor is a brushless motor, these are more expensive but have such low movement resistance they can be spun by almost any wind, these types of motors can be found in cd players and computer fans, as for connection you might have some trouble, the axis of a brushless is the turbine itself so its generally about 1" wide, i would hot glue a rod onto the motor and use a band system to deliver the power, or just glue the turbine to the motor.
Mr. Retro (author)  itsthatsguy8 years ago
I am currently wrapping my head around all that you have said, and am very grateful for your response; however, I do have some immediate inquiries:  Is it possible to remove one of these brushless motors from a computer fan?  Although  I would love to buy a brushless motor, I simply do not think I have enough money and was wondering if buying a cheap computer fan might work just as well in its place.  If I did this, the fan would basically work as a generator when spun in reverse?  Am I understanding that right? Or have I missed something?  Thank you again for your help. ~Aaron