DIY 1000 Watt Wind Turbine

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Introduction: DIY 1000 Watt Wind Turbine

About: Professionally, I'm an IT Engineer (Executive Level) and Electronics Tech. I'm a Amateur Radio Operator (KK4HFJ). I lived off grid, with Solar (PV), Wind, and veggie oil fueled diesel generator power for 6 y...

We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It's a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary.

Update: DIY Amp Hour meter for monitoring charge!

All about homebrew wind and offgrid power systems, the complete reference!

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Step 1: Build the Magnet Disks

We had 12" steel disks hydro cut. We cut a template for mounting the magnets. Then we mounted 12 grade n50 magnets around the outside edge. We then built a form, and poured the resin with hardner.

Step 2: Build the Coil Disk

We wound the nine individual coils, soldered them in a 3 phase wye configuration, and encased them in resin. We used 35 turns of 2 parallel strands of 14 gauge enameled (magnet) wire for 12 volts. Use 70 turns of single strand for 24 volts. # 3 phase diagram shown here shows 3 stator coils. each of those coils is actually 3 coils in series. coils 1,4, and 7 are series together, 2,5, and 8 are series together, and 3,6, and 9 are series together.

more details, see the following page 15 for the series star, 1-y diagram.

http://groups.yahoo.com/neo/groups/axialflux/files

AXIAL_FLUX_HowItWorks.pdf

Step 3: Build the Bearing Assembly

Two Harley Davidson wheel bearings are inserted into the pipe, with a smaller pipe locked between them to keep them in place.

Step 4: Construct the Blades

The blades are 2" x 6" pine, cut at 10 degrees on a table saw, and sanded into a rough airfoil. Not perfect, but close enough.

More can be found at

http://tech.groups.yahoo.com/group/axialflux/

http://www.green-trust.org

http://youtube.com/watch?v=o9EEHFKEckM

Step 5: Further Reading

2 People Made This Project!

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1,882 Discussions

0
AlexK212
AlexK212

2 years ago

Hello greetings

How do you control the battery charge

What device do you use to control the load

I would like to know the characteristics of the device for the charge control of 1000 watts

thanks for your attention

0
sspence
sspence

Reply 2 years ago

We use a diversion control. Basically, when the batteries hit a certain voltage, a load is attached, like water heating elements. The reason this is done is that if you were to disconnect the wind turbine, like you do with solar, it would self destruct.

0
tcmarlar
tcmarlar

Question 5 weeks ago on Introduction

Hello, I'm using your tutorial to build a similar turbine. I just purchased a few magnets (3"x1.5"x0.75" N42 neodymium magnets with 166lb pull strength) and 16AWG magnet wire and just made my first coil with 100 turns, leaving a space in the middle of the coil about as wide as the magnet. Just for fun I was waving a magnet over the coil of wire with the two ends of the coil hooked to a digital multimeter and I don't see any voltage or current no matter how fast or close I run the magnet over the coil? I'm hesistant to continue with the rest of the project if I can't get a simple voltage or current spike from my coil and magnet? Or am I crazy and I'm only going to see voltage and current at high speeds of multiple magnet spinning over the finished coil set?

0
BrentM76
BrentM76

Answer 10 days ago

You need a alternating magnetic field to induce a voltage

0
sspence
sspence

Reply 7 days ago

That is correct. That is the basis for this design.

0
sspence
sspence

Answer 4 weeks ago

Requires multiple coils in series and fast moving magnets.

0
assasinsareus
assasinsareus

Answer 4 weeks ago

Hello, Have you sanded the ends of the wire to get rid of the enamel insulation? You certainly should get some sort of voltage. The multimeter may also not be able to update fast enough for a single swipe. A scope would be better to get an accurate picture. The average voltage is likely equal to about 0.707 the peak voltage assuming an even three phase output. Attaching a resistor across the coil will allow you to gauge an idea of wattage the coil and magnets will produce. Current = Voltage / Resistance. Power = Voltage X Current

0
sspence
sspence

Reply 4 weeks ago

Yes the ends were sanded and soldered to the down cables going to the diode bridge in the battery room.

0
ictinc
ictinc

2 years ago

Respect!!! I've come across this project many times. Now that I've finally decided to built my own windmill, I want mine based on this one.

I do however have some questions.

I would like my generator to output 230 volts AC with a minimum of 1000 watts. How would I need to change the windings on the coils to do so? Also, would there be any disadvantages by changing the output voltage to 230v AC?

The reason I would like the higher output is because I eventually want to connect it to the grid. I also don't like the hassle and expenses of charging batteries.

My actual design of the windmill would largely be the same, however I would like to try to attach the magnets to the tips of the blades instead of in the center.

0
assasinsareus
assasinsareus

Reply 4 weeks ago

Did you get anywhere with the build? Ideally you generate a DC voltage and then use a grid tied inverter to convert and synchronise to mains. I know enough to be dangerous but trying to design my own system now.

0
sspence
sspence

Reply 4 weeks ago

We are charging a battery bank that feeds an inverter. We didn't have a mains to connect to.

0
sspence
sspence

Reply 2 years ago

Outputting grid voltage means a synchronous design (fixed rpm / Hz), far beyond the goals and parameters of this design. magnets on the tips? you would need hundreds of tips and coils .....

0
tricooltransformers
tricooltransformers

Question 10 months ago on Step 2

Is there any advantage by using thinner wire, more turns, and generating a higher voltage? Is there an optimum winding /voltage for maximum power generation and minimum losses for this generator?

0
Joe Daniels
Joe Daniels

Answer 5 weeks ago

I've been told thicker wire generates more electricity. As to your other question the force needed to turn the turbine increases as the amount of wire increases, so you would need more wind but you would generate more electricity if it will turn. At some point additional magnets are required to increase generation further.

0
Dadonator
Dadonator

5 months ago on Introduction

Hi I've signed up as a teacher and wish to download this page as a pdf. However I keep seeing the email verification request (for which I've responded several times). How can I get out of this loop and download my pdf? Thanks.

0
jessyratfink
jessyratfink

Best Answer 5 months ago

We've seen this a couple times! Your best bet is to sign out and in again - that normally fixes it. If not, clear you browser's cookies :)

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JasonA166
JasonA166

Question 9 months ago on Step 1

Good day, i have a question regarding your magnets. What direction is your magnetic field? Is it along the length or is it through the thickness? Secondly i just want to know, does it matter if the coils are inside or outside from the magnets? Thanks for this awesome build.

0
DennyJ9
DennyJ9

Question 1 year ago on Introduction

Where do I buy the magnets? Denny

0
MattB433
MattB433

1 year ago

Hi, Im inquiring about the directions of the magnets. If i understand all of the magnets on one plate should point north and all the others point south so that they attract towards eachother and create a field through the windings. is this correct?