WindTura 750 Permanent Magnet Alternator

750 Watt Wind Turbine Generator Permanent Magnet Alternator

This generator will make over 1100 Watts in 35 mph wind.

Many small wind turbine power curves violate the laws of physics. Rather than provide fabricated power curves and specifications that try to obscure the reality, our "real world power curve" shows you exactly what you can expect from the Windtura 750. Watch our videos below for more information.

Specifications

Perfect for charging 12 and 24 volt battery banks or a grid tie
Alternator produces 3-phase AC electricity (more efficient than DC electricity)
Use our 80 amp 3-phase bridge rectifier to convert 3 phase AC current to DC for battery charging
Threaded shaft is designed to fit hubs with a 5/8 inch diameter center hole

Learn more about the WindTura 750 and our measurements of Open Voltage versus RPMs and Shorted Amps versus RPMs.

Blade Recommendation

We recommend a 75-80 inch (190.5 – 203.2 cm) rotor for the Windtura 750. Our WindGrabber blades sets with 5/8-inch hub work great! We do not recommend using the thin black or grey plastic 28-inch Airx type blades on this PMA. They are not powerful enough to turn it!

About the Windtura 750 Magnetic Rotor and Copper Stator

8 large #42H neodymium magnets. Composed mainly of Neodymium (Nd), Iron (Fe) and Boron (B), these high-grade rare earth magnets are the most powerful permanent magnets on earth!
Hardened steel shaft. The shaft is coated with a polyurethane clear coat for protection.
Magnetic rotor is completely coated and sealed with an epoxy paint
Completely sealed bearings for long life
Windtura 750 Copper Stator weighs over 10 pounds (4.5 kg)
Oversized stator for maximum power output

About the Windtura 750 Housing

Upgraded 304 stainless steel front and back covers
6061 extruded aluminum body
Housing completely seals/protects copper stator and magnetic rotor
Excellent corrosion resistance and heat dissipation

So how does this thing perform?

Rather than just provide you a graph, we like to prove exactly what kind of output you can expect from the Windtura 750. Below are videos showing real-time POWER coming from the PMA for 24 Volt and 12 Volt battery banks.

SKU: WGN-PMAO-75

Attachment	Size
Windtura 750 Owners Manual	581.13 KB

$389.98

Weight: 25 lb.

FAQ by product

Question: What kind of wire do I need to connect charge controllers and your PMA?

I would use 6 or 8 gauge for the dump load wiring and a 60 amp fuse for the dump loads. 10 gauge wire should be fine for the generator to the battery bank. A 60 amp fuse for the generator is good. The 1 Amp fuse is for connecting the charge controller to the battery bank. The charge controller only draws milliamps of current.

Question: What is the maximum amps that the 500-Watt Windtura 500 PMA can produce?

This depends on the wind speed and your load. Realistically it can do about 35 amps in 25-27 mph wind, but it could do more if it spins at higher RPMs.

Question: These Delco generators on Ebay put out 1500 Watts and your PMA puts out only 500 Watts? What am I missing here?

Well, first of all, many of these Delco or alternator-style PMAs are rated for conditions that are absolutely fantastical. You will rarely get your Delco PMA to produce 1500 Watts because it probably requires an impossible number of RPMs.

Delco PMA's will also rust out in 2-5 years because on a wind generator they are open to the environment. They were never designed to be out in the rain--they were designed to be under the hood of a car.

Under real-world conditions, the truth is that the Windtura 500 wind generator will make more power. If it does not, send it back for a 100% refund--including shipping!

Question: What's the torque factor for your Windtura 500 PMA?

Start up torque is about 0.75 N*m. After that, the torque will depend on your load so you would have to determine that yourself using your load.

Question: Can your PMA generator can handle constant speeds of between 3000 to 4000 rpm?

Yes, it can handle that rpm. But, do not exceed 60 amps.

Question: Which blade set is the most cost effective to drive your pma in a low wind area?

Our 35-inch WindGrabber blades are best-suited for our Windtura 500 PMA--with a 5/8-inch hub.

Question: How do I connect wires to the rectifier? There is no hardware of any kind.

You can use a nut and bolt to attach a ring terminal to each connector on the rectifier.

Question: Do you have a more detailed datasheet showing Volt and Amps versus RPM?

The Windtura 500 gives about 12 volts per 90 rpm. Amps depends on the load. For a 24 volt battery bank, it does about 20 amps at about 600 rpm. It will put out even more amps at that rpm if it is charging a 12 volt battery bank.

We provide a Power Curve that shows power production of the Windtura 500 attached to a 24-Volt battery. Click on the image of the generator or note the "Downloads" available at the bottom of the product description.

Question: Does your PMA contain a voltage regulator to output 14.4 volts?

No, it does not. We sell charge controllers for that, and they will control the charge to the battery bank.

Question: I've heard that Neodymium magnets lose their field strength within 6 months or less if used on a regular basis.

The magnets in the Windtura 750 will not lose their magnetization under normal operating procedures.

The Neodymium magnets (NdFeB) we use are graded as #42H. This means that they have a maximum operating temperature of 248 degrees Fahrenheit, and a Curie temperature of 644 degrees F. To lose field strength, you would have to consistently operate at extremely high temperatures. The Curie temperature is regarded as the temperature at which the magnets lose their field strength entirely.