DC Project Motor Generator

I am giving this 5 stars but it's more like 4.5 It requires quite a lot of torque to obtain voltages in the 12-to-14-volt range For experimenters who are trying to reach near perfect energy transfer this increased torque is likely going to be a problem. For the average person just trying to produce a little power this is fine. I ended up designing and building my own generator with far less needed torque. Good Luck!

I purchased this for a wind turbine demonstration project. From outer appearances, the motor construction is not great, but decent. I did not take it apart to examine the windings on the armature or brushes on the backplate. I used some custom heavier, turbine blades, so I did not get very high RPMs when using a fan for driving the turbine, but you can see from the graph that the "No Load" voltage output is generally linear with shaft RPM, and I would expect the generator to require over 1000 RPM to reach 12 VDC no-load output. When attaching LEDs or an appropriate step-down circuit to charge a cell phone or run a USB-connected lamp, I measured output powers between 100 - 350 mW. I attached a 15-in, 2-blade "Pacific Sky" turbine blade to the generator and got a no-load output of 15.5 - 17.5 VDC in a 4-4.5 m/s wind (as shown in the video), but had no way to directly measure the RPM of this particular blade. Extrapolating from the earlier data, I estimate 1400-1500 RPM. When attached to a 10-ohm resistive load, the voltage dropped to 1.3 - 1.5 volts, indicating an output power of around 200 mW, but I did not try to determine the optimum load for this blade configuration. For the price, it's a bit expensive for a child's science experiment, but it seems to have limited capacity at low wind speeds (~4.5 m/s) to do much besides trickle-charging phones or perhaps 12V batteries with the appropriate turbine blades and circuitry.

This wind generator is an excellent power source,I use for charging my boat battery along with a solar panel to get continuous power for my battery to use the power for trolling motor and my fish finder with also my radio.

I judt purchased it with the wind blades for my sun project back in the school it's really arrived in time and works perfectly. I recommend it for any wind generator project.

Not to impressed. I had to turn the motor with a high speed drill to get the advertised output. Also, I feel this requires more torque than some competitive products.

This is to be used as part of a small wind generator program I have used them with my classroom project for many years. They are robust, but they break after years of use, take downs, and rebuilding.

Worked great until I dropped it brook magnets in side Not good, vary fragile.

it purduces a great amount of voltage purfect if you add a dc to ac converter to us for camping