DIY mini wind generator

In places without electricity, there is a problem with recharging smartphones and other equipment. Using a power bank is only a temporary measure. It is much safer to acquire a free alternative source of energy. A homemade miniature wind generator is suitable for this purpose. Its performance is quite enough to recharge a smartphone.
DIY mini wind generator

Materials:



Making a windmill


First of all, I’ll explain about the heart of our windmill, which is the one purchased at AliExpress 220V mini motor generator.
DIY mini wind generator

This is a three-phase brushless electric motor (power 50 W), which at rated speed (10,000 rpm) is capable of generating about 220 Volts of three-phase voltage.But since it is impossible to create such speeds with the help of wind, only weak rotation is available to us, then such a turbine will give us about 12-20 V. This will be enough for our purposes.
Take a PVC pipe.
DIY mini wind generator

A motor is glued to the edge of a 32 mm PVC sewer pipe with hot glue. For reliability, it needs to be secured with a pair of worm-wheel clamps.
DIY mini wind generator

Having retreated 50 mm from the engine, a through hole is made in the pipe with a d10 mm drill, as in the photo. The tube itself needs to be cut. It is enough to leave 35-40 cm.
DIY mini wind generator

On the edge of the pipe opposite from the motor, a longitudinal cut 25-30 mm long is made. It needs to match the direction of the previously made hole.
DIY mini wind generator

The windmill tail is cut out of a piece of plastic or plexiglass. Using a heat gun, it is glued into the slot on the tube.
DIY mini wind generator

An M10 bolt is inserted into the hole in the tube with the motor and tail. A nut is screwed onto it.
DIY mini wind generator

Next, a bearing is mounted, which is pressed with a second nut.
DIY mini wind generator

DIY mini wind generator

A PVC adapter of 32 mm to 50 mm is mounted on the bearing. If it is a little smaller, then you can use a spacer from a piece of tube.
DIY mini wind generator

DIY mini wind generator

A 50 mm PVC pipe is connected to the adapter.
DIY mini wind generator

You need to put the blades on the motor shaft. They can be removed from a burnt-out fan.
DIY mini wind generator

If the seat diameter on the blades is slightly larger, then you should attach a suitable tube to the shaft and additionally use hot-melt adhesive.
DIY mini wind generator

To protect the motor from precipitation, a cover is glued to it. To do this, you can use a piece of 50 mm sewer pipe cut along the length.
DIY mini wind generator

To secure the wind generator you need to make a heavy stand. The easiest way is to mix concrete and pour it into a square mold lined with bricks.
DIY mini wind generator

A 50 mm PVC pipe, removed from the adapter on the fan housing, is vertically inserted into the resulting concrete pad.By the second day, the concrete is strong enough to support the generator.
DIY mini wind generator

DIY mini wind generator

When exposed to wind, the generator produces energy with a jumping voltage, this is normal. When connecting an LED bulb, you can see that it flickers. We first solder the wires from the motor to the three-phase rectifier.
DIY mini wind generator

And then to a step-down voltage converter.
DIY mini wind generator

DIY mini wind generator

After it, a stable voltage is supplied without critical surges, suitable for charging a smartphone with a voltage of 5V.
DIY mini wind generator

This is an inexpensive wind generator that is quite easy to manufacture. It can be placed on the balcony if you do not live on the first floor. And the wind should be enough to charge the battery of a cell phone.
DIY mini wind generator

Watch the video


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Comments (13)
  1. Guest Victor
    #1 Guest Victor Guests 22 April 2019 17:20
    5
    I didn’t hear anything new. I didn’t even notice the elephant - The main problem is the method of attaching the screw to the shaft is mentioned in passing - and this is the most important unit
    1. Vita
      #2 Vita Guests 23 April 2019 08:47
      2
      You need to repair (see) at least one Chinese fan, fortunately now many people prefer to buy a new one.
      1. Vita
        #3 Vita Guests 23 April 2019 09:58
        0
        I answered and then I ask myself the question, what will happen if the wind blows in the other direction. need to be stopped.
  2. Basil
    #4 Basil Guests 22 April 2019 19:30
    5
    with this method of attaching the screw to the engine, it will quickly damage it. The screw is heavy and will break the bearings or bushings. a belt drive is needed.
  3. Vita
    #5 Vita Guests 23 April 2019 08:51
    0
    There is another way to increase the voltage, namely, connect a capacitor in parallel to the winding, selecting the size.
  4. Guest Vladimir
    #6 Guest Vladimir Guests April 23, 2019 10:04
    3
    The wires will wrap around the post. You need either brushes or rotation limiters for the upper tube with tail and generator. With such a design of the bearing assembly, the bearing itself can easily be twisted out of the plastic pipe even in an average wind.
  5. Dmitry Spitsyn
    #7 Dmitry Spitsyn Guests 23 April 2019 12:39
    1
    I'm afraid that if there is no hurricane wind, it will take a week to charge the smartphone.
  6. Dmitry Spitsyn
    #8 Dmitry Spitsyn Guests April 23, 2019 12:51
    2
    If the LED lamp flickered, then the power is about 3 W, I think. Then another 5 Volt converter. Well, you'll shoot a maximum of 2 W. 400 milliamps. In principle, it will be possible to charge, but it will take a long time.
    1. Vita
      #9 Vita Guests 23 April 2019 16:36
      1
      There are several ways to increase voltage. I offered you one of these options. Unfortunately, the author made a number of technical mistakes (step-down voltage converter, immediate loss of voltage on the rectifier)
  7. Passing
    #10 Passing Guests 29 April 2019 16:05
    2
    Excuse me... isn’t it easier to charge using solar batteries... and, in principle, there are already such ready-made power banks... and why reinvent the wheel?
    1. Ram
      #11 Ram Guests 28 July 2020 23:42
      4
      How do you charge from a solar battery at night?
  8. )
    #12 ) Guests 9 December 2022 20:25
    0
    What happens if you use a 12 volt generator?
  9. dad
    #13 dad Guests December 20, 2023 12:28
    2
    why is this thing white on the back?