Permanent magnets, and especially neodymium, conceal a huge amount of energy. This, of course, is not a perpetual motion machine, since over time any magnet is demagnetized, but its life can be tens of years. For example, one kilogram of such "tools" is enough to provide your computer with power for life. The rest of the article discusses how to make a homemade generator using such magnets. The finished model will produce a current of 1 ampere per 12 V battery.
Parts and materials that will be needed for assembly:
- Neodymium magnets (2 * 5 mm) - 24 pcs.
- The hub from the wheel of the walk-behind tractor.
- Steel disk (diameter 105 mm, thickness 5 mm) - 2 pcs.
- Spacer sleeve (15 mm).
- Shaft.
- Epoxy resin
- Enamel wire for coils (0.5 mm).
- Plywood 8 and 4 mm.
- Bearings - 2 pcs.
Such a makeshift generator for a wind turbine of not too large sizes is very suitable. A windmill is a device quite useful in a country house or in a personal home. With it, you can save on electricity.
Assembly order
Alternating polarity magnets are glued onto the discs. 12 pcs per disk Then they are about half filled with epoxy. Thus, parts of the rotor are made, which will then be worn on the shaft.
In order to make a stator, on an improvised generator, you first need to wind 12 enamel wire coils. It can be taken, for example, from the tube of an old broken TV. Each coil should have 60 turns of wire. Then the coils need to be soldered to each other sequentially (beginning with beginning, end with end). The result is one phase.
Now plywood is used to fill the mold. A round hole is cut out in an 8 mm plywood sheet. Then do two "donuts" of different diameters. Larger in diameter (8 mm) should coincide with the hole in the first sheet (8 mm). It is inserted into this hole, and a smaller “donut” (4 mm) is superimposed on it. Along the perimeter of the larger are coils. Then all this is filled with epoxy. The next day, the lower thick plywood sheet and the smaller “bagel” are removed. The result is a beautiful transparent stator on a makeshift generator from a frozen epoxy and 12 coils inside it.
Then you need to insert the bearings into the hub, and in them - a shaft with a key. Next, the first rotor disk is put on the shaft, and then the spacer sleeve (15 mm). Then, the stator is bolted to the hub with 3 bolts, and after the second rotor disk, which should abut against the spacer sleeve. The second disk is mounted so that its magnets, opposite the magnets of the first, have different polarity.
The gaps between them and the stator can be adjusted with copper bolts and nuts, placing them on both sides of the hub. Finish assembling a makeshift permanent magnet generator by installing a wind turbine propeller on the protruding part of the shaft. He presses the nut against the rotor. To do this, use a grover. The rotor and stator can be covered from above with a visor lid. The easiest way to do it is to saw off the bottom of the pan with part of the walls.
The generator considered is not too powerful. Using this fairly simple technology, you can make a homemade generator that is perfect for a very small windmill. For more serious structures, you need a more powerful generator.