Bucket wind generator. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Bucket wind generator. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Alternative energy sources

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This small rotary-type windmill, made at home from improvised means, of course, cannot ensure the operation of electrical appliances in the cottage. However, he is quite capable of simple tasks when a small amount of energy is required. For example, to illuminate courtyard buildings or a plot in the evening.

You will need:

Automobile alternator 12 V;
12 V battery (any - acid or helium, it can even be practically non-working);
A metal bucket of paint, varnish, or an old BIG pot (made of aluminum or stainless steel);
Automotive battery charging relay;
Charge control lamp relay (automobile);
PG switch (semi-hermetic), 12 V button;
Voltmeter (from any old measuring device or ready-made car);
Large external dose (communication box);
Wires with a cross section of at least 2,5 mm2, preferably 4 mm2;
4 MB bolts with nuts, washers, grovers;
2 large clamps or stainless wire (for attaching the generator to the mast);
Tool: drill with drills, screwdriver, keys, wire cutters, etc.

Wind turbine power: 1 kW.

Rotor

First, we make the rotor and remake the generator pulley. So, we take a bucket and divide it into four equal parts, using a tape measure and a marker (pencil), mark the places of the blades, as shown in Fig. 1, and carefully cut them out with scissors for metal, having previously drilled holes for inserting scissors.

If cutting is done with a turbine (grinder), then this must be done very carefully so as not to overheat the metal (this, of course, is impossible if the bucket is made of galvanized steel or painted tin).

Order of work

The bucket will be attached to the generator with four bolts (to the bottom and the pulley), so we SYMMETRICLY mark the places for the holes for the Mb bolts on the pulley and at the bottom of the bucket. This is done in order to avoid unbalance during rotation. Now it remains to take 10 steps - and the homemade wind generator is ready. Here are the steps:

We bend the blades on the bucket (it is necessary to take into account the direction of rotation of the generator, in most cases it rotates clockwise), but not very steeply to avoid hurricane gusts.
We fasten the bucket to the pulley with bolts.
We connect the wires to the generator (do not forget to rewrite the marking of the contacts and the colors of the wires).
We collect the chain.
We fix the generator to the mast.
We fix the wires to the generator and the mast.
We connect the generator to the circuit.
We connect the battery to the circuit with 4 mm2 wires (no more than 1 m long).
Connect the load wire cross-section up to 2,5 mm2 (lighting, electrical appliances).
Additionally, it is possible to supply a converter (inverter) 12 - 220V for 700 - 1500 watts (by connecting it to pins 7, 8 with a 4 mm3 wire no more than 1 m long).

Bucket wind generator

Finally, your windmill is ready. The rotation speed can be set by the angle of the blades.

Windmill at work

On such a windmill (with a 1000 W inverter and a 75 A battery), street lighting can operate on "low-calorie" (energy-saving) lamps of 11-15 W each (automatic through a photocell), additional charging of a car battery, heating ("Good Heat") and lighting shed and chicken coop, emergency lighting of the house on LEDs and the same lamps, burglar alarm and video surveillance, TV and personal computer. True, for this you will have to make a separate group when installing the wiring at home.

Advantages and disadvantages

The two main advantages of such a mini-windmill are obvious - quick assembly and economy. For its manufacture, masts and vane-type blades are not needed. In addition, during its operation there is no ultrasonic vibration, as from a fan. This device works quite quietly. In general, the windmill is unpretentious in maintenance, it is easy to repair it if necessary.

The only drawback is that a small windmill is not able to withstand gusts of hurricane wind (it can break the bucket, but it is easy to replace). At the same time, it must be remembered that this is a low-power device, and when a powerful load (> 1 kW) is connected, it stops (in this case, a gearbox and a larger rotor are needed).

(click to enlarge)

Wind turbine design: 1 - resistor; 2 - generator starter winding; 3 - generator rotor; 4 - voltage regulator; 5 - reverse current relay; 6 - ammeter; 7 - battery; 8 - fuse; 9 - switch.

See other articles Section Alternative energy sources.

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