on video How does a wind turbine work?



An aerogenerator, more commonly known as a "wind turbine", is used. Its operation is simple and inspired by windmills.
The machine consists of three blades (in general) carried by a hub constituting the rotor and installed at the top of a vertical mast. This assembly is fixed by a nacelle which houses a generator. An electric motor orients the rotor so that it is always facing the wind.

The blades make it possible to transform the kinetic energy of the wind (energy that a body possesses due to its movement) into mechanical energy (mechanical movement of the blades). The wind spins the blades between 10 and 25 revolutions per minute. The speed of rotation of the blades depends on their size: the larger they are, the slower they turn.

The generator converts mechanical energy into electrical energy. Most generators need to spin at high speed (1,000 to 2,000 revolutions per minute) to produce electricity. It is therefore necessary first that the mechanical energy of the blades passes through a multiplier which has the role of accelerating the movement of the slow transmission shaft, coupled to the blades, to the fast shaft coupled to the generator.

The electricity produced by the generator has a voltage of approximately 690 volts. Since it cannot be used directly, it is processed using a converter, and its voltage is increased to 20,000 volts. It is then injected into the electricity network and can be distributed to consumers.

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