Wind turbines emit alternating current. The working principle of the wind turbine is relatively simple, the wind turbine rotates under the action of the wind, which transforms the kinetic energy of the wind into the mechanical energy of the wind turbine shaft, and the generator rotates to generate electricity driven by the wind turbine shaft. Broadly speaking, wind energy is also solar energy, so it can also be said that the wind generator, is a kind of sun as a heat source, the atmosphere as the working medium of the thermal energy utilization generator.

Wind generator because of the wind is not stable, so its output is 13 ~ 25V variation of alternating current, must be rectified by the charger, and then charge the storage battery, so that the wind generator generated electrical energy into chemical energy. Then an inverter power supply with protection circuit is used to convert the chemical energy in the battery into 220V AC mains power in order to ensure stable use.

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Despite the variety of wind turbines, they can be summarized into two categories:

1, horizontal axis wind turbine

Horizontal axis wind turbines can be divided into two categories: lift type and drag type. The lift type wind turbine rotates quickly, and the resistance type rotates slowly. For wind power generation, most of the lift-type horizontal axis wind turbines.

Most horizontal-axis wind turbines have a wind countermeasure, which can rotate with the change of wind direction. For small wind turbines, this wind device using the rudder, while for large wind turbines, the use of wind sensing elements and servo motors composed of the transmission mechanism.

2, vertical axis wind turbine

Vertical axis wind turbine in the wind direction change without wind, in this point relative to the horizontal axis wind turbine is a major advantage, it not only simplifies the structural design, but also reduces the wind turbine to the wind when the gyroscopic force.