Wind turbine

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Turning the generator[change | change source]

The wind turbine's blades are turned by the wind. This turns a shaft turning at about 10-20 rpm[1] with a high torque. The shaft goes into a reduction gearbox with a ratio of about 1:50, although more recent wind turbine gearboxes can have a ratio of 1:100 or more. The gearbox turns the generator at around 1000 rpm, at a low torque. The generator creates electricity. This electricity is combined with any other wind turbines that may be in the same wind farm, and this combined electricity is adjusted to match the electricity in the power grid and then the electricity is sent to the power grid.

Environmental Impact[change | change source]

Although wind turbines are a renewable source of energy and don't pollute the environment as a result of generating power, they have an environmental impact. Some people think that wind turbines create a lot of noise and look ugly. Wind turbines are placed no closer than 300 meters from residential homes. At that distance, a wind turbine is no louder than an average household air conditioner.[2]

A wind turbine with its rotor blade dismounted for maintenance; please note the car in the picture, an Opel Astra G convertible, which is there for scale.

References[change | change source]