Commercial generators. One of the most important uses of generators is the production of large amounts of electrical energy for use in industry and homes. The two most common energy sources used in operating AC generators are water and steam. Both of these energy sources have the ability to drive generators at the very high speeds at which they operate most efficiently, usually no less than 1,500 revolutions per minute.
In order to generate hydroelectric (water) power, a turbine is needed. A turbine consists of a large central shaft on which are mounted a series of fanlike vanes. As moving water strikes the vanes, it causes the central shaft to rotate. If the central shaft is then attached to a very large magnet, it causes the magnet to rotate around a central armature, generating electricity.
Steam power is commonly used to run electrical generating plants. Coal, oil, or natural gas is burned—or the energy from a nuclear reactor is harnessed—to boil water to create steam. The steam is then used to drive a turbine which, in turn, spins a generator.
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