In its most basic definition, an electric generator is a machine that produces electricity. Generators produce almost all of the electricity used by people. They supply the electric power that runs machines in factories, provide lighting, and operate appliances in the home. There are two main types of generators - alternating-current (AC) generators (sometimes called alternators) and direct-current (DC) generators (also known as dynamos). Both types of generator work on the same principles.
How A Generator Works (Basic Principles)
A generator does not create energy - "energy cannot be created or destroyed, only changed from one form to another" (Sir Isaac Newton). A generator changes mechanical energy into electric energy. Every generator must be driven by a machine that produces mechanic energy.
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