A generator is a mechanical device that converts mechanical energy into electrical energy. It is driven by a turbine, steam turbine, diesel engine, or other power mechanical units, which transform the energy from water flow, air flow, fuel combustion, or nuclear fission into mechanical energy and then transfer it to the generator. The generator then converts this mechanical energy into electrical energy.

Generators are widely used in industrial and agricultural production, technology, and daily life. There are various types of generators, but their working principles are all based on the laws of electromagnetic induction and electromagnetic force. Consequently, the general principle of their construction is to use appropriate magnetic and conductive materials to form magnetic and electrical circuits that interact through electromagnetic induction, to produce electromagnetic power and achieve the goal of energy conversion.