Generators are mechanical devices that convert mechanical energy into electrical energy. They are powered by turbines, such as water turbines, steam turbines, diesel engines, or other motive machines. These devices convert the energy from water flow, air flow, fuel combustion, or nuclear fission into mechanical energy, which is then transmitted to the generator, where it is converted into electrical energy.

Generators have wide applications in industrial and agricultural production, technology, and daily life. There are many 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, in order to produce electromagnetic power and achieve the purpose of energy conversion.