Generators refer to the mechanical equipment that converts mechanical energy into electrical energy. It is driven by water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or atomic Nuclear fission into mechanical energy, which is transferred to the generator, and then converted into electrical energy by the generator.

Generators have a wide range of applications in industrial and agricultural production, national defense, technology, and daily life. There are many forms of generators, but their working principles are based on the laws of electromagnetic induction and electromagnetic force. Therefore, the general principle of its construction is to use appropriate magnetic and conductive materials to form a magnetic circuit and circuit for mutual electromagnetic induction, in order to generate electromagnetic power and achieve the purpose of energy conversion.

The classification of generators includes:

Generators are divided into DC generators and AC generators;

Alternators are divided into synchronous generators and asynchronous generators (rarely used);

Alternators can also be divided into single phase generators and three phase generators.

There are many types of generators. In principle, it can be divided into synchronous generators, asynchronous generators, single phase generators, and three phase generators. It can be divided into steam turbine generator, water turbine generator, Diesel generator, gasoline generator, etc. From the perspective of energy, it can be divided into thermal generators, hydroelectric generators, etc.