The classification of generators includes:

Generators are divided into: direct current generators and alternators; alternators are divided into: synchronous generators and asynchronous generators (seldom used); alternators can also be divided into single-phase generators and three-phase generators.

There are many types of generators. From the principle of synchronous generators, asynchronous generators, single-phase generators, three-phase generators.

From the generation method is divided into steam turbine generator, water turbine generator, diesel generator, gasoline generator and so on. From the energy source is divided into thermal generators, hydroelectric generators and so on.

Extended information:

Generator Characteristics:

1, Operating Characteristics:

Synchronous generators characterize the performance of the main no-load characteristics and Load operation characteristics. These characteristics are an important basis for users to choose the generator.

2, no-load characteristics:

The generator is not connected to the load, the armature current is zero, known as no-load operation. At this time, the three-phase winding of the motor stator only excitation current If induction of no-load electromotive force E0 (three-phase symmetry), its size increases with the increase of If. However, the two are not proportional because of the motor magnetic circuit core saturation phenomenon. The curve reflecting the relationship between the no-load electromotive force E0 and the excitation current If is called the no-load characteristic of the synchronous generator.

3, armature reaction:

When the generator is connected to a symmetrical load, the three-phase current in the armature winding will produce another rotating magnetic field, called the armature reaction field. Its speed is exactly equal to that of the rotor, and the two rotate synchronously.

Synchronous generator armature reaction magnetic field and rotor excitation magnetic field can be approximated that are distributed according to sinusoidal law. The spatial phase difference between them depends on the time phase difference between the no-load electromotive force E0 and the armature current I. The armature reaction field is also dependent on the load. The armature reaction magnetic field is also related to the load condition.

When the load of the generator is inductive, the armature reactive magnetic field plays the role of demagnetization, which will lead to the voltage reduction of the generator; when the load is capacitive, the armature reactive magnetic field plays the role of helper magnetism, which will lead to the generator's output voltage increase.

Baidu Encyclopedia - Generator