Generators are usually classified in the following three ways:
1. Classified according to the method of converted electric energy
According to the method of converted electric energy, they can be divided into alternating current generators and direct current generators. There are two categories of machines.
Alternator is divided into two types: synchronous generator and asynchronous generator. Synchronous generators are divided into two types: hidden pole synchronous generators and salient pole synchronous generators. Synchronous generators are most commonly used in modern power stations, and asynchronous generators are rarely used.
AC generator sets can be divided into two types: single-phase generators and three-phase generators. The output voltage of the three-phase generator is 380V, and the output voltage of the single-phase generator is 220V.
2. Classification according to excitation method
According to the excitation method, it can be divided into brush excitation generator and non-excitation generator. There are two types of brush excitation generators
The excitation mode of brush excitation generators is separately excited, while the excitation mode of brushless excitation generators is self-excited. The rectifier device of the separately excited generator is on the stator of the generator, while the rectifier device of the self-excited generator is on the rotor of the generator set.
3. Classification by driving power
There are many forms of generator driving power. Common power machines include:
(1) Wind turbine< /p>
Wind turbines rely on wind power to drive the generator to rotate and generate current; this generator does not consume additional energy and is a pollution-free generator;
(2) Hydropower generation Machine
Hydraulic generator uses the drop of water flow to generate power to drive a generator to generate electricity. It is also a device that uses green natural resources to generate electricity. It is also called a hydroelectric generator
(3) Fuel generator
Fuel generator relies on the combustion of diesel or gasoline to generate power to drive the generator set. Using a small fuel generator can play an emergency role. In the event of a power outage, the fuel generator can be started to generate electricity to maintain normal work.
What are the commonly used types of generators?
A generator set mainly refers to a device that converts mechanical energy into electrical energy. It is an indispensable energy device in human life.
1. According to the fuel, it is divided into: fuel generator set, gas generator set and steam turbine generator set
1. Fuel generator set is mainly divided into: diesel generator set, gasoline generator set, Heavy oil generating sets, etc.;
2. Gas-fired generating sets are mainly divided into: natural gas generating sets, biogas generating sets, gas generating sets, etc.;
3. Steam turbine generating sets are mainly divided into: : Condensing steam turbine unit, heating steam turbine unit, back pressure steam turbine unit, etc.
2. According to the brand, it is mainly divided into: domestic unit brands and imported unit brands.
1. The well-known domestic unit brands are: Weichai Power, Cooltech Power, and Baidu Generator. , Tellhow Technology, CNPC Jichai, etc.;
2. The well-known brands of imported units include: Wilson, Caterpillar, Kohler, Waukesha, Siemens, etc.
3.According to the structure, they are mainly divided into: fixed generator sets and mobile generator sets
1. Fixed generator sets are mainly divided into: open-frame units, rain-proof units, silent units, container-type units, etc.
2. Mobile generator sets are mainly divided into: hand-push units, trailer-type units, lighthouse-type units, vehicle-mounted units, etc.
How many types of generators are there?
DC generators, alternators, AC-DC generators, generator sets, etc.; Daze Power has gasoline generator sets, diesel generator sets, silent gasoline generator sets, silent diesel generator sets, AC Generator sets, DC generator sets, etc., search for details about Daze Power Sun Weiwen
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Generator Classifications include:
Generators are divided into: DC generators and alternating current generators; AC generators are divided into: synchronous generators and asynchronous generators (rarely used); alternating current generators can also be divided into single-phase generators. machine and three-phase generator.
There are many types of generators. In principle, they are divided into synchronous generators, asynchronous generators, single-phase generators, and three-phase generators.
In terms of production methods, they are divided into steam turbine generators, hydraulic generators, diesel generators, gasoline generators, etc. In terms of energy, it is divided into thermal generators, hydraulic generators, etc.
Extended information:
Characteristics of generator:
1. Working characteristics:
The performance of synchronous generators is mainly characterized by no-load characteristics and load operating characteristics. These characteristics are an important basis for users to choose generators.
2. No-load characteristics:
When the generator is not connected to a load, the armature current is zero, which is called no-load operation. At this time, the three-phase winding of the motor stator only has the no-load electromotive force E0 (three-phase symmetry) induced by the excitation current If, and its size increases with the increase of If. However, due to the saturation phenomenon in the motor magnetic circuit core, the two are not proportional. 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, which is called the armature reaction magnetic field. Its speed is exactly equal to the speed of the rotor, and the two rotate synchronously.
Both the armature reaction magnetic field and the rotor excitation magnetic field of the synchronous generator can be approximately considered to be distributed according to the 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 magnetic field is also related to the load condition.
When the load of the generator is inductive, the armature reaction magnetic field acts as a demagnetizer, which will cause the voltage of the generator to decrease; when the load is capacitive, the armature reaction magnetic field acts as a magnetizer. This will increase the output voltage of the generator.
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