Overview:
A 10 kilowatt hydroelectric generator can produce electricity in a day at full load: 10 KW x 24 hours = 240 KWh = 240 degrees, and in a day at 80% load it can produce electricity: 10 KW x 80% x 24 hours = 240 KWh. =192 degrees.
The generator is mainly composed of stator, rotor, end cover, brush, base and bearings.
The stator consists of a machine base, a stator core, a wire winding and other structural parts that secure these parts.
The rotor consists of the rotor core, rotor magnetic poles (with magnetic yoke and magnetic pole windings), slip rings (also called copper rings and slip rings), fans and rotating shafts.
The stator and rotor of the generator are connected and assembled via the bearings, base and end cover, so that therotor can rotate in the stator. Some excitation current passes through the slip ring, so that. the rotor becomes a rotating magnetic field. The stator coil moves to cut the magnetic lines of force, thereby generating an induced electrical potential, which is drawn across the terminals and connected in the circuit to generate current.
Due to a broken connection between the brush and the rotor, the rotor rotates in a certain direction and generates alternating current. Therefore, there is alternating current in household and other circuits, called. alternating current. The output current frequency of China's power grid is 50 Hz.
The classification of generators includes:
Generators are divided into: Generators DC and AC generators are divided into: synchronous generators and asynchronous generators; generators.machine (rarely used); Alternators can also be divided into single-phase generators and three-phase generators.
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.
Detailed information:
Generator specifications:
1 Operating characteristics:
The performance of synchronous generators is mainly characterized by no-load characteristics and on-load operating characteristics. These features provide an important basis for users to choose the 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 motor stator winding 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 core of the motor's magnetic circuit, 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, called the armature. reaction magnetic field. Its speed is exactly equal to the speed of the rotor and both rotate in masynchronous mode.
Armature reaction of synchronous generatorThe magnetic field and the excitation magnetic field of the rotor can be approximately considered to be distributed according to sinusoidal rules. The spatial phase difference between them depends on the temporal phase difference between the no-load electromotive force E0 and the armature current I. The armature reaction magnetic field is also related to the charge state.
When the generator load is inductive, the armature reaction magnetic field acts as a demagnetizer, which will cause the generator voltage to decrease; when the load is capacitive, the armature reaction magnetic field acts as a demagnetizer; a magnetizer. This will increase the output voltage of the generator.
Baidu Encyclopedia Generator