1. The six-tube is a standardthree-phase bridge rectifier circuit.
2. When the eight-tube generator produces large current, the diode can increase the current output by about 8%. Increase the generator output power.
3. 6 high-power rectifier diodes in the nine-tube machine form a three-phase full-wave bridge rectifier circuit to power the external 3 weak load. power diodes and 3 high-power diodes The negative diode also forms a three-phase full-wave bridge rectifier circuit, which specifically powers the magnetic field of the generator, so the three small power tubes are called excitation diodes.
4. Therectifierof the eleven-tube alternator is equivalent to the rectifier of the nine-tube alternator plus twoneutral pointRectifier. Since the alternatoreleven tubes can not only increase the power of the generator but also simplify the load indicator circuit, it is widely used.
Note:First of all, the concept of generator set: generator set refers to the power generation equipment that can convert mechanical or other renewable energy into electrical energy.
Generally speaking, our common generator sets are usually driven by steam turbines, water turbines or internal combustion engines (gasoline engines, diesel engines and other generators), wind power , solar energy, biomass energy, ocean energy, etc. .
The diesel generator market is the largest, mainly due to the large capacity of diesel generators, which can operate in parallel and provide continuous power for a long time. They can also operate independentlyment, without functioning. in parallel with the regional power grid, and are not subject to the impact of power grid failure and have high reliability.
Especially when the AC power commonly used in some areas is not very reliable, using a diesel generator as a backup power supply can not only serve as a backup power supply, but can also convert some power supplies reasonably. optimization of the low voltage system. Usually larger loads are used during power outages. This is why it is widely used in engineering.
The classification of generators includes:
Generators are divided into: DC generators and AC generators are divided into: generators synchronous and asynchronous generators; generators. machine (rarely used); alternators can alsocan 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:
Characterizes the performance of synchronous generators.The main characteristics are no-load characteristics and load operating characteristics. These features provide 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 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 the two rotate synchronously.
The magnetic field ofhe armature reaction and the excitation magnetic field of the synchronous generator rotor can be approximately considered to be distributed according to the sinusoidal law. 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 magnetizer. This will increase the output voltage of the generator.
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