To put it simply, it is about improving the wind energy conversion efficiency of the fan. Theoretically, the fewer fan blades, the higher the speed at power rate, taking into account center of gravity stability requirements. , the three blades are the most practical in current practice.
Nowadays, new energy is one of the hottest topics. It can be said that the eyes of the whole world are paying attention to environmental protection issues related to new energy or development. new energy.
New energy is a type of energy that can be continuously regenerated and will not affect our ecological environment, such as wind energy.
Wind energy is a goal that the whole world is paying attention to, and wind turbines are an example of extreme use of wind energy.
Maybe speaking of this,many friends may not know what a wind turbine is. In fact, it's easy to understand. For example, we usually see wind turbines on flat surfaces. These three-leaf wind turbines located in open areas are a type of wind turbine.
The principle of the generator is also very simple. It is about converting the wind energy that nature brings us into a kind of mechanical energy, and then through some technical problems, the mechanical energy is converted into With kinetic energy, we will have inexhaustible electrical energy .
So why do we make these windmills with three leaves instead of four leaves? If it has four leaves, the surface area of our wind turbine will become larger, so we will produce more electricity.
The largest wind turbine currently in the world has a blade length of approximately 164 m and each power generation blade reaches 32 tons.
For us at GJ, the cost is too huge and there is no way to popularize it everywhere. At the same time, as the number of sheets increases and the cost increases. increases, In fact, electricity has not increased much.
In terms of cost/performance ratio, the three-blade wind turbine is more suitable. So, after considering all the factors, we decided to use a three-blade wind turbine. It can be said to be the best design.
The classification of generators includes:
Generators are divided into: direct current generators and alternators; AC generators are divided into: synchronous generators and asynchronous generators (rarely adopted); can also be divided into single-phase generator and three-phase generator.
There are many types of generators. In principle, they are divided into synchronous generators, asynchronous generators, m generatorssingle-phase 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:
Features of generators:
1 . Operating characteristics:
Representing synchronization The main performances of the generator are the no-load characteristics and the 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 motor stator winding only has no-load electromotive forceE0 (three-phase symmetry) induced by the excitation current If, and its size increases with the increase in 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 armature reaction magnetic field and the excitation magnetic field of the synchronous generator rotor can be approximately considered to be distributed according to the sinusoidal law. The difference in spatial phase between them dependsd of the time phase difference between the no-load electromotive force E0 and the armature current I. The armature reaction magnetic field is also linked 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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