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Wind turbines are power machines that convert wind energy into mechanical work, also known as windmills. Broadly speaking, it is a thermal energy utilization engine that uses the sun as a heat source and the atmosphere as its working medium. Wind power uses natural energy. Relative to diesel power generation is much better. However, if it comes to emergency use, it is still inferior to diesel generators. Wind power cannot be considered as a backup power source, but it can be used for a long time.
The principle of wind power generation is to use wind force to drive the wind turbine blades to rotate, and then to increase the speed of rotation through a speed increaser to promote generator power generation. According to the current windmill technology, approximately 3 meters per second of breeze speed (degree of breeze), can begin to generate electricity.
Wind power is forming an upsurge in the world because wind power has no fuel problem and it will not produce radiation or air pollution.
Wind power is very popular in Finland, Denmark and other countries; China is also strongly advocated in the western region. The small wind power system is very efficient, but it is not only composed of a generator head, but a small system with a certain technological content: wind generator + charger + digital inverter. Wind turbine consists of nose, swivel, tail wing and blades. Each part is very important. The function of each part is as follows: the blades are used to receive wind power and are converted into electrical energy through the head; the fins keep the blades always facing the direction of the incoming wind to obtain maximum wind energy; the swivel enables the head to rotate flexibly to achieve The function of the rear wing to adjust the direction; the rotor of the nose is a permanent magnet, and the stator winding cuts the magnetic lines to generate electrical energy.
Due to the unstable wind volume of the wind turbine, the output of the wind turbine is an alternating current of 13 to 25V, which must be rectified by the charger and then charged to the storage battery so that the electrical energy generated by the wind turbine can become chemical energy. Then use the inverter power supply with protection circuit to convert the chemical energy in the battery into AC 220V power to ensure stable use.
Mechanical connection and power transfer The horizontal axis fan blade is connected to the universal elastic coupling through the gear box and its high-speed shaft, and the torque is transmitted to the generator's transmission shaft. The coupling should have good absorption damping and vibration. The characteristics, which are expressed as the absorption of a proper amount of radial, axial and angular displacement, and the coupling can prevent the mechanical device from being overloaded. The other type is a direct-drive fan blade that is not directly connected to the motor through a gearbox.