Wind turbine wind energy is converted into mechanical power of the power machinery, also known as the windmill. Broadly speaking, it is a heat source to the sun as to the atmosphere for the use of medium heat engine.

Many of the past century, wind power generators with hydraulic machinery, as an alternative power source for human, animal, for the development of productive forces played an important role. Modern electrical and mechanical power and the extensive application of the 20th century the Middle East oilfields in the 1950s found that the wind turbine to slow down the development.

The early 1970s, because of the "oil crisis", has the problem of energy shortage, it was recognized that conventional fossil energy supply instability and limited, and therefore seek clean and renewable energy sources has become the modern world an important subject. Wind energy as a renewable, non-polluting natural energy have once again aroused the attention.

Mechanical power transmission connection with the horizontal axis through the fan blades and high-speed gear box flexible shaft coupling connected with the Almighty, will transfer torque to the drive shaft generators, this coupling should be a very good shock absorption and damping characteristics , To absorb adequate performance radial, axial and a certain point of the migration, and coupling of mechanical devices to prevent overload. Another straight drive for the non-fan blades through the gear box directly connected with the electrical blower motor type

According to the propeller-fan stall moments and VSCF change paddle fan moment the characteristics of the current installed capacity of the domestic motor generally divided into two types:

Asynchronous -

(1) cage asynchronous generator power for the 600/125 kW 750kW 800kW 12500kW

Stator different power transmission grid to the 50 Hz AC;

(2) Wound-double-fed asynchronous generator power for the 1500 kW

Stator to 50 Hz AC power grid transmission, rotor control by the frequency converter to the power grid meritorious or indirect transfer of reactive power.

Synchronized

(1) permanent magnet synchronous generator power for the 750 kW 1200kW 1500kW magnetic field generated by the permanent magnet, the full power output stator Rectifier inverter to the power grid after the 50 Hz alternating current transmission

(2), synchronous generator; received by the rotor of the DC current generated magnetic field, the stator output by the full power inverter after the rectifier 50 Hz AC transmission grid


According to different forms of leaves, the existing wind turbine is divided into two categories:

Horizontal axis

At present most of the world in the form of the largest power around 5 MW.


New vertical shaft

Beginning of the 21st century from China, Japan, Europe almost simultaneously invented a new type of  wind  generators, unlike the first vertical axis wind turbines (up to Lie-type), efficiency higher than the horizontal axis wind turbines, noise-free and to Institutions, simple maintenance. Europe and the United States has become the market of choice for small and medium-sized wind generators. The world's largest power by the Shanghai-Andean Electronic Equipment Co., Ltd. (MUCE) production of 50 kilowatts vertical axis wind turbines, Japan's largest power of 30 kilowatts, Britain and the United States in the production of one kilowatt power to 10 kilowatts between.

Recently, a number of companies at home and abroad by the construction of very large vertical axis wind turbine project (10 MW), the plan is implemented, due to cost far lower than the current wind power generators, will gradually replace the horizontal axis wind turbines And become the main force in the world's new energy!