**2. Various of the designs of wind turbines**

Wind turbines can be classified into the following types by output power


• high power wind turbines (more than 100 kW).

*The main elements of the wind turbine with a horizontal axis of rotation.*

*DOI: http://dx.doi.org/10.5772/intechopen.89255*

• Wind turbines with horizontal axis of rotation;

• Wind turbines in the vertical axis of rotation;

ent wind turbines is shown in **Figure 4**.

the correct choice of the alternator type.

**3. The main problem of wind power**

main types

**Figure 5.**

shown in **Figure 5**.

**7**

Wind power plants have many versions, but they can be divided into two

*Application of an Asynchronous Synchronous Alternator for Wind Power Plant of Low, Medium…*

The efficiency of the wind wheel of a wind turbine is defined as the ratio of the mechanical power on the shaft to the power of the wind flow. It depends on the wind speed and the design of the wind wheel. The maximum efficiency for differ-

Wind turbine is a complex technical device. It consists of many components and

The most important elements of the wind turbine are an electric alternator and an electronic control system. The efficiency of the entire wind turbine depends on

It is necessary to solve very serious problem for using windmills effectively [5–7]. The main problem of windmill's energy is the changing of the speed and the direction of wind flow. Thus, the windmill rotor rotates with a different speed and alternator gives the voltage with variable parameters of amplitude, frequency

and phase (**Figure 6**). It is impossible to use this nonstandard energy. It is

parts [2–4]. The design of the wind turbine with a horizontal axis of rotation is

**Figure 4.** *Different designs of wind wheels and their efficiency.*

*Application of an Asynchronous Synchronous Alternator for Wind Power Plant of Low, Medium… DOI: http://dx.doi.org/10.5772/intechopen.89255*

**Figure 5.** *The main elements of the wind turbine with a horizontal axis of rotation.*

• high power wind turbines (more than 100 kW).

Wind power plants have many versions, but they can be divided into two main types


The efficiency of the wind wheel of a wind turbine is defined as the ratio of the mechanical power on the shaft to the power of the wind flow. It depends on the wind speed and the design of the wind wheel. The maximum efficiency for different wind turbines is shown in **Figure 4**.

Wind turbine is a complex technical device. It consists of many components and parts [2–4]. The design of the wind turbine with a horizontal axis of rotation is shown in **Figure 5**.

The most important elements of the wind turbine are an electric alternator and an electronic control system. The efficiency of the entire wind turbine depends on the correct choice of the alternator type.
