Wind Energy Conversion Systems Classification
Types of Wind Turbines
Typical WECS components
Turbine Blade – an Air Foil
Wind Energy Conversion Systems
Squirrel-Cage Induction Generator
Doubly-fed Induction Generator (DFIG)
Vertical Axis Wind Turbines
Horizontal Axis Wind Turbines
Number of Rotating Blades
WECS Type A

Number of Rotating Blades
Windmills have multiple blades
need to provide high starting torque to overcome weight of the pumping rod
must be able to operate at low windspeeds to provide nearly continuous water pumping
a larger area of the rotor faces the wind
Turbines with many blades operate at much lower rotational speeds – as the speed increases, the turbulence caused by one blade impacts the other blades
Most modern wind turbines have two or three blades