Our company produce and sell the middle and small type wind generators including 2kw to 30kw which could Variable Pitch

How to Variable Pitch in different wind speed by wind turbine1.Under the wind speed of 0m/s ~ 3m/s, the turbine blade remain static ,and the start-angle formed between the blade and turbine plane;The blade angle will under a start-angle,the blade is most easily to be started up. 2.As long as the wind speed reached 3m/s, the blades will begin to rotate, during the rotation, the outermost edge of the blade will be driven by the centrifugal force generated by the rotation of the blade to tilt toward the turbine plane, the blade angle will decrease until 0° when the blade is in parallel with the turbine plane; at this angle ,the turbine has nearly reached its rated output power. 3.When the wind speed is between 12m/s ~25m/s ,the blade will keep adjusting its position forth and backward slightly to let the angle  fluctuate a little bit but maintain at around 0°roughly, so as to stabilize its rated power. 4.Within the wind speed of 25m/s ~ 50m/s ,when the wind has exceeded its rated speed , the wind will keep drawing the blade by the centrifugal force,so the blade angle will continue to decrease and turn into a negative angle ,under this negative angle, the rotation of blade will produce a resistance on the rotation of turbine blade to slow down the rotation and protect the wind turbine from over speed operation, the maximum RPM of the turbine will be no more than 140 RPM.

HUAYING Wind Power Generator Product Feature:

1. Down wind tail-less configuration contribute to a streamlined shape

2. Speed regulation of passive blade pitch for the enhanced stability under strong wind

3. Positive blade pitch for a soft braking

4. Optimized start up blade angle endow the turbine with excellent efficiency in the breeze

5. Automatic (manual) shut down & start up function

6. Permanent magnet & direct driven motor with maintenance free design

7. Enclosed slip ring functions well to prevent the inter-entangling of cable

8. The blade profile ha been aerodynamically optimized based on the national wind tunnel test

9. The all round anti-corrosion method protects the turbine from the atmospheric, salt spray

    and aeolian erosion.

10. CE tested and certified

11. On-grid, off-grid, network power supply system plan on an individual project basis

12. Multiple tower types catering for different customer demand.

HY-30KW Wind Turbine Output Power Table (Power VS Wind Speed)

Wind speed(m/s)		0		1		2		3	4	5	6			7		8	9
Output power(KW)		0		0		0		0	0.4	1.46	3.06			4.88		7.6	10.87
Wind speed(m/s)	10				11		12	13	14	15	16		17		18		19
Output power(KW)	14.98				20.5		30	31.6	32	32	32		32		32		32
Wind speed(m/s)			20		21	22		23	24	25
Output power(KW)			32		32	32		32	32	32

HY-30KW Variable Pitch Wind Turbine CE,RoHS