Pitch Control

We have specialised in hydraulic pitch control, and by means of this technology we believe to have the optimum solution for the two major functions in the pitch system:

• Positioning the blade in the correct position for optimum output during normal operation
• Ensuring a very simple, fast and highly reliable emergency stop function.

In addition to the precise positioning of the blade via the hydraulic cylinders, a number of benefits relates to the use of hydraulic systems:

• Full torque in all situations, regardless of blade position
• Pitch systems are not sensitive to cold climate conditions, as heat can be added to all relevant parts of the system
• Individual, fast reacting and easy to recharge power backup via emergency accumulators to each cylinder.

One major benefit of the hydraulic pitch system is the very short start-up time after an emergency stop. The wind turbine is ready to restart production after only a few minutes, when recharging of the emergency accumulators has been completed.