Hydraulic Control Technology for Wind Power Drive Train Braking In uncontrolled braking processes, the torque transmitted by the gearbox can easily exceed several times the rated torque and thus cause damage to the gearwheels and bearings. Time-consuming and hence costly failure, repair and replacement are the consequence. Leading manufacturers of wind turbines therefore opt for the hydraulic modulation of braking pressure. Modulated pressure permits a wide variety of wind turbine functions: Speed-controlled braking Torque-controlled braking Position-controlled braking Gentle braking Emergency braking Position holding To support these features, Rexroth has designed an independent hydraulic unit is to control all braking systems and circuits. With the aid of on/off valves, simple braking and holding functions are performed. Rexroth servo, proportional and high-response hydraulic valves give valuable plant components maximum protection from overload and damage. All the valves are seat valves and thus enable braking pressure to be maintained for extended periods, even during power failures. Learn more about Gear Technology and Hydraulics for Wind Turbines developed by Bosch Rexroth for the wind energy industry. Back to Hydraulic Control Systems