Hydraulic blade pitch positions the blade by an axis-control servovalve and hydraulic actuator with fail-safe functions
Pitch control systems from Moog Industrial Group, East Aurora, NY, monitor and adjust the inclination angle of a wind turbine’s blades to control rotor speed. Moog has both electric and electro-hydraulic, blade-pitch control along with power and data-transmission equipment for the wind-energy market.
“Wind-turbine OEMs want enhanced efficiency, increased reliability, and the highest safety,” says Sherif El-Henaoui, European marketing manager for Moog. A few of the company’s motion-control products for wind turbines are available for electric blade-pitch control. It is done with Moog’s Pitchmaster Servocontroller and electric servoactuator.
Rotor monitoring, by a fiber-optic remote monitoring system, allows for higher uptime through proactive, preventative maintenance.
Power and data transmission, using long-lasting fiber-brush slip rings, ensures high performance. The slip ring transfers electric current and signals between equipment in the hub and nacelle.
The common problme in the designation is how to connect with the rotating part, however, the most important function of slip rings is to make sure facilities freely connected when rotating
more information:http://www.moflon.com