Electrohydraulic regenerative control system for the blade pitch control of a wind turbine

摘要

An electrohydraulic regenerative control device for a wind power unit's (W) blades (6) comprises a differential piston with double chambers and a magnetic valve. The blade adjuster has two separate 2/2 way proportional valves for two-way flow between piston and tank and a by-pass for one valve to the piston rod-side chamber.