Variable pitch control device for wind generating set

The utility model relates to a variable pitch control device for a wind generating set, and belongs to the technical field of variable pitch control for a wind generating set. The device comprises a pitch controller and three variable pitch control units, wherein each variable pitch control unit is provided with three servo controllers, a driving motor, a blade actuating mechanism, a pitch angle position sensor and a power supply module; and the pitch controller and the three servo controllers are communicated through industrial real-time Ethernet. The pitch controller and the variable pitch control units are communicated through Ethernet POWERLINK industrial real-time Ethernet, and the Ethernet POWERLINK is based on 100 Mbps standard quick Ethernet, and can satisfy the actual real-time requirement, distribute the send license by a basically isochronal time slot, thereby preventing the data collision in the internet scientifically. The fastest network cycle time supported by the Ethernet POWERLINK is 400 Mus, which can be synchronous with the servo-driven period.