Direct drive type volume control variable-pitch system of wind-driven generator

Direct drive generator of a wind volume of the pitch control system, to a wind turbine pitch system Field, the solution is to reduce costs while ensuring a response speed feathering technical problems. The pitch blade system charging circuit and pump control circuit; said charging circuit comprises a hydraulic control valve, an accumulator pump motor, the pump accumulator, the accumulator reservoir, high-pressure accumulator and a fast off solenoid valves; the blade includes a servo motor pump control loop, the pitch cylinder, five bidirectional pump and check valve; said pitch cylinder is used for driving the blade pitch of the wind turbine; the servomotor bidirectional pump pitch cylinder operation control, and thus the normal pitch controlled wind power generator; required when rapid feathering the wind turbine, the charging circuit directly to each cylinder oil pitch. Pitch system provided by the present invention can be feathered fast response, low system cost.