초록 ▼

In a pitch control system for a wind turbine, a mechanical control system changes pitch angle of the rotor blades collectively in response to blade pitch moment. The control system is designed to be used with a downwind constant speed two-bladed horizontal axis teetering hub wind turbine. Pitch plac

In a pitch control system for a wind turbine, a mechanical control system changes pitch angle of the rotor blades collectively in response to blade pitch moment. The control system is designed to be used with a downwind constant speed two-bladed horizontal axis teetering hub wind turbine. Pitch placement controls torque for a synchronous alternator connected to the electrical power grid. The pitch control system is manually lockable from the ground in run or shutdown modes. An automatic shutdown mode provides fullfeathering for protection from large amplitude vibrations or loss of the electrical grid.

대표청구항 ▼

A constant speed wind turbine of the type comprising a tower-mounted free yawing carriage having vane means for aligning said carriage with the wind, a drive shaft defining a substantially horizontal rotor axis mounted for rotation in said carriage, and a wind-powered electrical generator operativel

A constant speed wind turbine of the type comprising a tower-mounted free yawing carriage having vane means for aligning said carriage with the wind, a drive shaft defining a substantially horizontal rotor axis mounted for rotation in said carriage, and a wind-powered electrical generator operatively coupled to one end of said drive shaft having electrical terminals adapted to be connected to an electrical power grid, wherein the improvement comprises a rotor with variable pitch blades drivingly coupled coaxially to the other end of said drive shaft, and mechanical control means connected between said rotor and said carriage for establishing the pitch angle of said rotor blades collectively as a direct predetermined function of the blade pitch moment.