Patent ID: 6809431
Filing Date: 2004-10-26
Classification: F03D,F05B,H02P,Y02E,Y02P

Abstract:
A wind energy system, comprising a wind-drivable rotor (3) with angularly adjustable rotor blades (4); a generator (8) connected directly or indirectly to the rotor (3) for generating electrical energy, wherein power output of the generator (8) is possible at variable rotor rpm; and a control system, wherein said control system regulates the rotor rpm by adjustment of the rotor blade angles (5) and turns off the operation of the system above a shutoff speed (16) within a predetermined wind speed range, wherein the control system decreases the rotor rpm and the power output by adjustment of the rotor blade angles (5) in a range between a predetermined limit speed (15) and the shutoff speed (16), wherein the limit speed (15) is substantially 16 meters per second, wherein the control system regulates the power outlet essentially to a value of a rated power of the system at wind speeds below the predetermined limit speed (15), and wherein the control system regulates the power output, beginning at the rated power, constantly and decreasingly down to the shutoff speed (16) when wind speed increases above the predetermined limit speed (15).