In pitch control, the power delivered by the rotor is regulated either by pitching the blades toward the wind to maximize energy capture or by pitching to feather to discard the excess power and ensure that the mechanical limitations are not exceeded. At rated operation, the aim is to maintain power and rotor speed at their rated value. To achieve this, the torque is held constant and the pitch is continually changed following the demands of a closed-loop rotor speed controller that optimizes energy capture and follows wind speed variations. In contrast, below rated operation there is no pitch control; the blade is set to a fine pitch position to yield higher power capture values while the generator torque itself regulates the rotor speed.