œA METHOD FOR CONTROLLING A TORQUE PERFORMANCE OF AN ELECTRICAL PITCH MOTOR, AN ELECTRICAL PITCH-CONTROL SYSTEM AND USE THEREOF�

摘要

Method for control of the torque performance of an electric pitch motor (1). A control system (2) comprises a first unit (3) controlling the pitch angle of the rotor blade a second unit (7) which compares a reference speed Sr with an actual speed Sa of the motor (1) rotational speed. The second unit (7) controls the motor (1) rotational speed a third unit (10) which regulates the motor (1). The control system (2) comprises a first overload device (13) and a second overload device (14). The second overload device (14) receives an error speed signal Se which is the difference between Sr and Sa recorded by the second unit (7). The second overload unit (14) compares See with a maximum allowable speed value Smax and the second overload device (14) sends a signal to the motor (1) for the regulation of the torque performance.