公开(公告)号：US10767627B2

公开(公告)日：2020-09-08

申请号：US15753210

申请日：2016-09-13

Applicant: DEIF A/S

Inventor： Jesper Thomsen ,  Christian Nielsen ,  Torben Rønnow ,  Jacob Danielsen

IPC: F03D7/02 ,  F03D7/04 ,  G05B11/36 ,  H02P23/00

Abstract: 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.