公开(公告)号：US11085416B2

公开(公告)日：2021-08-10

申请号：US16076796

申请日：2017-03-14

Applicant: DEIF A/S

Inventor： Jesper Thomsen

IPC: F03D7/02 ,  F03D7/04

Abstract: Pitch control system (1) for at least one rotor blade (17) for a wind turbine comprising a nacelle (16), as well as a hub (15) both place on the top of a tower (18) and at least one rotor blade (17). The system comprises at least one electrical pitch drive system (3) each drive system (3) is connected to a rotor blade (17) and an electrical pitch motor (2). The electrical pitch drive system(s) (3) is/are adapted to communicate with units comprising the motor(s) (2) for pitching the rotor blade (17) it is attached to and in accordance with inputs registered from a first sensor and a second sensor (20). Each electrical pitch drive system (3) comprises a gyroscope (22) adapted to register an angle value of the longitudinal axis of the rotor blade (17) with respect to the gravity. A processor is adapted to calculate the position of the rotor blade (17) based on said values.

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.