Invention Grant
- Patent Title: Electrical pitch control system and a method for operating at least one rotor blade and use of the system for performing the method
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Application No.: US16076796Application Date: 2017-03-14
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Publication No.: US11085416B2Publication Date: 2021-08-10
- Inventor: Jesper Thomsen
- Applicant: DEIF A/S
- Applicant Address: DK Outrup
- Assignee: DEIF A/S
- Current Assignee: DEIF A/S
- Current Assignee Address: DK Outrup
- Agency: Melcher Patent Law PLLC
- Agent Jeffrey S. Melcher
- Priority: DKPA201600163 20160316
- International Application: PCT/EP2017/055949 WO 20170314
- International Announcement: WO2017/157912 WO 20170921
- Main IPC: F03D7/02
- 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.
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