Invention Grant
- Patent Title: Speed controlled pitch system
- Patent Title (中): 速度控制音调系统
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Application No.: US12016227Application Date: 2008-01-18
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Publication No.: US07956482B2Publication Date: 2011-06-07
- Inventor: Jacob Johannes Nies , Patrick Achenbach , Peter Rogall , Axel Braicks , Stefan Rieken
- Applicant: Jacob Johannes Nies , Patrick Achenbach , Peter Rogall , Axel Braicks , Stefan Rieken
- Applicant Address: US NY Schenetady
- Assignee: General Electric Company
- Current Assignee: General Electric Company
- Current Assignee Address: US NY Schenetady
- Agency: Global Patent Operation
- Agent Douglas D. Zhang
- Main IPC: F03D9/00
- IPC: F03D9/00 ; H02P9/04 ; F03B13/00 ; F03B13/10 ; F03B7/00

Abstract:
The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a controller and a first drive system for adjusting a pitch angle of the first rotor blade, wherein the drive system is adapted to transform rotational energy of the rotor blade rotating about its longitudinal axis into another form of energy such that a counter torque against the rotating direction is induced. Further, it concerns a method for controlling a pitch velocity of a rotor blade of a wind turbine, the wind turbine comprising at least one drive system for adjusting a pitch angle of said rotor blade, the drive system being adapted to operate in a active mode, wherein the drive system rotates the rotor blade, and in a passive mode, wherein the drive system exerts a counter force against the rotating direction, when the rotor blade being rotated by another force than the force of the drive system, wherein the pitch velocity is controlled by operating the drive system in said passive mode when the pitch of the rotor blade is changed from a first position to a second position.
Public/Granted literature
- US20090184519A1 SPEED CONTROLLED PITCH SYSTEM Public/Granted day:2009-07-23
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