PITCH CONTROL SYSTEM AND METHOD FOR WIND TURBINE
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United States of America Patent
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Issued Date -
Aug 2, 2012
app pub date -
Jan 20, 2012
filing date -
Jan 30, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention discloses a pitch control system for a wind turbine and a method, comprising a main controller, a secondary controller, a motor and a pitch gearbox, wherein the main controller is connected with a plurality of the secondary controllers through a communication bus; each blade corresponds to one controller and at least two motors, and one pitch gearbox is driven by each motor. The main controller is used for calculating a pitch expected value according to wind speed as well as power and rotation speed of a generator; and the motor is driven by the secondary controller according to the pitch expected value, so as to drive the pitch gearbox and hence drive the blades to vary a pitch angle.
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