PITCH CONTROL SYSTEM AND METHOD FOR WIND TURBINES
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United States of America Patent
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Issued Date -
May 27, 2010
app pub date -
May 4, 2007
filing date -
May 4, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention describes a pitch control system comprising a principal converter, and auxiliary converter, a direct current motor and a power storage system (accumulator) and has four different operation modes: normal, fault (first level), fault (second level) and emergency. In the case that a fault is detected, the system can move the motor in order to move the vanes to the desired position by making a controlled adjustment.
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