Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2011-01-11
2011-01-11
Kundu, Sujoy K (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C702S094000, C702S127000, C702S150000, C702S152000, C702S153000, C073S001790, C700S302000
Reexamination Certificate
active
07869976
ABSTRACT:
An electric power generator system is provided with improved power efficiency due to a reduced sensitivity to errors in the sensing of angular rotor position. The system includes a power generator with a rotor, and a position encoder connected to sense angular position of the rotor and to generate a position signal accordingly. A processor receives the position signal, calculates an angular position in response, calculates an estimated angular position based on earlier received position signals, and finally generates a processed angular position based on the calculated angular position and the estimated angular position. This processed angular position is a more reliable measure of the rotor position, reducing the influence of short-term errors in the position signal, allowing normal wind turbine operation during temporary position encoder failure, and allowing an orderly shutdown during complete position encoder failure.
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EPO Examination Report, on Application No. 08171178.0-2207, dated Feb. 18, 2010. (This is a corresponding application with similar claims.).
Bendixen Flemming Buus
Larsen Kim Brøndum
Lau Mogens Lønberg
Abelman ,Frayne & Schwab
Kundu Sujoy K
Vestas Wind Systems A/S
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