Method for monitoring demagnetization

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United States of America Patent

PATENT NO 9823308
SERIAL NO

14066307

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Abstract

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A method for discovering demagnetisation faults of a permanent magnet synchronous generator, such as a wind power generator. The method is performed during operation of the synchronous generator and includes measuring the vibration of the stator, performing a frequency analysis of the vibration, and deducing whether the generator suffers from demagnetization of a permanent magnet, from the vibration analysis. Moreover, geometric eccentricity faults and electric short circuit faults may also be detected from the vibration.

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Patent Owner(s)

  • ABB SCHWEIZ AG;ABB TECHNOLOGY AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rodriguez, Pedro Vasteras, SE 22 227

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