Monitoring and fault diagnosis of an electric machine
OwnerAndré Leppich, Markus Luft +2inventors
InventorsAndré Leppich, Markus Luft, Jürgen Rossmann, Alexander Stukenkemper
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Abstract
In a method for monitoring a rotating electric machine (1) that is fed by a converter and for diagnosing faults of said rotating electric machine, a current signature (I1, I2, I3) of output signals of the converter is recorded, the current signature (I1, I2, I3) is transformed, and the transformed current signature (A) is evaluated in at least one frequency band in order to detect damage to the machine (1).
Claims20
A method for monitoring and fault diagnosis of a rotating electric machine which is coupled with a converter, the method comprising:
- recording a current signature of output signals of the converter,
- carrying out a transformation of the current signature, and
- evaluating the transformed current signature in at least one frequency band in order to detect damage to the machine, wherein the transformation of the current signature comprises at least one fast Fourier transform using a filter function.
A system for monitoring and fault diagnosis, comprising:
- a rotating electric machine coupled with a converter,
- means for recording a current signature of output signals of the converter,
- means for carrying out a transformation of the current signature, and
- means for evaluating the transformed current signature in at least one frequency band in order to detect damage to the machine, wherein the transformation of the current signature comprises at least one fast Fourier transform using a filter function.
Dependencies are inferred from the claim text.