Patent ID: 11898932
Assignee: ZHUZHOU CRRC TIMES ELECTRIC CO. LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The device for diagnosing a fault in a bearing of a motor according to claim 1, wherein in a case that the device operates in a fault model training mode,
the current signal acquisition unit is configured to acquire a plurality of history current signals of the motor in different fault states of the bearing, as a training sample data set for the bearing fault diagnosis model;
the residual signal acquisition unit is configured to, for each of the plurality of history current signals of the motor in the training sample data set acquired by the current signal acquisition unit, extract harmonic signals from the history current signal of the motor, and remove a fundamental signal and a harmonic signal from the history current signal of the motor, to acquire a residual signal;
the fault feature extraction unit is configured to analyze the residual signal acquired by the residual signal acquisition unit in both time domain and frequency domain, to extract a fault feature index of the bearing; and
the fault diagnosis model unit is configured to perform training based on the fault feature index of the bearing extracted by the fault feature extraction unit and fault types of the bearing, to acquire the bearing fault diagnosis model.