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

Claim 3:
4. The device for diagnosing a fault in a bearing of a motor according to claim 3, wherein in the case that the device operates in the fault model training mode, the fault feature extraction unit is configured to:
acquire a minimum value (I_min) and an effective value (I_rms) of the residual signal,
acquire a fault feature frequency of the bearing, and acquire a fault feature frequency sequence of the bearing, wherein FFT transformation is performed on the residual signal to acquire a frequency spectrum of the residual signal, and acquire an amplitude of the fault feature frequency sequence of the bearing based on the frequency spectrum of the residual signal; and
acquire a maximum value (I__max), a peak-to-peak value (I__peark) and a crest factor (I__crest) of the amplitude (I_(n)) of the fault feature frequency sequence of the bearing based on the amplitude of the fault feature frequency sequence of the bearing.