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

Claim 2:
3. The device for diagnosing a fault in a bearing of a motor according to claim 2, wherein the residual signal acquisition unit is configured to:
in a case that the device operates in the fault model training mode, for each of the plurality of history current signals, acquire amplitudes, initial phases and frequencies of the fundamental signal and the harmonic signal of the history current signal of the motor from the history current signal of the motor, to acquire the fundamental signal and the harmonic signal, and remove the fundamental signal and the harmonic signal from the history current signal of the motor, to acquire the residual signal; and
in the case that the device operates in the fault diagnosis mode, acquire amplitudes, initial phases and frequencies of the fundamental signal and the harmonic signal of the real-time current signal of the motor that is to be diagnosed from the real-time current signal of the motor, to acquire the fundamental signal and the harmonic signal, and remove the fundamental signal and the harmonic signal from the real-time current signal of the motor to acquire the residual signal.