Forklift asynchronous motor bearing outer ring fault diagnosis method based on stator current Hilbert demodulation

The invention discloses a forklift asynchronous motor bearing outer ring fault diagnosis method based on stator current Hilbert demodulation, and the method comprises the steps: collecting a motor stator current signal through a signal collection module, demodulating the fault motor stator current through Hilbert, carrying out the FFT spectrum analysis of a demodulated signal, and carrying out the fault diagnosis of the bearing outer ring of a forklift asynchronous motor. Meanwhile, the rotating speed of the motor is measured, bearing peripheral fault characteristic frequency collection and calculation are completed, and a calculation result is compared with known fault characteristic frequency so as to analyze and judge whether bearing outer ring faults occur or not. According to the method, a stator current square envelope signal is obtained through Hilbert demodulation, and then FFT spectrum analysis is carried out, so that the detection of the fault characteristic frequency is converted from the tradition