Novel prediction system and method for asynchronous motor stator inter-turn short circuit fault

The invention discloses a novel prediction system and method for an asynchronous motor stator inter-turn short circuit fault. The method comprises the following steps that: 1: carrying out 3s/2s coordinate transformation on the measurement signals of two-phase line voltage UAB and UBC and two-phase current IA and IB to obtain Usd, Usq, Isd and Isq; 2: through a flux estimation module, obtaining a stator flux or a rotor flux under a two-phase static coordinate system so as to carry out calculation to obtain calculation torque Te; 3: through revolving feedback, using a sum external torque calculation module to obtain sum external torque Ta; and 4: subtracting the calculation torque from the sum external torque, carrying out filtering on the calculation torque through a band-pass filter to obtain a second harmonic ripple waveform in the calculation torque, meanwhile, obtaining an effective value of the calculation torque, and when the effective value exceeds a set decision threshold value, considering that a thr