Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Interturn Short-Circuit Fault Diagnosis in the Stator of an Induction Motors Using the Matrix Pencil Method V.A. EREMEEVA The most common fault of an induction motor is an interturn short circuit in the stator winding. Motor diagnostic methods based on current analysis in the frequency domain have low sensitivity to interturn short circuits. This article proposes a new highly sensitive method for detecting interturn short circuit faults in motor stator windings. The sum of mutual differences in phase delays between the current and supply voltage signals is proposed as an indicator of an interturn short circuit. Phase delays are measured using the matrix pencil method (MPM), which is characterized by high accuracy and resistance to noise in the signals. The indicator is calculated on a signal section 0.05 seconds long at a sampling frequency of 2000 Hz, which allows diagnosing the motor in non-stationary operating modes. The performance of the matrix pencil method was studied using model and experimental data from a 0.25 kW motor. The proposed indicator makes it possible to unambiguously identify the serviceable and defective state of the motor at different load levels and power frequencies. Keywords: fault diagnosis, induction motor, interturn short circuit, matrix pencil method. DOI: 10.25791/pribor.5.2025.1579 Pp. 01-10.