Research on Transient Behaviors and Detection Methods of Stator Winding Inter-Turn Short Circuit Fault in Induction Motors Based on Multi-Loop Mathematical Model

摘要

This paper aims to the detection of stator winding inter-turn short circuit fault (SWITSCF) in induction motors. Firstly, the multi-loop mathematical models of squirrel cage induction motor, YN, Y or D connected, under the conditions that the motor is healthy/faulty with stator winding inter-turn shorts, are developed. Secondly, the transient simulation of SWITSCF as well as the related experiment is completed. By thoroughly analyzing the simulation and experiment results, a series of interesting highlights to guarantee the sensitivity and reliability of the detection scheme for SWITSCF have been revealed explicitly. Furthermore, a novel detection method for SWITSCF, which takes the filtered value of stator negative sequence apparent impedance as the fault feature, is presented. Experiment results demonstrate that it is effective.