Design On-line Monitoring and Sensitive Fault Detection for Three Phase Induction Motor

On-line monitoring system is one of the solutions to avoid catastrophic failure in machine, including induction motor. The most common fault in induction motor is stator winding failures that initiated by inter-turn short circuit. In this paper, induction motor monitoring and fault detection system is proposed based on microcontroller which is displayed on computer monitor. Several measurement variables are displayed in on-line monitoring interface such as voltage, current, speed, and stator temperature. Moreover, the diagnostic system is developed to detect inter-turn short circuit. Based on the testing result, the proposed system is successfully to detect one-turn short circuit fault or less than one percent of stator winding.