Detection of Stator Winding Fault in Induction Motor Using Fuzzy Logic with Optimal Rules

Subject Areas : Fault diagnosis and identification

Hamid Fekri Azgomi ¹ ( MSc/ Iran University of Science and Technology (IUST), Tehran )
Javad Poshtan ² ( Associate Professor/ Iran University of Science and Technology (IUST), Tehran )

Received: 2013-01-11 Accepted : 2013-07-13 Published : 2013-06-01

Keywords: fuzzy logic, Fault Detection, induction motor, stator, Optimal Rules,

Abstract :

Induction motors are critical components in many industrial processes. Therefore, swift, precise and reliable monitoring and fault detection systems are required to prevent any further damages. The online monitoring of induction motors has been becoming increasingly important. The main difficulty in this task is the lack of an accurate analytical model to describe a faulty motor. A fuzzy logic approach may help to diagnose traction motor faults. This paper presents a simple method for the detection of stator winding faults (which make up 38% of induction motor failures) based on monitoring the line/terminal current amplitudes. In this method, fuzzy logic is used to make decisions about the stator motor condition. In fact, fuzzy logic is reminiscent of human thinking processes and natural language enabling decisions to be made based on vague information. The motor condition is described using linguistic variables. Fuzzy subsets and the corresponding membership functions describe stator current amplitudes. A knowledge base, comprising rule and data bases, is built to support the fuzzy inference. Simulation results are presented to verify the accuracy of motor’s fault detection and knowledge extraction feasibility. The preliminary results show that the proposed fuzzy approach can be used for accurate stator fault diagnosis.