Abstract
The stator/rotor winding fault is the major kind of fault in induction motor systems. Incipient winding fault detection and isolation can not only improve the reliability of motors, but also avoid serious failures in the entire traction system of high-speed trains. Such that, the incipient fault detection and isolation of stator/rotor winding fault is urgently demanded. Firstly, the mathematical model of squirrel caged induction motor system is established, based on which, the incipient winding fault modeling and fault analysis are also obtained. Then, a robust observer based incipient fault detection/isolation scheme is proposed for the possible incipient winding faults. Simulation results of this paper show that the incipient fault diagnosis scheme proposed not only has high sensitivity for incipient winding faults but also can accurately isolate faulty winding, which has certain reference value in practical engineering applications.
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