Sivakumar Nadarajan

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Fault tolerant operation of motor drives is inevitable in many safety critical applications as failures could lead to complete shutdown or degrade the performance of the whole system. Therefore, it has become important to have fault tolerant capability to support continuous operation. This paper focus on the control of a star connected fault tolerant(More)
Stator winding insulation failure has been one of the major faults in electrical machines due to the degradation of winding insulation materials. The turn-to-turn short circuit fault indicates an early stage of insulation failure. This fault produces distortion of space harmonics in the air gap magnetic field. Capturing these harmonics and reflecting their(More)
 Abstract— In this paper a hybrid modeling approach to model synchronous generator by combining the dq0 modeling with winding function approach has been proposed. The proposed hybrid approach improves accuracy and reduces complexity of the synchronous generator model for winding fault such as turnto-turn short circuit. This paper also proposes a simple(More)
Stator winding inter-turn fault is a common fault in induction machines. Although various indicators have been proposed for detection of this fault in low-voltage induction machines, no comparison has been studied and there is no guide to industrial applications towards advanced health monitoring systems where failure prognosis is installed besides(More)
In this paper, a model-based integrated framework for diagnosis and prognosis of electrical machines is proposed. Since the fault progression, compared to the dynamics of the measured terminal quantities, can be considered as a slow process, it can be approximately modeled by the step changes of certain model-based parameters, representing fault severity(More)
With the increasing demand of high reliability and safety of modern electric machines, failure prognosis becomes more and more important since it is efficient to increase reliability and reduce downtime cost. In this work, a model-based remaining useful life (RUL) prediction method is developed for induction motor with stator winding short circuit fault.(More)
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