Date of Award

Fall 2007

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Electrical and Computer Engineering

First Advisor

Mirafzal, Behrooz

Second Advisor

Demerdash, Nabeel A.O.

Third Advisor

Johnson, Michael T.


In this thesis, a condition monitoring vector (CMV) technique for poly-phase induction motor stator inter-tum short-circuit faults is presented. To be more specific, the CMV includes the swing angle, the negative sequence component of motor terminal currents and voltages, as well as the input power of the induction motor. The effectiveness of the CMV is illustrated for the inter-tum short circuit diagnostics using the Time Step Finite Element (TSFE) method, as well as experimental test results of a 5-hp, 6-pole, 460-Volts, 60-Hz induction motor. Furthermore, the momentum (speed) of swing angle variation is introduced for demonstrating the deterioration process of the stator winding when the motor starts to diverge from the healthy situation to a severe faulty condition. Moreover, the Time-Averaging method is applied to improve the robustness of the condition monitoring vector concept.



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