PREDICTION OF ELECTRICAL BEHAVIOR IN DETERIORATING INDUCTION-MOTORS

Methods for the prediction of electrical behavior in deteriorating ind uction machines are surveyed. Generally, these procedures require the assumption of a specific motor speed. The electrical operating paramet ers are then calculated using a model developed for this purpose. Thes e models normally allow an arbitrary number of winding deterioration p rocesses to be simulated on the stator and/or rotor. Forms of deterior ation might include high- or low-impedance leakage between phases, bet ween coils in a single phase, or between a phase and ground. In this p aper, experimental data for a three-phase, wound rotor induction motor with stator deterioration is compared with the predictions of a speci fic model of that motor. Procedures are then developed for the predict ion of deterioration trends in classes of motors. One application of s uch an analysis would be in the generation of data bases required to d esign and develop performance monitoring, deterioration detection, or deterioration classification systems for critical motor installations without the need to develop a predictive model for each motor type.