| Abstract |
This paper deals with the use of the synchronous reference frame current Park’s Vector Approach in
the diagnosis of rotor cage faults in three-phase induction motors, under the presence of time-varying
loads. An analytical study, based on the d-q model of the induction motor is presented, showing how
the occurrence of abrupt changes in the motor load torque affect quantities like the d-q axis
components and the spectrum of the motor supply current, among others, emphasizing its
implications in the diagnosis of rotor faults in operating three-phase induction motors. Several
simulated and experimental results have shown that the current spectral components produced by the
occurrence of rotor faults can easily be indistinguishable from the ones introduced by time-varying
loads. On the other hand, the synchronous reference frame current Park’s Vector representation allow
us to dissociate the effects produced by the presence of rotor faults from the ones originated by the
mechanical load of the motor, thus allowing the diagnosis of rotor faults in a motor coupled to any
kind of mechanical load. |
