Mathematical model for electric and mechanical faults in an ac machine

This paper presents a new ac three-phase complete dynamical model undergoes four simultaneous faults for an ac machine. The faults considered are rotor, stator, static eccentricity and bearing faults. The electrical faults are modeled including the parameter variation of resistance and inductance, the mechanical bearing fault modifies the friction element and the eccentricity fault is modeled as a function of mutual inductance. Mapping the stator currents to d-q reference frame and using the Park%27s instantaneous space phasor and frequency analysis it is possible to isolate the simultaneous faults. Simulation and experimental results validate the proposed model. © 2009 IFAC.
This paper presents a new ac three-phase complete dynamical model undergoes four simultaneous faults for an ac machine. The faults considered are rotor, stator, static eccentricity and bearing faults. The electrical faults are modeled including the parameter variation of resistance and inductance, the mechanical bearing fault modifies the friction element and the eccentricity fault is modeled as a function of mutual inductance. Mapping the stator currents to d-q reference frame and using the Park's instantaneous space phasor and frequency analysis it is possible to isolate the simultaneous faults. Simulation and experimental results validate the proposed model. © 2009 IFAC.

AC machine; Bearing fault; Dynamical model; Electrical faults; Frequency Analysis; Friction elements; Mechanical faults; Mutual inductance; Parameter variation; Reference frame; Resistance and inductance; Simultaneous faults; Static eccentricities; Stator currents; Bearings (machine parts); Inductance; Mathematical models; Spot welding; Stators; Computer simulation

VIVO