Title :
Detection of mixed air gap eccentricity in closed-loop drive-connected induction motors
Author :
Huang, Xianghui ; Habetler, Thomas G.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
This paper focuses on the detection of mixed air gap eccentricity in closed-loop drive-connected induction motors. The influence of speed and current PI controllers on the fault detection is considered together with the load oscillation. For high detection sensitivity and accuracy, this paper points out that the monitoring of low frequency harmonics in the stator voltage and high frequency harmonics in the stator current in suitable reference frame should lie combined together. The simulation and experimental results are included to verify the feasibility of the proposed detection scheme.
Keywords :
air gaps; angular velocity control; closed loop systems; electric current control; fault diagnosis; finite element analysis; harmonic analysis; induction motor drives; machine vector control; oscillations; stators; two-term control; 460 V; 7.5 hp; 70.87 kW; FEM; closed-loop drive-connected induction motors; current PI controllers; fault detection; high detection sensitivity; high frequency harmonics; indirect field oriented control; load oscillation; low frequency harmonics; mixed air gap eccentricity detection; monitoring; speed PI controllers; stator current; stator voltage; Fault detection; Frequency; Induction motors; Monitoring; Power harmonic filters; Pulse width modulation inverters; Rotors; Stators; Torque; Voltage;
Conference_Titel :
Diagnostics for Electric Machines, Power Electronics and Drives, 2003. SDEMPED 2003. 4th IEEE International Symposium on
Print_ISBN :
0-7803-7838-5
DOI :
10.1109/DEMPED.2003.1234592
