The negative sequence impedance as fault indicator in induction motors
DOI:
https://doi.org/10.17533/udea.redin.14819Keywords:
Induction motors, stator fault diagnosis, negative sequence impedance, digital signal processing (DSP)Abstract
An algorithm to detect inter-turn faults in induction motors based on the negative sequence impedance is presented in this paper. The implementation through a digital prototype is also explained and its results are tested using a 3 Hp induction motor designed to induce inter-turn faults. It is concluded that the robustness of the algorithm can detect incipient faults from five turns, and it is a good tool for predictive maintenance of induction motors.
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MC56F8367. Preliminary Technical Data, Rev. 4.0. Freescale Semiconductor, Inc. 2005. Appendix Characteristics of the test bench Induction motor Power = 3 Hp
V = 220 Vrms, f = 60 Hz
P = 4
J = 0.04 kg.m2
N = 102 turns per each parallel way
Xs = 1.5068 Ω
Xr = 1.5068 Ω
Xm = 27.810 Ω
Rs = 0.720 Ω
Rr = 0.7817 Ω
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