The Zero-Sequence Current as a Generalized Diagnostic Mean in Δ-Connected Three-Phase Induction Motors

被引:67
作者
Gyftakis, Konstantinos N. [1 ]
Kappatou, Joya C. [1 ]
机构
[1] Univ Patras, Dept Elect & Comp Engn, Lab Electromech Energy Convers, Patras 26504, Greece
关键词
Fault diagnosis; finite-element method (FEM); induction motor; zero-sequence current; ECCENTRICITY FAULT-DIAGNOSIS; SHORT CIRCUITS; BROKEN BARS; HARMONICS; DRIVE;
D O I
10.1109/TEC.2013.2292505
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In this paper, a new diagnostic mean is introduced for accurate, reliable, and effective diagnosis of faults in delta-connected induction motors. This mean is the zero-sequence stator current spectrum. The study is carried out with analytical calculations and finite-element method simulations. Most common faults are examined for a 4-kW cage induction motor. The analysis will reveal that the proposed mean is able to successfully identify the static eccentricity fault, even in induction motors which produce principal slot harmonics, the broken bar fault, the unbalanced voltage supply, and the stator interturn short-circuit. It will also be shown that through the proposed method, it is possible to distinguish the interturn short-circuit from the unbalanced voltage supply.
引用
收藏
页码:138 / 148
页数:11
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