The 3rd International Conference on Applied Automation and Industrial Diagnostics (ICAAID), Elazığ, Turkey, 25 - 27 September 2019, pp.1-5
In this paper, leakage flux is monitored when
induction motors expose to non-adjacent broken rotor bars fault.
The detection of rotor faults based on stator current analysis may
sometimes become challenging if the corresponding broken bar
positions are in half and full pole-pitch. In such cases,
electromagnetic distribution can be keep symmetrical due to
induced magnetic field by corresponding broken bar positions.
This leads to reduce diagnostics ability for rotor bar fault. In order
to minimize the such problems, leakage flux is examined using
finite element analysis (FEA) in induction motors. Comparative
results for stator current and leakage flux are presented to show
the diagnostics ability and advantages of leakage flux based
analysis. The 2D-FEA results show that some characteristics
signatures such as 3sfs and fr+sfs in leakage flux are more reliable
signatures to detect broken rotor bar fault even the positions of
broken bars are in half-and full pole pitch distance.