| Abstract |
Asynchronous machines take a large place in
industrial applications. It is necessary to ensure a high quality
of the process in the whole. So, many researches deal with the
diagnosis of induction motors. One of the widespread methods is
the monitoring of the stator current. This one is named MCSA
(Motor Current Signature Analysis). This approach is based
on the two sideband current components near the frequency
fundamental line which appear in case of rotor bar defects. As
an incipient rotor fault detection is often necessary in some
sensitive processes, we propose, in this paper, an approach
using the analysis of the line-neutral voltage. It implies a star
connection of the electrical motor. We make a spectral analysis
of this voltage in case of one partial bar or one whole broken
bar. The induction motor operates under several loads. Results
of simulations and experimentations prove the efficient use of
this approach proposed. This one is quite relevant in regard of
the MCSA method. |
