An electric network is constituted by generators providing power to various
loads. The induction machine is the most common motor in the industrial
applications because of its simplicity of construction, its reliability and
its low cost. It allows the constant speed applications when it is directly
supplied by the network and variable speed ones with the use of power
converters. These speed drives induce important harmonic perturbations in
the power system and in the motor side. In this context, we are interested
by the frequential modelling of the induction machine in order to simulate
the line current with its harmonic components. In order to use the induction
machine models, it is necessary to identify their parameters and therefore
realizing specific and sufficiently informative tests. Several tests of
identification are presented in the literature; their differences and their
relevance have not been discussed. This study deals with the realization and
the comparison of several types of frequential tests (constant voltage,
constant V/f, injection of DC current) for induction machine models
identification. The comparison of the simulation results with the
experimental measurements allows electing the most representative of the
induction machine behaviour.