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A novel model of a variable‐speed drive system, consisting of a three‐phase induction machine fed by a matrix converter (MC) including its auxiliary circuits, is proposed in this paper. The main novelty of this model lies in the combination of a MC model created in the Matlab/Simulink environment with a finite element method model of an induction machine. The combined operation of these two components...
Large induction motors contain axial air ducts in their rotor body for cooling purposes. It has been noted lately that, the presence of the rotor air ducts affects the rotating magnetic field by introducing asymmetries. Those asymmetries produce higher harmonic content in the induction motor electromagnetic variables, same like the broken bar fault. So, the diagnostic procedure of a healthy motor...
The aim of the present paper is to compare and evaluate different diagnostic means for the identification of the broken bar fault in delta connected double-cage induction motors. The work is carried out with FEM. The motors are studied at nominal load as well as under low load operation. The traditionally used diagnostic means such as: the current, torque and apparent power waveforms' spectrums are...
Broken bar faults are common in induction cage motors and can cause a variety of problems. This is the reason why there is continuous research on techniques for prompt detection. In this work a study of the influences of the broken bar fault to the electromagnetic characteristics of the induction motor is presented, using an asynchronous cage motor and FEM analysis. To this direction two models have...
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