FINITE ELEMENT ANALYSIS of FAULTS in a PERMANENT MAGNET SYNCHRONOUS MACHINE with Altair Flux
Author: Virgiliu FIRETEANU
Please find the report as a pdf attached.
This research report contains results of the investigation of a Permanent Magnet Synchronous (PMS) machine through Finite Element models. The Flux2D software from Altair Engineering was used. The increase of the interest for PMS machines in the electrical vehicles drive and of the PMS generators in the wind based production of the green electrical energy sistems, was the motivation for the choice of such an electrical machine. However, similar investigations, with the same investigation goals, can be performed for any type of electrical machine.
The investigation refers to the evaluation of the influence of a number of faults on the performances of the studied Permanent Magnet Synchronous Motor (PMSM) and to the noninvasive diagnosis and monitoring of faults evolution through the electromagnetic field, respectively with coil sensors, in the PMSM neighboring. There are many domains, for example electrical vehicles, where the evaluation of vibrations and noices generated by the included electrical machines is very important. In this context, the research way in this document, based on finite element step by step in time domain solution of the electromagnetic field, offers the possibility to compute harmonics of any local or global quantities.
The diagnosis of a number of faults and their evolution during the PMSM lifetime is based on the Mean values, or/and the Rms values, or/and the Amplitude of Harmonics in the time variation of the electromagnetic torque, of the stator current, of the unbalanced rotor force and of the coil sensors voltages. The research refers to two short-circuit faults in the stator winding of the studied PMSM, to a fault consisting in the decrease of the remanent magnetic flux density of the one of the four permanent magnets and to two types of the eccentricity
fault.
