Multiphase machines are often chosen due to their enhanced fault tolerance. Six-phase ones especially convenient because they may be fed by off-the-shelf three-phase converters. In particular, those with symmetrical windings offer superior postfault capabilities. On the other hand, estimation of stator resistance is important for purposes such as thermal monitoring and preserving control perfor...

This paper describes an Intelligent Bio-inspired optimization technique to minimize the square of errors in the parameters of an induction motor. The torque ripples and speed error would degrade the performance of the machine. In order to enhance the performance parameters of cage rotor type induction motor, the speed error and torque ripples should be minimized. This can be achieved by tuning ...

To analyze responses under open fault conditions in switching devices, a performance investigation and condition monitoring scheme are presented through an integrated simulation study of a permanent magnet synchronous generator (PMSG) based variablespeed grid-connected wind power system. Among various faults in power electronics components, the open fault in switching devices may arise due to t...

In many variable-torque applications of induction machines, it is desirable to operate the machine at high flux levels, thus allowing the machine to produce higher torques. This can lead to saturation of the main flux path, introducing crosscoupling effects which can severely disrupt the performance of controllers dependent on knowledge of the machine’s magnetic parameters. Stator-flux-oriented...

To avoid damaging the motor and its surrounding equipment, detecting Inter-Turn Short Circuit (ITSC) faults in Permanent Magnet Synchronous Motors (PMSMs) applied electric vehicles is a crucial task. In this paper, detection of ITSC stator winding for PMSMs carried out by means Extended KALMAN Filter (EKF) algorithm combined with Fuzzy Logic Estimator (FLE). estimate parameters, including rotor...

OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P.O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Andrej Burakov Name of the dissertation Modelling the unbalanced magnetic pull in eccentric-rotor electrical machines with parallel windings Manuscript submitted 08.06.2007 Manuscript revised 07.10.2007 Date of the defence 25.10.2007 Monograph Article dissertation (summary + original ...

Rotor and stator temperature are of concern in both shortterm machine protection and in longer term condition monitoring for large induction machines. Especially, when operating with overload cycles, it is necessary to monitor rotor bars and stator winding temperatures to make sure that the temperature remains below prescribed limits. The purpose of this paper is to present a thermal monitoring...