Title :
Finite-element investigation on zig-zag flux in squirrel cage induction machines
Author :
Cheaytani, Jalal ; BENABOU, Abdelkader ; Tounzi, Abdelmounaim ; Dessoude, Maxime
Author_Institution :
L2EP, Univ. of Lille 1, Villeneuve-d´Ascq, France
Abstract :
The stray load losses represent a non-negligible contribution to the total losses in electrical machines. This paper investigates a contribution to these losses in the case of a non-skewed squirrel cage induction motor, namely the zig-zag flux. The study is performed at no-load, locked-rotor and load conditions for an induction machine with different rotor slot openings, using a time stepping 3-D finite element modeling approach. The discrete Fourier transform is used to analyze the magnetic flux density waveforms in the air gap and deduce the main harmonics related to the zig-zag flux. The influence of the rotor slot opening on the zig-zag flux and core losses, in both rotor and stator, are discussed.
Keywords :
air gaps; discrete Fourier transforms; finite element analysis; magnetic flux; squirrel cage motors; stators; DFT; FEM; air gap; core losses; discrete Fourier transform; electrical machines; load conditions; locked-rotor conditions; magnetic flux density waveforms; no-load conditions; nonskewed induction motor; rotor slot openings; squirrel cage induction machines; stator; stray load losses; time stepping 3D finite element modeling approach; zig-zag flux; Harmonic analysis; Induction motors; Iron; Magnetic flux density; Magnetic hysteresis; Rotors; Stators; AC machines; discrete Fourier transforms (DFT); eddy currents; finite element method; harmonic analysis; induction motors; magnetic flux leakage; magnetic losses; stray load losses; zig-zag flux;
Conference_Titel :
Electrical Machines (ICEM), 2014 International Conference on
Conference_Location :
Berlin
DOI :
10.1109/ICELMACH.2014.6960175
