Table of Contents
Journal of Computational Engineering
Volume 2013 (2013), Article ID 657425, 9 pages
Research Article

Application of Wedges for the Reduction of the Space and Time-Dependent Harmonic Content in Squirrel-Cage Induction Motors

The Laboratory of Electromechanical Energy Conversion, Electrical and Computer Engineering Department, University of Patras, Patras 26504, Greece

Received 30 April 2013; Revised 7 November 2013; Accepted 12 November 2013

Academic Editor: George Labeas

Copyright © 2013 Konstantinos N. Gyftakis et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The influence of the semimagnetic stator wedges of different sizes on the electromagnetic characteristics and the behavior of the induction motor is investigated. The study will be carried out with both analytical calculations and FEM analysis. The analytical calculations will take into account the stator and rotor slots, as well as the iron core saturation in order to study the spatial and time-dependent harmonic content of the air-gap magnetic flux density and electromagnetic torque. The size of the wedge plays an important role as it determines the tooth tips saturation, the high harmonic content of the air-gap magnetic flux density, and the electromagnetic characteristics of the induction motor.