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B. Boualem, F. Piriou
Modelling of Induction Motor Accounting for Skewed Slots Effects, ICEM 94
H Kometani
3D electro‐magnetic analyses of a cage induction motor with rotor skew”, IEEE Trans. on Energy Conversion
J. Roger‐Folch, V. Lázaro
Contribution to the transient analysis of induction motors solving the electrodynamc equations by using the finite element method
S. Williamson, T. Flack, A. Volschenk (1994)
Representation of skew in time-stepped two-dimensional finite-element models of electrical machinesProceedings of 1994 IEEE Industry Applications Society Annual Meeting, 1
J. Roger‐Folch, V. Lázaro
A study of the reswitching transient and the starting‐up in induction machines by using the finite element method
J. Roger-Folch (1995)
10.1108/eb051921COMPEL, 14
S Williamson
IEEE Trans. on Industry Applications
H. Kometani, S. Sakabe, K. Nakanishi (1996)
3-D electro-magnetic analyses of a cage induction motor with rotor skewIEEE Transactions on Energy Conversion, 11
Electrical machine slots cause an undesirable effect on the m.m.f. wave in the airgap. This effect consists of the occurrence of high frequency harmonics. When the rotor turns, the movement of rotor slots in relation to the stator slots produces cycle variations in the magnetic circuit reluctance. This effect results in high frequency harmonics in the current wave spectrum. Simultaneously high frequency harmonics torques appear. These are known as slot harmonics. To avoid slot harmonics, both in the rotor and in the stator slots, the slots are skewed. When this technique is used, the simplified hypothesis of the finite element model (FEM) in 2D cannot be employed, as it is based on the concept that the magnetic field possesses translational symmetry along the machine shaft. In this paper a method for analysing electrical machines with skewed slots is presented without using the 3D analysis.
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering – Emerald Publishing
Published: Apr 1, 1998
Keywords: Electromagnetics; Induction motor
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