Computation of induction machine inductances for extended analytical modeling accounting for saturation

Issue		Eur. Phys. J. Appl. Phys. Volume 5, Number 3, March 1999


Page(s)		257 - 267
DOI		10.1051/epjap:1999138

DOI: 10.1051/epjap:1999138

Eur. Phys. J. AP 5, 257-267

Computation of induction machine inductances for extended analytical modeling accounting for saturation

B. Lemaire-Semail¹ - J.P. Louis² - F. Bouillault³

¹ L2EP, École Centrale de Lille, B.P. 48, 59651 Villeneuve d'Ascq, France
² LESiR, ENS de Cachan, 61 avenue du Président Wilson, 94235 Cachan, France
³ LGEP, ESE, plateau du Moulon, 91192 Gif-sur-Yvette, France
betty.semail@eudil.fr

Received: 15 December 1997 / Revised: 30 September 1998 / Accepted: 15 December 1998

Abstract
In this paper, finite element method is used to compute inductance parameters of a squirrel cage induction machine. To take into account saturation effect, saturated equivalent parameters are introduced, which depend on the instantaneous value of the magnetising current. For a balanced induction machine, the particular inductance behaviors allow straightforward flux expressions without any cross saturation effect. Moreover, these expressions are explained thanks to an extended analytical approach considering a magnetic saliency phenomenon by a second order air-gap permeance. A simple way of transformation ratio and leakage inductance computation is also deduced. The numerical results show the compatibility between finite element approach and extended analytical Park's method. Besides, two operating points (at no load and for nominal speed) studied by the both methods give very closed results.

PACS
07.05.Tp Computer modeling and simulation - 07.50.-e Electrical and electronic components, instruments, and techniques

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