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Comparison of two magnetic saturation models of induction machines and experimental validation

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Kiselychnyk, Oleh, Bodson, Marc and Wang, Jihong (2017) Comparison of two magnetic saturation models of induction machines and experimental validation. IEEE Transactions on Industrial Electronics, 64 (1). pp. 81-90. doi:10.1109/TIE.2016.2608766

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Official URL: http://dx.doi.org/10.1109/TIE.2016.2608766

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Abstract

The paper develops a systematic comparison of two nonlinear models of induction machines in magnetic saturation using stator and rotor currents as state variables. One of the models accounts for dynamic cross-saturation effects, whereas the other neglects them. Analytic derivations yield an explicit description of the difference between the models showing that differences can only be observed through transient responses in the saturated region. To refine the comparison, and exclude conditions in the linear magnetic region, the dynamics of self-excited induction generators around stable operating points is analyzed. Unexpected and interesting features of the models are revealed through their linearization in the reference frame aligned with the stator voltage vector, followed by computation of the transfer functions from perturbations to state deviations. The analysis predicts a slower exponential convergence of the simplified model compared to the full model, despite very close responses in the initial period. The comparison is validated via thorough experiments and simulations. The paper provides experimental evidence of the higher accuracy of the full model for transients deep into the saturated region. For realistic operating conditions, the difference is found to be rather minor, and often comparable to the steady-state error caused by inaccuracies in the parameters.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Electric machinery, Induction
Journal or Publication Title: IEEE Transactions on Industrial Electronics
Publisher: IEEE
ISSN: 0278-0046
Official Date: January 2017
Dates:
DateEvent
January 2017Published
13 September 2016Available
8 July 2016Accepted
Volume: 64
Number: 1
Number of Pages: 10
Page Range: pp. 81-90
DOI: 10.1109/TIE.2016.2608766
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access

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