Computation of core losses in electrical machines using improved models for laminated steel

Ionel, D.M., Popescu, M., McGilp, M.I., Miller, T.J.E., Dellinger, S.J. and Heideman, R.J. (2007) Computation of core losses in electrical machines using improved models for laminated steel. IEEE Transactions on Industry Applications, 43(6), pp. 1554-1564. (doi: 10.1109/TIA.2007.908159)

Abstract

Two new models for specific power losses in cold-rolled motor lamination steel are described together with procedures for coefficient identification from standard multifrequency Epstein or single sheet tests. The eddy-current and hysteresis loss coefficients of the improved models are dependent on induction (flux density) and/or frequency, and the errors are substantially lower than those of conventional models over a very wide range of sinusoidal excitation, from 20 Hz to 2 kHz and from 0.05 up to 2 T. The model that considers the coefficients to be variable, with the exception of the hysteresis loss power coefficient that has a constant value of 2, is superior in terms of applicability and phenomenological support. Also included are a comparative study of the material models on three samples of typical steel, mathematical formulations for the extension from the frequency to the time domain, and examples of validation from electrical machine studies.

• Item Type: Articles
• Keywords: Brushless permanent-magnet (BLPM) motor, Epstein test, cold-rolled motor lamination steel, core loss, electric machine, finite-element analysis (FEA), interior permanent-magnet (IPM) motor, iron loss.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Miller, Prof Timothy
• Authors: Ionel, D.M., Popescu, M., McGilp, M.I., Miller, T.J.E., Dellinger, S.J., and Heideman, R.J.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Research Group: SPEED
• Journal Name: IEEE Transactions on Industry Applications
• Publisher: IEEE
• ISSN: 0093-9994
• Copyright Holders: Copyright © 2007 IEEE
• First Published: First published in IEEE Transactions on Industry Applications 43(6):1554-1564
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher.