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Advanced Testing and Modeling of Magnetic Materials Including a New Method of Core Loss Separation for Electrical Machines

Title:

Advanced Testing and Modeling of Magnetic Materials Including a New Method of Core Loss Separation for Electrical Machines

Ibrahim, Maged and Pillay, Pragasen (2012) Advanced Testing and Modeling of Magnetic Materials Including a New Method of Core Loss Separation for Electrical Machines. IEEE Transactions on Industry Applications, 48 (5). pp. 1507-1515. ISSN 0093-9994

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Official URL: http://dx.doi.org/10.1109/TIA.2012.2210012

Abstract

This paper presents a new method for the separation of core loss components (hysteresis and eddy current) in laminations exposed to high-frequency excitations. Accurate separation of core losses is achieved by calculating the hysteresis losses at each frequency taking into account the nonuniform flux distribution inside the lamination. The results highlight that the assumption of constant hysteresis energy loss per cycle is only valid at low frequencies, where skin effect is negligible. The developed model is then used to study the effect of the annealing process on core loss components in laminations exposed to high-frequency excitations. Core loss measurements are performed on different laminations at several frequencies in the range of 20-4000 Hz. A comparison of the separated core loss components shows that a huge reduction in the hysteresis losses is achieved by annealing, while the annealing process increases the eddy-current loss component at high frequencies and high flux densities. The results are then analyzed by comparing the separated eddy-current loss with an analytical eddy-current loss model that accounts for the nonuniform distribution of the magnetic field.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Electrical and Computer Engineering
Item Type:Article
Refereed:Yes
Authors:Ibrahim, Maged and Pillay, Pragasen
Journal or Publication:IEEE Transactions on Industry Applications
Date:2012
Digital Object Identifier (DOI):10.1109/TIA.2012.2210012
Keywords:Annealing , core loss , eddy-current loss , hysteresis loss , skin effect
ID Code:976799
Deposited By: DANIELLE DENNIE
Deposited On:25 Jan 2013 19:40
Last Modified:18 Jan 2018 17:43

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