Abstract
In this article, we propose an analytical method to compute the eddy-current loss in nonlinear thick steel laminations (3-12 mm) by considering the return path of the eddy currents. Initially, a 2-D finite-element (FE) model is applied to segregate losses measured from toroidal material samples into hysteresis and eddy-current loss components to use them as reference. Afterward, a 2-D analytical time-domain model is proposed for the eddy currents based on the solution of the 2-D field problem. The time-domain model is then used to derive a simple frequency-domain eddy-current loss formulation for the sinusoidal flux density case with the inclusion of a skin-effect correction factor, which accounts for the nonlinearity of the material. Highly accurate results are obtained from the proposed model compared to FE reference results with a mean relative error of 5.1% in the nonlinear region.
Original language | English |
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Article number | 6301204 |
Journal | IEEE Transactions on Magnetics |
Volume | 58 |
Issue number | 9 |
Early online date | 28 Mar 2022 |
DOIs | |
Publication status | Published - Sept 2022 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Eddy currents
- Eddy-current loss
- Nonlinearity
- Skin effect
- Thick steel laminations