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Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations

Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations
Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations
The paper develops an efficient computational method for establishing equivalent characteristics of magnetic joints of transformer cores, with special emphasis on step-lap design. By introducing an equivalent material, the method allows the real three-dimensional structure of the laminated thin sheets to be treated computationally as a two-dimensional problem and enables comparative analysis of designs. The characteristics of the equivalent material are established by minimizing the magnetic energy of the system. To verify the proposed approach, a series of experiments have been conducted. First, the anisotropic characteristics of the step-lap were established, and then space components of the flux density at specified positions measured. This enabled detailed analysis of the flux distribution in the step-lap region, in particular the way in which the flux travels between the laminations close to the air-gap steps. Encouraging correlation between the homogenized 2-D model and experiment has been observed.
Anisotropic laminations, equivalent magnetic characteristics, magnetic measurements, step-lap joints.
0018-9464
244-251
Hihat, N.
9e023c92-45d2-4d5a-8bea-492609864ba9
Napieralska-Juszczak, E.
48ca045c-51a2-4c98-a82e-ea2bbe212cee
Lecointe, J-P.
b4da6160-f416-45f1-9577-214447026d96
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Komeza, K.
6f1f9250-9675-405c-af79-c6c929dfdfbe
Hihat, N.
9e023c92-45d2-4d5a-8bea-492609864ba9
Napieralska-Juszczak, E.
48ca045c-51a2-4c98-a82e-ea2bbe212cee
Lecointe, J-P.
b4da6160-f416-45f1-9577-214447026d96
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Komeza, K.
6f1f9250-9675-405c-af79-c6c929dfdfbe

Hihat, N., Napieralska-Juszczak, E., Lecointe, J-P., Sykulski, J.K. and Komeza, K. (2011) Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations. IEEE Transactions on Magnetics, 47 (1), 244-251.

Record type: Article

Abstract

The paper develops an efficient computational method for establishing equivalent characteristics of magnetic joints of transformer cores, with special emphasis on step-lap design. By introducing an equivalent material, the method allows the real three-dimensional structure of the laminated thin sheets to be treated computationally as a two-dimensional problem and enables comparative analysis of designs. The characteristics of the equivalent material are established by minimizing the magnetic energy of the system. To verify the proposed approach, a series of experiments have been conducted. First, the anisotropic characteristics of the step-lap were established, and then space components of the flux density at specified positions measured. This enabled detailed analysis of the flux distribution in the step-lap region, in particular the way in which the flux travels between the laminations close to the air-gap steps. Encouraging correlation between the homogenized 2-D model and experiment has been observed.

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IEEEvol47no1Jan2011page244.pdf - Version of Record
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More information

Published date: January 2011
Additional Information: Digital Object Identifier 10.1109/TMAG.2010.2089800
Keywords: Anisotropic laminations, equivalent magnetic characteristics, magnetic measurements, step-lap joints.
Organisations: EEE

Identifiers

Local EPrints ID: 272099
URI: http://eprints.soton.ac.uk/id/eprint/272099
ISSN: 0018-9464
PURE UUID: 76297448-56e1-4111-a3e9-d9a78592029d
ORCID for J.K. Sykulski: ORCID iD orcid.org/0000-0001-6392-126X

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Date deposited: 14 Mar 2011 14:44
Last modified: 07 Oct 2020 02:31

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Contributors

Author: N. Hihat
Author: E. Napieralska-Juszczak
Author: J-P. Lecointe
Author: J.K. Sykulski ORCID iD
Author: K. Komeza

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