Comprehensive modelling of dynamic hysteresis loops in the rolling and transverse directions for transformer laminations

Magnetic properties of grain-oriented materials are affected by hysteresis, anisotropy and dynamic effects. The attempts to describe dynamic hysteresis loops are usually limited to the rolling direction (RD). On the other hand, modelling of magnetic properties for the transverse direction (TD) is im...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2015-04, Vol.462, p.86-92
Main Authors: Baghel, A.P.S., Gupta, A., Chwastek, K., Kulkarni, S.V.
Format: Article
Language:English
Subjects:
Condensed matter
Dynamic losses
Dynamics
Grain-oriented laminations
Hysteresis loops
Jiles-atherton model
Magnetic properties
Magnetic viscosity approach
Mathematical models
Modelling
Transformers
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Summary:Magnetic properties of grain-oriented materials are affected by hysteresis, anisotropy and dynamic effects. The attempts to describe dynamic hysteresis loops are usually limited to the rolling direction (RD). On the other hand, modelling of magnetic properties for the transverse direction (TD) is important for numerical analysis of core-joints and corner regions in transformers. For this direction, hysteresis loops reveal complex shapes particularly for dynamic magnetization conditions. This paper presents a comprehensive approach for modelling of dynamic hysteresis loops in RD and TD. This work uses the magnetic viscosity-based approach, which is able to describe irregular widening of dynamic loops. The loss separation scheme is also considered for both principal directions. Variations of loss components with frequency for both directions are discussed. The computed dynamic loops in RD and TD are in a close agreement with experimental ones.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2015.01.026