Novel method for modelling of dynamic hysteresis
2008 (English)In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 44, no 6, 854-857 p.Article in journal (Refereed) Published
The dynamic hysteresis model for magnetic materials presented by Bertotti  uses the classical eddy current expression, where the applied field is assumed to penetrate the material homogenously. However, for this to be valid for a material exposed to a field varying with a frequency in the kilohertz range or higher, the material has to be very thin, e.g., a thin laminate, typically thinner than 0.1 mm. In this paper a novel method is presented. The idea is to combine Bertotti's model with a Cauer circuit and divide the material into a number of sections, each exhibiting different magnitude of magnetic field caused by the eddy current shielding. Furthermore, the eddy currents are modeled by "magnetic inductances" instead of the classical eddy current expression. This modelling technique yields simulation results that agree very well with measurements.
Place, publisher, year, edition, pages
2008. Vol. 44, no 6, 854-857 p.
Cauer circuit, dynamic hysteresis, eddy currents, hysteresis
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-36697DOI: 10.1109/TMAG.2007.916505ISI: 000258183400047ScopusID: 2-s2.0-44049093612OAI: oai:DiVA.org:kth-36697DiVA: diva2:431016
16th Biennial COMPUMAG Conference on Computation of Electromagnetic Fields Aachen, GERMANY, JUN 24-28, 2007
16th Biennial COMPUMAG Conference on Computation of Electromagnetic Fields Location: Aachen, GERMANY Date: JUN 24-28, 2007 2011-07-142011-07-132011-08-23Bibliographically approved