Mapping of magnetic properties for simulations of high-temperature electromagnetic applications

• Ville Akujärvi ^[1] ; Tord Cedell ^[1] ; Kenneth Frogner ^[1] ; Mats Andersson ^[1]
  1. [1] Lund University

     Lund University

     Suecia

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 36, Nº 2 (Special Issue: Heating by Electromagnetic Sources), 2017, págs. 546-554
• Idioma: inglés
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• Resumen

  • Purpose – The purpose of this paper is to investigate the added value of using temperature-dependent electric and magnetic properties in high-temperature electromagnetic simulations.

    Design/methodology/approach – In this work, the electromagnetic properties of Domex 420, SSAB, have been characterized as a function of the temperature, from room temperature to 900°C. The measurement of the electric and magnetic properties was performed inside a vacuum furnace at a number of discrete temperature steps, with particularly small intervals around the Curie temperature. A simple transient multi-physics model was used to investigate the impact of the measured properties in three different representations.

    Findings – In certain intervals, a simplified approximation of the properties produces accurate results, while fully parametric representation is beneficial when heating above the Curie temperature.

    Originality/value – Temperature-dependent electromagnetic properties are rarely found, especially in an easy-to-use form. Using parameterized temperature-dependent approximation of key properties shows noteworthy differences in the outcome of high-temperature electromagnetic modeling.