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On the energy-based variational model for vector magnetic hysteresis

机译:基于能量的矢量磁滞变分模型

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摘要

We consider the quasi-static magnetic hysteresis model based on a dry-friction like representation of magnetization. The model has a consistent energy interpretation, is intrinsically vectorial, and ensures a direct calculation of the stored and dissipated energies at any moment in time, and hence not only on the completion of a closed hysteresis loop. We discuss the variational formulation of this model and derive an efficient numerical scheme, avoiding the usually employed approximation which can be inaccurate in the vectorial case. The parameters of this model for a nonoriented steel are identified using a set of first order reversal curves. Finally, the model is incorporated as a local constitutive relation into a 2D finite element simulation accounting for both the magnetic hysteresis and the eddy current.
机译:我们考虑基于干摩擦的准静态磁滞模型,如磁化强度的表示。该模型具有一致的能量解释,本质上是矢量的,并且可以确保在任何时候(不仅是在闭合的磁滞回线完成时)都可以直接计算存储和耗散的能量。我们讨论了该模型的变分公式并推导了一种有效的数值方案,避免了通常采用的近似方法,这种近似方法在矢量情况下可能是不准确的。使用一组一阶反转曲线可以识别非定向钢模型的参数。最后,该模型作为局部本构关系并入二维有限元模拟中,考虑了磁滞和涡流。

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