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首页> 外文期刊>IEEE Transactions on Magnetics >Measurement and Prediction of Magnetic Losses in Mn-Zn Ferrites From DC to the Megahertz Range
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Measurement and Prediction of Magnetic Losses in Mn-Zn Ferrites From DC to the Megahertz Range

机译：直流到兆赫兹范围内Mn-Zn铁氧体磁损耗的测量和预测

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摘要

The magnetic energy losses and their frequency dependence in Mn-Zn ferrites have been investigated in theory and experiment. A novel theoretical approach has been developed, which is based on the concept of loss decomposition and the appraisal of the separate contributions provided by domain wall displacements and moment rotations. It is shown that the role of eddy currents in energy dissipation is a minor one and can be appreciated in the megahertz region only. The loss contribution by domain walls versus frequency is obtained from knowledge of the quasistatic energy loss, whereas the rotational real and imaginary permeabilities are derived as solutions of the Landau–Lifshitz–Gilbert equation for distributed values of the effective anisotropy field. The model successfully applies to results obtained on commercial ferrite ring samples.
机译：理论和实验研究了锰锌铁氧体中的磁能损耗及其频率依赖性。已经开发了一种新颖的理论方法，该方法基于损耗分解的概念以及对畴壁位移和力矩旋转提供的单独贡献的评估。结果表明，涡流在能量耗散中的作用是次要的，仅在兆赫兹区域才可以理解。准静态能量损失的知识获得了畴壁相对于频率的损耗贡献，而旋转的实磁通量和虚磁导率是作为有效各向异性场分布值的Landau-Lifshitz-Gilbert方程的解而得出的。该模型成功地应用于在商业铁氧体环样品上获得的结果。

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