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首页> 外文期刊>Magnetics, IEEE Transactions on >Stress-Induced Eddy Currents in Magnetostrictive Energy Harvesting Devices
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Stress-Induced Eddy Currents in Magnetostrictive Energy Harvesting Devices

机译：磁致伸缩能量收集装置中的应力感应涡流

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摘要

The paper aims to provide a more accurate analysis of a magnetostrictive energy harvesting device by proposing a FEM model which, assuming a realistic nonlinear characteristic of the material, is able to describe the harvesting phenomena in presence of the eddy currents induced by the Villari effect. The study is focused on the investigation of the influence of those parameters, such as pre-stress and bias, on the field dynamics and, consequently, on the eddy currents loss phenomena which cannot be disregarded if a reliable prediction of the global performances of these devices is required. The numerical results are computed by considering a compressive stress-driven vibration source and show spatial profiles of the fields, losses, and recovered powers in different operating conditions. Comparisons with the linear model are also provided.
机译：本文旨在通过提出一个有限元模型来提供对磁致伸缩能量收集装置的更准确的分析，该模型假设材料具有现实的非线性特性，能够描述在存在由维拉里效应引起的涡流的情况下的收集现象。该研究的重点是调查这些参数（例如预应力和偏置）对磁场动力学的影响，并因此研究涡流损耗现象，如果可靠地预测这些参数的整体性能，则不能忽略这些现象。设备是必需的。数值结果是通过考虑压应力驱动的振动源计算得出的，并显示了在不同工作条件下的磁场，损耗和恢复功率的空间分布。还提供了与线性模型的比较。

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