Fe-Ga合金换能器动态输出特性分析

发布时间：2018-05-06 21:35

本文选题：涡流损耗 + Fe-Ga合金　；参考：《传感技术学报》2017年06期

【摘要】：Fe-Ga合金具有应变大、响应时间短、能量密度高、磁机耦合系数高、驱动方式简单等优点。Fe-Ga合金换能器在高频驱动电流下会产生涡流损耗。驱动电流频率越大,集肤效应越明显,涡流损耗越大,磁场分布越不均匀,从而影响换能器的输出位移和输出功率。首先基于麦克斯韦方程组分析了不同频率下Fe-Ga棒内的磁场分布,结合结构动力学模块分析了Fe-Ga合金换能器棒内的磁场分布,进而得到Fe-Ga合金换能器的输出位移和频率的关系。结果表明,所使用的Fe-Ga合金换能器共振频率为700 Hz,最大输出位移为6μm。
[Abstract]:Fe-Ga alloy has many advantages, such as large strain, short response time, high energy density, high coupling coefficient and simple driving mode. The larger the driving current frequency is, the more obvious the skin effect is, the larger the eddy current loss is, and the more uneven the magnetic field distribution is, thus affecting the output displacement and output power of the transducer. The magnetic field distribution in Fe-Ga rod at different frequencies is analyzed based on Maxwell equations, and the magnetic field distribution in Fe-Ga alloy transducer rod is analyzed in combination with structural dynamics module, and the relationship between output displacement and frequency of Fe-Ga alloy transducer is obtained. The results show that the resonance frequency of the Fe-Ga alloy transducer is 700 Hz and the maximum output displacement is 6 渭 m.
【作者单位】：河北工业大学电磁场与电器可靠性省部共建重点实验室;
【基金】：国家自然科学基金项目(51201055) 河北省高等学校科学技术研究重点项目(ZD2015085) 天津市高等学校科技发展基金项目(20140421) 教育部留学归国人员启动基金和河北省引进留学人员项目(CG2013003001)
【分类号】：TB552;TG132.2

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