GMM换能器的设计优化

Optimization of GMM Transducer Design

以超磁致伸缩材料(GMM)Terfenol--D为主动材料的换能器的性能可以通过改善驱动线圈和GMM的形状,选择合适的材料进行优化。对于尺寸有限制的微型换能器,本文用matlab分析了磁场与线圈内径和漆包线线径之间的关系,提出了提高线圈的磁场生成能力的方法;仿真了能量转换效率与GMM棒的外径和它的内外径比值之间的关系,提出了提高线圈能量转换效率的措施;分析了如何提高GMM的有效磁通量、减小涡流损耗的方法。用ANSYS软件对三种换能器的材料组合进行磁通量分布的有限元仿真,确定了换能器材料选择的规律。多个换能器的对比实验验证了此优化设计方法的正确性。

The performance of transducer whose active material is giant magnetostrictive material （GMM）, can be improved through reforming the shape of coil and GMM, and choosing profit material in transducer. This article discussed the rule of optimization of dimension limited micro transducer. These include how to increase the effective flux of Terfenol-D, decrease the losses of eddy current, enhance the energy transferring efficiency using matlab and ANSYS. The experimental results proved the rule was valid.