基于弓张式GMM发音振子的磁路设计及分析

为优化超磁致伸缩发音振子的电磁性能,通过建立振子磁路模型,推导得到了磁路内磁场强度的表达式;通过分析和设计发音振子电磁结构,确定了驱动线圈的线径、匝数和永磁体的剩磁等磁学参数;通过有限元仿真,分析了弓张结构采用不同材料时振子内部磁场的分布情况,表明当采用弹簧钢材料时能满足内部磁场强度和均匀性的要求;通过制作试验样机并测试棒料边缘处的磁场强度,验证了仿真和理论结果的可靠性。最终结果表明,理论和仿真模型能在一定程度上反映磁路元件磁学参数和材料属性对内部磁场的影响,对发音振子的磁路设计具有一定的指导意义。

Design and analysis of magnetic circuit based on bow-type GMM pronunciation vibrator

To optimize the electromagnetic performance of giant magnetostrictive pronunciation vibrator, the expression of the magnetic field intensity is obtained through the establishment of magnetic circuit model. The wire diameter, number of turns, remanence and other magnetic parameters are determined through the analysis and design of the magnetic structure. The distribution of internal magnetic field in the bow-type structure with different materials was analyzed through FEM simulation. A conclusion was drew that the demand for magnetic field intensity and uniformity would be satisfied when the spring steel material was used. And a prototype was fabricated. Through the magnetic intensity test on the edge, the simulation and theory results are of certain dependability. Final results indicate that the theory and simulation model can reflect the effects of magnetic circuit elements’ parameters and material properties on internal magnetic field in a certain extent. And the work is of certain significance for magnetic circuit design.