微型超磁致伸缩高速阀致动器的优化设计

Optimization design of giant magnetostrictive micro high-speed valve actuator

通过优化设计驱动线圈和Terfenol-D的形状尺寸,改善以超磁致伸缩材料Terfenol-D为主动材料的高速开关阀的性能.选择合适的漆包线线径以降低线圈电阻;优化线圈形状函数以提高线圈的磁场生成能力;改善Terfenol-D的尺寸来降低磁通路径的磁阻,减小涡流损耗,提高致动器的磁场利用率;兼顾提高致动器的能量转换效率,提出优化设计超磁致伸缩致动器的规律.两个致动器的实验对比验证了该设计方法的可行性.

The performance of giant magnetostrictive micro high-speed valve was improved through reforming the shape of coil and giant magnetostrictive material Terfenol-D. Choosing appropriate diameter of enameled wire can decrease the resistance of solenoid; increasing the solenoid＇s geometry factor can improve the magnetic field level; and optimizing the geometry of Terfenol-D can decrease the magnetic reluctance, lessen the eddy current losses and increase the effective flux. Considering all these analysis results with the method of improving the energy conversion efficiency, the rule of optimization design for giant magnetostrictive actuator was put forward. The experimental contrast in the performance of two actuators proved the validity of the rule.