磁柱式二维阀用电-机械转换器的数值模拟

Numerical Simulation on 2D Electro-mechanical Converter with Magnetic Column Structure

永磁励磁式电-机械转换器由于永磁体的高温退磁而在应用时存在可靠性问题,为此提出了一种电励磁的磁柱式新型二维阀用电-机械转换器。其结构简单,易于模块化设计和装配,通过对气隙的形状优化设计还有可能获得比例的力矩-转角特性。建立了该电-机械转换器的三维有限元模型,在Ansoft Maxwell平台上分析了其磁场分布,讨论了励磁安匝数、工作气隙、衔铁和极靴的主要结构参数等对驱动力矩-转角特性的影响,分析结果对于后续的工程设计具有较好的参考价值。

An electro-mechanical converter with permanent magnet excited has low reliability due to its demagnetization problem under high temperature. To solve this problem,a novel current excited electro-mechanical converter with magnetic column structure is proposed,which has advantages of simple structure,ease to modularity design and assembly,and it’s possible to obtain potential proportional torque-angle characteristics through shape optimization of air gap. Therefore it is particularly appropriate for military and aerospace industry. A 3D finite-element model is built on the platform of Ansoft Maxwell,and magnetic field distribution is analyzed. The influence of numbers of excitation,working airgap,key structural parameters of armature and pole shoe on torque-angle characteristics is discussed. The numerical simulation results have a reference value for future engineering design.