In order to clarify the magnetic characteristics of a four-redundancy linear force motor for a direct-drive servo valve,the magnetic circuit model of the linear force motor was established by analytical method,and its magnetic circuit distribution,armature stress and armature displacement-force characteristics under normal/fault conditions were analyzed based on Maxwell.The comparison of armature displacement-force characteristics under normal/fault conditions show that the two structures have the same static charac-teristics under normal operation;in fault mode,the influence of each coil fault on the static characteristics of the force motor is the same under radial layout structure,the influence of each coil fault on the static characteristics of the force motor is related to the position of the faulty coil under axial layout structure.In addition,the frequency characteristics under transient field and the induced electromotive force between coils were analyzed.The results show that the amplitude-frequency characteristics of the axial layout structure are higher than those of the radial layout structure.The magnetic characteristics of four-redundancy linear force motor are analyzed in detail,which provides guidance for its further design improvement.
关键词
四余度线性力马达/磁力特性/感生电动势/直驱阀
Key words
four-redundancy linear force motor/magnetic properties/induced electromotive force/direct drive valve
维普
万方数据