一种新型磁阻型螺旋线圈电磁发射器的仿真研究

Simulation Analysis of a New Reluctance Helical coil Electromagnetic Launchers

新型磁阻型螺旋线圈电磁发射器结合了磁阻型电磁发射器的工作原理和螺旋线圈型电磁发射器(HCEL)的基本结构。对弹丸受力的影响因素,如弹丸与驱动线圈相对位置、弹丸和驱动线圈尺寸、电流大小等,进行了静态模拟。结果表明,弹丸的受力大小与其相对驱动线圈的位置有关,且有一个最大受力位置。驱动线圈半径固定时,弹丸最大受力随线圈轴向长度增大而增大,线圈长径比为1:2时弹丸加速度达到最大。在电流较小的情况下,弹丸最大受力与线圈每匝电流平方成正比,最大受力位置随电流增大而增大;而铁磁质弹丸达到磁饱和后,弹丸最大受力只与电流成正比,最大受力位置不随电流变化。仿真结果验证了HCEL的基本理论,并为新型磁阻型电磁发射器结构的设计提供了参数支持。

The new reluctance electromagnetic launchers are based on the working principle of reluctance electromagnetic launchers and the basic structure of helical coil electromagnetic launchers(HCEL).The influencing factors of forces on armature are analyzed numerically,such as the relative position of the armature and stator,armature and stator size,current magnitude.The results show that,the force is related to the position of the armature,and there is a maximum force position.Given the fixed coil diameter,the maximum force increases with the increasing axial length of the coil.The maximum acceleration of armature shows when the ratio of the axial length to the radial length of coil is 1:2.When the current is lower,the maximum force of armature is proportional to the square of the current,and the maximum force position increases with the increasing current.The maximum force of armature is proportional only to the current after the magnetic saturation of the armature,and the maximum force position does not change.The simulation results confirm the basic theories of HCEL and provide a reference for the structural design.