Simulation Analysis of Forces on Armature in Helical Coil Electromagnetic Launchers

The influencing factors of forces on armature in helical coil electromagnetic launchers(HCELs) were 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 that there exists a maximum force position.The maximum force increases with the coil axial length increase,given the fixed coil diameters.The acceleration of armature reaches its maximum when the axial length of coils is short.The maximum force of armature is proportional to the square of the current,and the maximum force position does not change.The simulation results confirm the basic theory of HCEL and provide a reference for the structural design.