Stress of Driving Coil and Its Affecting Factors in Helical Electromagnetic Launchers

Based on Ansoft-Maxwell finite-element software,this paper investigated 3D stress filed issue of reluctance helical electromagnetic launchers.The influencing factors of stress on driving coil in helical coil electromagnetic launchers(HCEL's) were analyzed numerically,such as the relative position of the armature and stator,current magnitude,armature and stator size.The results show that,the stress is related to the position of the armature,and the least stress position exists.The maximum stress of driving coil is proportional to the squre of the current.The stress is related to axial length and radius of the armature,and the least stress parameter exists.And there also related to axial length and radius of the driving coil.