Influence of armature and rail geometry parameters on inductance gradient of electromagnetic rail launcher
Armature is a key component of the electromagnetic rail launcher,but previous studies on the inductance gradient consider the armature to be infinitely far from the tail of the railgun,ignoring the influence of the armature on the inductance gradient of the rails.Therefore,a 2-dimensional and a 3-dimensional model of electromagnetic rail launcher were respectively established so as to compare and analyze the difference between the inductance gradient of the rails without armature and the in-ductance gradient of the rails near the armature.The effect of the U-shaped armature size on the in-ductance gradient of the electromagnetic rail launcher was also investigated based on the 3D model of the electromagnetic rail launcher with armature.The results of study show that with the increase of the rail width,rail spacing,and rail thickness,the errors between the inductance gradient of the rails without armature and the inductance gradient of the rails near the armature are gradually increased,and the increase of two armature widths,the inductance gradient of the electromagnetic rail launcher tends to decrease,but the amount of change is not significant.
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