Research on Flat Coil Electromagnetic Launcher

In order to improve the compactness of coil launchers and eliminate the limitation that the size of the launching projectile in the sleeve structure must be smaller than the driving coil, three flat coil electromagnetic emission systems, namely aluminum plate armature system (APAS), induction coil armature system (ICAS), and direct-fed armature system (DFAS), are proposed for low-mass launch. Based on the physical structure of the launcher, finite element models and mathematical models of three systems were established. The circuit characteristics, motion characteristics, electromagnetic characteristics, and mechanical characteristics of the three systems were solved using the finite element analysis method, and the accuracy of the finite element method was verified by numerical analysis results. The data showed that the DFAS has a low current characteristic with a peak current of 21.1 kA, while the DFAS and APAS have energy conversion efficiency of 29.7% and 24.4%. APAS has good electromagnetic protection capability, with a magnetic induction intensity above its armature not exceeding 0.008 t within 0.4 ms. The stress in most areas of the armature and drive coil of the three systems is less than 42.54 MPa. The results showed that the DFAS and APAS have certain engineering application prospects, while the ICAS is not conducive to engineering applications.