Simulation and Analysis of Electromagnetic Coilgun

Abstract. This paper presents a method based on Current Hoop Model for the analysis and design of induction coilgun. The cylindrically symmetric armature is subdivided into concentric hoops with diverse rectangular cross-sections, in each of which the current is assumed to be uniform. An equivalent analytical model considering mutually coupling of coils and armature hoops is constructed for dynamic simulation of the coilgun. The circuit equations are solved together with the equation of motion of projectile by using the Treanor method to ensure the convergence. Comparison with the experimental results and the numerical results simulated by Finite Element method (FEM) shows the validity of the presented simulation method for coilgun. The optimization of a six-stage coilgun is achieved by employing the genetic algorithm (GA). It is suggested that the presented algorithm obtains a higher muzzle velocity