Abstract：Abstract: For Multi-stage synchronous inductive coil gun, the more mature model in the past literature is electromechanical model based on current filament method. Its merit is that calculation speed is very fast, but its defect that it does not consider the effect of peripheral structure and material of coil gun. Against this case, this paper sets up the 3D transient electromagnetic field-circuit-moving model of Multi-stage inductive coil gun, which uses vector magnetic potential 、current in the circuit. The force is calculated by nodal force method. According to kinematics model of armature, finite element analysis(FEA) model coupled circuit field and movement used in analyzing Multi-stage inductive coil gun is presented in this paper. The performance of a 5 stage inductive coil gun is analyzed using above model. The calculation result is very close to the measure results, which verifies the model precision.
2012, Vol. 33 
