Electromagnetic force of single-stage synchronous induction coilgun at blocked state

In the blocked state, the position of the armature of a single synchronous induction coilgun (SSICG) is fixed. Hence the mutual inductance and mutual inductance gradient between armature and coil are fixed and there is a linear relation between the electromagnetic force and the square of the current of the coil. The current filament equivalent circuit model and the finite element model were created by means of Matlab and Ansoft softwares respectively, and the forces of the armature at different discharging voltages were analyzed by means of the two models respectively. Finally the force was measured by the SSICG prototype in the laboratory and experimental results show a good agreement with the simulation results. It verifies the linear relation between the electromagnetic force and the square of the current of the coil, which provides experimental basis for the dynamic launch of the SSICG.