Energy Recovery and Capture Suppression of SICG Based on Asymmetric Full-Bridge Conversion Circuit

Capture effect is an inherent characteristic that restricts the launch efficiency of synchronous induction coilgun (SICG). It is generally accepted that the root of the reverse capture force is the sharp drop of the armature coupling flux. Therefore, exhausting the residual magnetic energy as soon as possible becomes a breakthrough to suppress the capture effect. However, previous research on pulsed-power source (PPS) configuration and armature parameter adjustment is merely adequate in improving the launch performance. This article attempts to introduce a voltage-reversible asymmetric full-bridge topology structure based on the fully controlled power semiconductor device to achieve energy recovery and capture suppression. First, the working state of the full-bridge topology and the corresponding equivalent circuit were analyzed, and then, the effect of the recovery time on capture suppression was explored. Finally, the validity and feasibility of the theoretical analysis were verified by experimental results.