The energy recovery sub-circuit for multiple stages of the stretch meat grinder with iccos circuit

Abstract

The STRETCH meat grinder and the ICCOS are two typical inductive pulsed power supply circuits for electromagnetic launch system. On the basis of combing both, a new topology-STRETCH meat grinder with ICCOS-was put forward by Tsinghua University in 2013. After launching the railgun load, all of the remaining energy is stored in the energy transfer capacitor of the circuit. In this paper, the corresponding recovery circuit is designed for the circuit containing four STRETCH meat grinder with ICCOS circuits connected in a XRAM way in order to reuse the remaining energy. The prototype system has 4kA charging current, and thus 28.19kJ magnetic energy. More remaining energy can be recovered by triggering the related thyristors with more times. Simulation results show that the topology with the suggested energy recovery circuit can roughly recover 1/3 of the residual energy to the primary power and has potential prospects for high energy storage systems in the future.