Comparisons of STRETCH meat grinders based on two different topologies of ICCOS

Inductive energy storage systems （IES）require opening switches which are technically much more difficult to realize than closing switches. Institute of Advanced Technology （ IAT ） puts forward a meat grinder with an inductive pulse power topology called slow transfer of energy through capacitive hybrid （STRETCH）. In this topology, an integrated gate-commutated thyristor （IGCT） is capable of breaking the charging currents on the order of 4 kA, and it may encounter difficulties in expanding to higher energy systems. German-French Institute of Saint Louis （ISL） has developed a high-power opening switch based on standard high-power thyristors by using their so-called inverse current commutation with semiconductor devices （ICCOS） countercurrent commutation principle. Two topologies of the STRETCH meat grinder with ICCOS are analyzed. And they are compared based on the voltage across the main switch, the current multiplication factor and other aspects by u- sing Matlab simulations. The advantages and disadvantages of the two topologies are shown through the comparisons. Therefore a more suitable topology can be chosen for realistic applications accord- ing to their performances.

双电感型脉冲电源模块负载电流的研究

轨道炮的发射需要幅值足够大脉宽足够宽的梯形波电流。研究了两个电感型脉冲电源模块给同一负载供电时的三种工作模式,在不同的工作模式下,负载的电流放大倍数和脉宽增值不同。由实验和仿真结果知:两个STRETCH meat grinder电源模块在相同模式下工作时,负载电流放大倍数最大,脉宽增值最小。在主管同开同断且晶闸管延时的模式下工作时,脉宽增值最大,电流放大倍数最小。以第二模块延时第一模块的模式工作时,负载电流的放大倍数和脉宽增值都是居三模式之中,因此可通过选取合适的触发方式获得所需要的负载电流。