门极换流晶闸管透明阳极的机理与特性分析

通过分析门极换流晶闸管（GCT）透明阳极的电流输运过程，研究了透明阳极的机理，导出 了透明阳极电子电流密度的表达式.并利用MEDICI软件对GCT的开关特性进行了模拟，验证了 理论分析的正确性.另外，将GCT与具有普通阳极的门极可关断晶闸管（GTO）进行比较，分 析了透明阳极的特性，结果表明将透明阳极与缓冲层结合使用，可以更好地协调GCT的阻断 特性、通态特性及开关特性之间的矛盾，从而有效地改善GCT的综合特性.结论得到了实验结 果的证实. 关键词： 透明阳极 电力半导体器件 门极换流晶闸管 注入效率

Analysis of the mechanism and characteristic for the transparent anode in a gate commutated thyristor

The mechanism of the transparent anode in gate commutated thyristors (GCT) was i nvestigated by analyzing its current transportation theoretically, and the expre ssion of the electron current density at the transparent anode is deduced. The s imulation result of the CCT's switching characteristic validates the correctnes s of the mechanism analysis for the transparent anode. In addition, the characte ristic of the transparent anode in GCT devices was analyzed by compared with gen eral anode in GTO devices. The results show that the transparent anode can impro ve effectively the switching characteristic and reduce the switching loss, and t he transparent anode with an additional n buffer layer used in GCT can make the trade off among the on-state characteristic,blocking characteristic and switchin g characteristics,and improve further the characteristics of GCT.The conclusions are validated by the experiment results.