摘要
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 .
The mechanism of the transparent anode in gate commutated thyristors (GCT) was investigated by analyzing its current transportation theoretically, and the expression of the electron current density at the transparent anode is deduced. The simulation result of the CCT's switching characteristic validates the correctness of the mechanism analysis for the transparent anode. In addition, the characteristic of the transparent anode in GCT devices was analyzed by compared with general anode in GTO devices. The results show that the transparent anode can improve effectively the switching characteristic and reduce the switching loss, and the transparent anode with an additional n buffer layer used in GCT can make the trade off among the on-state characteristic, blocking characteristic and switching characteristics, and improve further the characteristics of GCT. The conclusions are validated by the experiment results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期2296-2301,共6页
Acta Physica Sinica
基金
陕西省教育厅专项科研计划项目 (批准号 :0 4JK2 45 )资助的课题 .~~
