Title :
Design consideration for large current GTO
Author :
Yatsuo, T. ; Kimura, S. ; Satou, Y.
Author_Institution :
Hitachi Ltd., Ibaraki, Japan
Abstract :
Current crowding of a GTO (gate-turn-off) during turn-off operation and operating limits without breakdown were investigated by a current-distribution-measurement method and by computer simulation. It was found that to increase the maximum turn-off current, current crowding is suppressed by a gate structure optimized for the distribution of a steady on-state current. Also, current flowing into a unit GTO is reduced by optimizing the number of unit GTOs so that they are operating in a safe operating area. The characteristics of a 4000 A trial GTO fabricated on the basis of these considerations are reported.<>
Keywords :
semiconductor switches; thyristors; 4000 A; computer simulation; current crowding; current-distribution-measurement method; gate-turn-off; large current GTO; maximum turn-off current; safe operating area; thyristor; Cathodes; Coils; Current distribution; Current measurement; Electric breakdown; Electrodes; Electromagnetic measurements; Proximity effect; Testing; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18222
