A new generation of fast-switching thyristors
A new generation of fast-switching thyristors (FSThs) has been developed. It includes 1001000A/8001200V and 1602000A/20002500V devices, turn-off times of them are equal to 6.312.5?s and 3263?s, respectively. A new cathode emitter topology is proposed. It allows one to exclude the influence of the passive area of a pnpn structure on the temperature dependence of maximal off-state voltage VDm, on the values of critical rate of rise of off-state voltage (dVD/dt)cr and on the turn-off time tq. It also promotes some reduction of turn-on losses. Prototype samples of 16002000A, 2500V FSTh, having such cathode emitter topology, were fabricated. Their testing results confirm a new approach for the design of FSTh cathode emitter topology.
thyristors cathode emitter topology design silicon wafer