4.5 kV 60A SICGT and its Half Bridge Inverter Operation of 20kVA Class

Abstract

4.5kV 60A SICGT of 6mm times 6mm chip size has been developed, which has the largest electric power handling capability among the reported SiC switching devices. Due to the fast turn-on time of 0.08mus and the fast turn-off time of 2.3mus at 250degC, SICGT can realize a low power loss as compared with 4.5kV Si GTOs and 4.5W Si IGBTs. A PWM half bridge inverter was built by using a couple of SICGT modules. Each module consists of one SICGT and two SiC pn diodes in a TO3 type package. The inverter achieved an output power of 20 kVA at V DC of 2kV and carrier frequency of 2kHz, This represents the largest output power among the reported SiC inverters