180kVA Three Phase SiCGT Inverter Utilizing Novel VF Degradation Reduction Phenomena for SiC Devices

A novel phenomena of VF degradation reduction, TEDREC phenomena, was found, which can reduce the degradation by increasing SiC device temperature. To realize safe and repeatable operation of degraded SiC devices and to achieve a drastic reduction in their cost, TEDREC method was developed by using the phenomena. A 180 kVA class SiC inverter was also developed by using the method, which is the largest one among the reported SiC inverters.