Development of a 100 kVA SiC inverter with high overload capability of 300 kVA

High overload inverters were developed by using SiC devices for the first time, although its realization by using Si devices had been difficult because of Si´s low maximum Tj. The newly developed 100 kVA overload SiC inverter provides an overload capability rate of 200 % and can supply 300 kVA for up to 3 seconds. Moreover, the volume was downsized to 1/7.5 of the previous inverter and the 150 hour continuous inverter operation test at 110 kVA was performed successfully.