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The performance of high-power inverters is determined strongly by the characteristics of the semiconductor devices. The design of suitable devices is always a compromise between on-state losses and switching losses. In this paper, a new device-the Dual Gate Commutated Thyristor (GCT)-is proposed that combines the advantages of differently optimized GCTs and realizes low conduction and low switching losses in a single semiconductor device. The concept is introduced first, before the analytical design is presented. Next, finite-element-method simulations are employed to extend the investigation to devices that are not yet available. Measurements of a hybrid Dual GCT are added to verify the advantages of the concept. Finally, the results are discussed.
Date of Publication: Sept.-oct. 2009