Comparison of Si/SiC Semiconductor Performance Using Experiment- based Simulation

Abstract:
Silicon carbide (SiC) is a promising material for power semiconductors as it provides many beneficial properties that can lead to efficient, small, and lightweight power converters. This paper evaluates the benefits of SiC switches in hard switched DC/DC-converters and compares them to traditional silicon (Si) based devices. Information on the performance of the switches and other crucial converter components is gathered from experiments and data sheets and then fed into an algorithm. This algorithm includes a model of an entire converter and calculates numerous possible implementations. By calculating a high number of implementations the best solution for each semiconductor can be found and enables a fair comparison of the semiconductors. With SiC technology, weight savings of up to 58% are possible or an average loss reduction of 46% can be achieved compared to traditional Si semiconductors in a 3 kW converter class.