Affiliation:
1. Infineon Technologies AG Villach Austria
2. University of Cassino and Southern Lazio Cassino Italy
3. Power Electronic Systems Laboratory ETH Zurich Zurich Switzerland
Abstract
AbstractThis letter presents a hardware demonstrator of an all‐SiC three‐level T‐type (3LTT) inverter with the common‐mode (CM) EMI filter stages placed on the DC input instead of the AC output side, targeting, for example, high‐efficiency PV applications. The extensive experimental characterization shows that state‐of‐the‐art SiC transistors and a DC‐side CM filter enable an unprecedented peak/full‐load efficiency of 99.4% (calorimetric measurement) at 12.5 kW and a power density of 2.4 kW/dm3 (39 W/in3). The demonstrator fulfills CISPR 11 Class A EMI regulations as well as upcoming EMI standards for the frequency range of 9–150 kHz. Compared to other high‐efficiency converters, which often employ bridge legs with more output voltage levels, the described 3LTT concept thus offers a very favorable trade‐off between complexity and performance.
Publisher
Institution of Engineering and Technology (IET)
Subject
Electrical and Electronic Engineering
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