| Abstract |
In the application of a low voltage grid converter, five different state-of-the-art semiconductor devices are investigated with regards to their power loss dependency on the converter side filter inductance, which directly determines the waveform and especially the ripple of the converter output current. Comprehensive simulations of two Si IGBTs and two SiC MOSFETs reveal, that the converter losses change in a range of less than 2 \% when the filter inductance is reduced by 60 \%. This small is influence is confirmed by experimental investigations with two different converters, where the overall power losses change in a range of less than 6 \%. The reduction of the filter inductance leads to a slight efficiency improvement of the SiC converter. Measurements show that the filter losses, which contribute a significant share to the overall losses, can be reduced by choosing a smaller inductance, if the changing DC resistance is considered. |
