CM-EMI Prediction for 3-Level T-Type Traction Inverters using Wideband-Kriging

The trend towards more sustainable mobility through electric vehicles (EVs) drives research and industry to develop more power efficient and compact power electronic circuits. The powertrain of an electric vehicle consists of an inverter (DC to AC converter) and an electric motor. To further push the performance limits, there is nowadays a trend in research and industry towards the capabilities of 3-Level based inverter typologies. The need to design a system that is electromagnetic compatibility (EMC) compliant is as much a concern as system efficiency. Surrogate model based approaches have been proven useful to predict electromagnetic emissions for simple power electronic circuits. The aim of this work is to show what surrogate model based approaches are capable of in terms of EMI prediction, even when the system complexity is high, as in the case of 3-Level T-Type traction inverters. This opens up a promising new way of predicting and optimising the electromagnetic emissions of electric vehicle’s powertrain without the need for costly prototyping.