EMI Modeling of Three-Level Active Neutral-Point-Clamped SiC Inverter Under Different Modulation Schemes

This paper investigates the electromagnetic interference (EMI) emission in three-level active neutral-point-clamped (3L-ANPC) silicon carbide (SiC) inverter. Four typical modulation schemes of 3L-ANPC inverter are considered. An EMI model is established by including all the system parasitics and noise sources. Based on this model, a comparison of different modulation schemes on EMI emission is carried out. Simulations are performed in a case study to confirm the theoretical expectations.