Suppression switching oscillation in three-phase inverter with 1.7kV/300A SiC modules

SiC MOSFET has superior characteristics such as high switching speed and low switching loss. However, fast switching of SiC MOSFET brings serious voltage oscillations and electromagnetic interface (EMI) noises. In this paper, a DC bus snubber for suppressing switching ringing of an inverter with 1.7kV/300A SiC-MOSFET module is designed. The three-order equivalent circuit model of the switching oscillation is used to design the parameters of the DC bus snubber. Finally, the experimental setup is introduced to verifying the DC bus snubber design.