Modular Silicon Carbide Inverter for Drive Applications with High Voltage Slopes - Challenges Concerning Conducted EMC

In this paper the conducted EMC emissions of a modular hard switching PWM full bridge inverter equipped with SiC-MOSFETs to supply a single electric machine phase is analysed and discussed. The objectives of this investigation are to minimize the stress on the winding isolation and to decrease the EMC emissions by using a passive dv/dt-damping network for the voltage slope reduction in combination with conventional EMC filter circuits.