Identifying and protecting short circuit (SC)/over current (OC) scenarios are critical for high power systems like HEV-EV traction inverters, EV charging and solar inverters system. In high power systems, SiC FETs or IGBTs are generally used depending upon the power level and switching frequency. This presentation will discuss the key considerations and design approaches to implement the right protection circuit based on SiC FETs and IGBTs. It will walk through the timings involved from detecting the SC/OC event to safe shut-down, the circuit implementation criteria and experiment data for both IGBT and SiC FETs.
