Efficiency improvement of three phase traction inverter through GaN devices for PMSM

The impact of GaN devices and the improvement in efficiency while using such devices in three-phase traction inverter for Electric Vehicles are presented in this paper. Two versions of inverters have been illustrated: first one with Si-IGBT devices while second one is built with GaN-MOSFETs with similar rating of voltage and current. The loss model is expounded for both the inverters; thereafter total losses are calculated along the speed and torque of the PMSM motor. Moreover, the losses of both types of inverters are compared and the compared result confirmed that the inverter built up with GaN-MOSFETs increases the driving range of the Vehicles.