Fault Tolerant Control of PMSM Drive Based on Voltage Sensor for Electric Vehicle Application

This paper suggests a sensorless control of a Permanent Magnet Synchronous Motor (PMSM) which is based only on voltage sensors. It can contribute to saving on manufacturing and maintenance costs by removing the considered sensors from the electric powertrains. Otherwise, the use of the proposed approach can contribute considerably to avoiding several problems caused by faults occurring on current and speed sensors. A current observer based on a mathematical PMSM model is proposed to estimate the dq currents in faulty mode. Also, an MRAS observer is designed to estimate the mechanical speed. In addition, a Fault Detection and Isolation (FDI) strategy is included in the global control scheme to detect and isolate faults before switching to a sensorless faulty mode. The simulation are done using a 60 kW PMSM with an EUDC driving cycle combined with an aerodynamic model of the blue car electric vehicle in Matlab/Simulink. It is noted from the obtained results that the PMSM drive performances in faulty mode are very acceptable in terms of torque ripples, speed tracking, and robustness to external disturbances..