Current Sensorless Deadbeat Predictive Control for Permanent-Magnet Synchronous Motor Drives

This paper proposes a current sensorless permanent magnet synchronous motor (PMSM) drive scheme based on deadbeat predictive control in which a space vector pulse modulator is introduced for feedback currents to track reference currents accurately. Current sensors are omitted by replacing actual currents with predicted currents, thus only a position sensor is needed and a low-cost servo system is achieved. PI control is adopted for the speed loop. Simulation comparisons between control with current sensors and current sensorless control under external disturbances or parameter inconsistency are conducted to indicate that the performance of current sensorless control is almost the same as that of control with current sensors when the prediction model is accurate.