Servo brake control based on finite control set-model predictive control with a voltage smoother

This study presents an angular position control strategy for servo brake motion of an electric motor based on a finite control set-model predictive control (FCS-MPC) with a voltage smoother. In the proposed control scheme, the controller predicts the future current, speed and angular position with a finite set of smoothed voltages and outputs the optimal smoothed voltage by using pulse width modulation (PWM). Smoothed voltages effectively reduce current ripple, which results in less parasitic oscillations of the angular position while tracking the reference target. The simulated and experimental results obtained with a permanent magnet synchronous motor (PMSM), fed by a 2-level 3-phase voltage source inverter, show that the proposed method has both excellent performance of current ripple reduction and excellent dynamic performance in servo brake motion.