Finite Control Set Model-Predictive Speed Control with a Load Torque Compensation

This paper presents a gain tuning method of the load torque compensator for direct speed control based on finite control set model predictive control (FCS-MPC). In this method, the transfer function between the error in predicted speed and the load torque is constructed and used for gain parameter tuning of a load torque observer-based prediction error correction. By using the proposed method, the stability and the responsiveness of FCS-MPC with a load torque compensation can be improved without a fully simulating the electric drive systems and experiments. The simulation and experimental results obtained with a permanent magnet synchronous motor, fed by a two-level three-phase voltage source inverter, show that the tracking performance of the direct speed control tuned by the proposed method was excellent under load torque conditions.