An Improved Finite-set Model Predictive Torque Control for Interior Permanent Magnet Synchronous Motor Drives

This paper presents a deadbeat based finite-set model predictive torque control (FS-MPTC) for interior permanent magnet synchronous motor drives. The proposed method contributes to significantly reduce the comparatively high torque ripples experienced in conventional FS-MPTC by using two voltage vectors (VVs) in one sampling cycle. The duty ratio of active VV is determined based on deadbeat torque regulation principle, which equivalently increases the weighting of torque control in FS-MPTC. This may lead to flux de-regulation under certain circumstances. To overcome this obstacle, a simple but effective trade-off scheme is proposed based on flux errors. The validity of the proposed method is verified through simulations.