volume | PIER Journals

Abstract

In order to solve high torque ripple of permanent magnet synchronous motor (PMSM) for marine electric propulsion under the current control methods, the improved model predictive current control (MPCC) of PMSM for marine electric propulsion based on the mathematical model of three-phase PMSM is proposed. First, the stator current prediction model is derived based on the forward Euler method. Then the first optimal voltage vector is obtained by the value function, and the second optimal voltage vector, and the second optimal voltage vector and the first and second optimal voltage vectors' respective action times are obtained by the q-axis deadbeat control, which are directly fed back to the inverter. The proposed control method is verified by simulation and hardware in the loop simulation experiment. The experiment results show that, in comparison with the direct torque control based on space vector modulation (SVM-DTC) in the case of motor speed and torque mutation, the torque ripple of motor is reduced by 9.40% and 4.80% respectively based on improved MPCC. The feasibility and effectiveness of the proposed method are verified by the simulation and experiment results.

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Dr. Xiyang Zhao

Professor Jingwei Zhu

Dr. Zhibin Wang