Model predictive current control for dual three-phase PMSM with hybrid voltage vector

Abstract

To improve the steady-state performance of the dual three-phase permanent magnet synchronous motor with high torque ripple and high harmonic current, this paper proposes a hybrid voltage vector model predictive current control algorithm (MPCC). Firstly, based on the virtual voltage vectors synthesized using the vector characteristics of the fundamental and harmonic subspaces, hybrid voltage vectors are synthesized from the virtual voltage vectors and the zero vector to increase the voltage vector amplitude range to reduce torque ripple and to suppress harmonic currents. Then a vector selection method is proposed to reduce the number of alternative vectors and the calculation burden of the MPCC. Finally, the realization of corresponding PWM modulation is given. The simulation results show that the method effectively suppresses harmonic currents and torque ripple and increases the steady-state performance of the motor.