Model predictive current control method of dual three-phase permanent magnet synchronous motor based on improved SVPWM

In this paper, a model predictive current control (MPCC) method for dual three-phase permanent magnet synchronous motor (DTP-PMSM) based on improved SVPWM is proposed, which can reduce the harmonic current, simplify the traditional prediction model and cost function, and solve the problems of large calculation burden and unfixed switching frequency in the traditional MPCC method of DTP-PMSM. Firstly, this proposed method the predictive model to calculate the voltage vector position instead of using the cost function to choose the best, which reduces the calculation burden. Secondly, a synthetic virtual voltage vector is proposed to reduce the harmonic current, and an improved space vector modulation technique is proposed, which omits the step of solving multiple primary equations and simplifies the calculation of vector action time. Thirdly, the principle of sawtooth wave to generate asymmetric PWM wave is analyzed in detail. Finally, the experimental comparison with the traditional MPCC method proves the effectiveness of the proposed method.