双三相永磁同步电机改进型模型预测电流控制OA北大核心CSTPCD

An improved model prediction current control is proposed to address the disadvantages of the model predictive common-mode voltage suppression method for double-three-phase permanent magnet synchronous motors,including the size of the optimization calculation,high switching frequency,and poor steady-state performance.Firstly,the six-phase two-level inverter is improved for reducing the common-mode voltage of zero-vectors.Secondly,the virtual voltage vector is constructed by choosing small common-mode voltage vectors,which simplifies the value function and reduces the common-mode voltage and current harmonics.Then,the optimal voltage vector is directly selected by calculating the reference voltage vector to reduce the number of optimization-seeking times,and the duty cycle control is introduced to enhance the motor control accuracy and steady-state performance.Finally,the traditional model predictive current control,RCMV(reduced common mode voltage)-1,RCMV-2,and the proposed control method are simulated and compared.The results show that the proposed control method reduces the torque pulsations and harmonic currents while decreases the common-mode voltage,and the switching frequency is significantly lower than that of the RCMV-2 method.In addition,the execution time of the optimization-seeking code is reduced by about 91％and 65％compared with RCMV-1 and RCMV-2,respectively,which reduces the computational amount.