A simplified model predictive current control strategy based on mathematical auxiliary line method is proposed to increase the permanent magnet synchronous motor (PMSM) predictive current control system’s steady-state performance while reducing the system’s computational complexity. The mathematical models of current prediction, first-order compensation, and cost function are presented by analyzing the prediction current control strategy of the conventional models. Within a control cycle, the simplified model predictive current control algorithm applies two voltage vectors and omits the error calculation of cost function. The anticipated voltage of transformer obtained from the beat-free current control standard is considered the reference voltage, and the judgment of the area, where the reference voltage vector is found and the strategy for double voltage vector is selected, is put forward. The optimal voltage vector can be directly output without the error calculation of the cost function in the method, thereby effectively reducing the computation load and complexity of the system and improving the steady-state performance. Experimental results verify the validity and accuracy of the proposed simplified model of predictive current control strategy for PMSM control.

提出一种基于数学辅助线法的简化模型预测电流控制策略，以提高永磁同步电机（PMSM）预测电流控制系统的稳态性能，同时降低系统的计算复杂度。通过分析常规模型的预测电流控制策略，提出了电流预测、一阶补偿和成本函数的数学模型。在一个控制周期内，简化模型预测电流控制算法应用两个电压矢量，省略了成本函数的误差计算。从无差拍电流控制标准中得到的变压器的预期电压作为参考电压，根据地区的判断，在此基础上找到参考电压矢量并选择双电压矢量策略。该方法无需对代价函数进行误差计算，即可直接输出最优电压矢量，有效降低了系统的计算量和复杂度，提高了稳态性能。实验结果验证了所提出的用于 PMSM 控制的预测电流控制策略简化模型的有效性和准确性。