[关键词]
[摘要]
针对永磁同步电机(PMSM)单矢量模型预测电流控制(MPCC)中,电流存在较大波动问题,提出了一种改进型双矢量MPCC(TV-MPCC)算法。每个扇区用零矢量和1个有效电压矢量或者2个有效电压矢量合成1个期望电压矢量,利用价值函数最小值原理,选出最优电压矢量。通过dq轴电流无差拍控制方法来计算电压矢量的作用时间,对电流实现无差拍控制。最后在MATLAB/Simulink环境中搭建模型进行仿真,结果表明与单矢量MPCC相比,优化后的控制策略减小了电流波动,提高了系统稳定性。
[Key word]
[Abstract]
For the problem that current in single-vector model predictive current control (MPCC) of permanent magnet synchronous motor (PMSM) fluctuates greatly, an improved two-vector model predictive current control (TV-MPCC) algorithm is proposed. A zero voltage vector and an effective voltage vector or two effective voltage vectors in each sector are used to synthesize a desired voltage vector, and the optimal voltage vector is selected by using the principle of minimization of value function. The action time of the voltage vector is calculated by the dq-axis current dead-beat control method, which can realize dead-beat control of the current. Finally, the model is built in MATLAB/Simulink. The simulation results show that, compared with the single-vector MPCC, the optimized control strategy reduces the current fluctuation and improves the system stability.
[中图分类号]
[基金项目]
教育部协调育人项目(201802240009);湖北省重点研发计划项目(2020BAA005、TC200802C、TC200A00W)