基于电流预测控制的永磁同步电机矢量控制策略

Vector control strategy for permanent magnet synchronous motor based on current predictive control

针对传统永磁同步电机控制系统存在动态响应速度和稳态精度较差的问题,提出了一种基于电流预测控制的永磁同步电机矢量控制策略.在传统矢量控制的基础上引入模型预测控制来代替传统电流PI控制,将永磁同步电机的数学模型离散化,并根据开关状态的选择建立评价函数.基于上述理论分析,在Matlab/Simulink环境中建立了仿真模型.结果表明,所提出的永磁同步电机矢量控制策略具有较快的响应速度和较小的超调,且稳态转速与电流波动较小.

Focused on the poor dynamic response speed and inferior steady state accuracy of traditional permanent magnet synchronous motor( PMSM) control system,a vector control strategy for permanent magnet synchronous motor based on current predictive control was suggested. On the basis of traditional vector control,a model predictive control was introduced in lieu of traditional current PI control. The mathematical model for the permanent magnet synchronous motor was discretized,and an evaluation function was established according to the selection of switch states. Based on the above-mentioned theoretical analysis,a simulation model was established in the Matlab/Simulink environment. The results show that the as-suggested vector control of PMSM has faster response speed and smaller overshoot,and its steady state speed and current fluctuation is smaller.