基于模型预测的永磁同步电机精确控制策略设计

Design of precise control strategy for permanent magnet synchronous motor based on model prediction

针对永磁同步电机具有非线性和强耦合的特点,采用传统控制策略进行控制存在动态响应速度和抗负载性能有限的问题,通过引入滑模扰动观测器和无差拍控制器,提出一种基于模型预测的控制策略。仿真结果表明,所提方法在空载变速、低速运行、加减载变速不同工况下可实现永磁同步电机对目标速度的准确跟随,并降低预测电流误差导致的电机扰动。相较于MPCC策略与DB-MPCC策略,所提控制策略在起动响应性能、稳态性能、抗负载扰动性能上具有明显优势,参数鲁棒性更强,具有一定较强的有效性和优越性。

In view of the nonlinear and strong coupling characteristics of permanent magnet synchronous motor,the traditional control strategy has the problems of limited dynamic response speed and anti load performance.By introducing sliding mode disturbance observer and designing deadbeat predictive controller to replace the PI controller in the traditional control strategy,a control strategy based on model predictive current control is proposed,The precise control of permanent magnet synchronous motor is realized.The simulation results show that the proposed control strategy can accurately follow the target speed of permanent magnet synchronous motor under different working conditions of no-load speed change,low-speed operation and load and load change,and reduce the motor disturbance caused by the prediction current error.Compared with MPCC strategy and db-mpcc strategy,the proposed control strategy has obvious advantages in starting response performance,steady-state performance and anti load disturbance performance,stronger parameter robustness,and certain strong effectiveness and superiority.