改进型永磁同步电机双矢量模型预测电流控制

The Improved Predictive Current Control of PMSM Based on Two-Vector Model

针对传统永磁同步电机占空比模型预测电流控制稳态效果差、动态性能不足等问题,提出了一种改进型双矢量模型电流预测控制策略,将无差拍控制目标由q轴电流的参考值替换为当前采样时刻测量值,消除了传统占空比控制中的电流偏差项,以便于工程实现。改进的控制策略可以大大降低控制器计算负担,有效降低转矩脉动,提高系统的动稳态性能。仿真结果验证了所提控制算法的可行性与有效性。

Aiming at the problems of the poor steady-state effect and the limited dynamic performance in duty-cycle-based modally-predicted current control of traditional PMSM,this paper proposes an improved current predictive control strategy based on two-vector model.In which,the dead-beat control objective is to replace the reference value of q-axis current by the actually-adopted measure value.The current deviation in traditional duty-cycle control is eliminated so as to be convenient for the engineering implementation.The improved control strategy can greatly reduce the computation burden of controller,effectively suppress the torque pulsation,and improve the dynamic-and steady-state performances of system.The simulation result has proved the feasibility and effectiveness of the proposed control method.