考虑电压饱和的永磁同步电动机动态解耦控制

Dynamic Decoupling Control for PMSM with Considering Voltage Saturation

针对永磁同步电动机矢量控制中不能对定子电流d轴分量和q轴分量进行动态解耦的特点,采用双PI动态解耦的方法,避免了反馈解耦、对角矩阵解耦等方法中电机参数变化对解耦效果影响较大的问题,以及逆系统方法、基于微分几何原理解耦方法的复杂性。由于逆变器的饱和电压输出会导致电流的超调和振荡,在动态解耦的基础上提出了一种电压抗饱和的设计方法,并且通过进行补偿将双PI动态解耦控制和电压抗饱和设计有效地结合起来。仿真验证了这种动态解耦控制方法的有效性。

In a speed servo system of vector-controlled PMSM, coupling between d-q current in dynamic process impairs the characteristics of torque response. This paper adopted a dual-PI dynamic decoupling method. The robustness to the motor parameter estimation errors and easy application were the advantages of this method. Furthermore, in order to decrease the overshoot and oscillation of current response, a method of voltage anti-windup was proposed. Compensations were made to combine the dual-PI dynam- ic decoupling control with voltage anti-windup design effectively. The simulation results verified the efficiency of the proposed methods.